Top Solar Company Singapore 2026: The Definitive Ranking and Evaluation Guide

What Makes a Solar Company “Top” in Singapore?

Singapore’s residential solar market has exploded. With electricity prices hitting record highs and the government’s Green Plan 2030 targeting 2 GWp of solar by 2030, more homeowners than ever are searching for the top solar company in Singapore to install panels on their roof.

But here is the problem: every solar company in Singapore calls itself “top” or “best” or “leading.” Marketing language is cheap. What actually separates a genuinely top solar company from an average installer hiding behind a nice website?

We spent over 100 hours analysing Singapore’s solar installation landscape — reviewing company track records, warranty terms, equipment choices, pricing structures, customer reviews, financial stability, and after-sales programmes. This is the most comprehensive evaluation of solar companies in Singapore ever published.

Whether you are considering solar for a terrace house, semi-detached home, bungalow, or Good Class Bungalow, this guide gives you the facts, the comparisons, and the framework to identify which company genuinely deserves to be called the top solar company in Singapore in 2026.

Our 8-Point Evaluation Framework

Before ranking any company, we need to be transparent about how we evaluate them. Too many “top 10” lists are paid advertorials. Ours is based on eight weighted criteria that reflect what actually matters to a Singapore homeowner investing in a 25-year asset.

1. Installation Track Record (15% weighting)

How many residential installations has the company completed in Singapore? A company with 500+ residential projects has solved more unique roof challenges than one with 50. Volume matters because every Singapore roof — whether it is a terrace, semi-D, or GCB — presents different structural, shading, and electrical challenges. We also look at how long the company has been operating in Singapore’s market.

2. Equipment Quality and Transparency (15% weighting)

Does the company use Tier-1 solar panels from established manufacturers? Do they offer panel-level optimisers as standard or charge extra? Is the inverter from a reputable brand with proven reliability in tropical climates? The top solar companies are completely transparent about exactly which brands and models they install — and why they chose them. For a detailed breakdown of equipment, read our expert guide to the best solar panels in Singapore.

3. Warranty and After-Sales Coverage (20% weighting)

This is the single most heavily weighted criterion — and for good reason. Solar panels last 25 to 30 years, but workmanship warranties from many installers last only 1 to 5 years. A top solar company backs its work for the long term because it is confident in the quality of its installations. We evaluate panel warranties, inverter warranties, workmanship warranties, roof leak guarantees, and whether maintenance is included or an expensive add-on.

4. Pricing Transparency (10% weighting)

Can the company provide a fully itemised quote that breaks down every cost — panels, inverters, optimisers, mounting, electrical work, permits, monitoring, maintenance? Or do they give you a lump-sum number and hope you do not ask questions? Transparent pricing is a hallmark of confidence. Be aware of the hidden costs of cheaper solar options.

5. Financial Stability (10% weighting)

Your solar system should outlast your installer’s business. If the company folds in year 5, your workmanship warranty, maintenance, and monitoring vanish. We look at years in business, revenue trajectory, parent company backing, and overall financial health. Read our analysis on what happens if your solar company goes out of business.

6. Customer Reviews and Reputation (10% weighting)

Google Reviews with a minimum of 50 reviews and a 4.5+ star rating. We also look at consistency — a company with 200 five-star reviews but several one-star reviews about the same issue (e.g., poor after-sales) reveals a pattern. We cross-reference Google Reviews, Facebook, and HardwareZone forums.

7. Licensing and Certifications (10% weighting)

Every residential solar installation in Singapore must be designed and approved by a Licensed Electrical Worker (LEW) who is registered with the Energy Market Authority. The installer should also be registered with SP Group under the Enhanced Central Intermediary Scheme (ECIS) to handle grid connection applications on your behalf. Residential solar systems below 1 MWac — which includes all home installations — are exempted from generation licensing. Additional certifications such as BCA, bizSAFE, and ISO standards demonstrate higher operational and safety standards.

8. Innovation and Service Model (10% weighting)

Is the company advancing the industry with new service models, subscription options, performance guarantees, or technology integration? Or are they doing the same thing every other installer does? The top solar companies in Singapore are pushing boundaries to give homeowners more value, more protection, and more flexibility.

The Top Solar Companies in Singapore 2026: Our Ranking

Based on our 8-point framework, here are the top solar companies operating in Singapore’s residential market in 2026, with detailed profiles and honest assessments.

1. Sunollo — The Premium Standard-Setter

Overall Score: 9.4 / 10

Sunollo has fundamentally changed what homeowners should expect from a solar company in Singapore. With over 80,000 solar panels installed, 12,000+ households served, and more than 52 GWh of clean energy produced, their track record speaks volumes. But it is what they include as standard that puts them at the top.

What makes Sunollo the top solar company in Singapore:

• SunolloCare programme — A 25-year comprehensive coverage programme that includes maintenance, monitoring, insurance, and performance guarantee. No other installer in Singapore offers this level of long-term protection as a standard inclusion.
• Panel-level optimisers as standard — Every Sunollo installation includes SunMax power optimisers at no extra charge. Most competitors either skip optimisers entirely or charge S$200 to S$350 per panel extra. Optimisers ensure each panel produces independently, maximising output even with partial shading from nearby trees, antennas, or adjacent buildings.
• Full system insurance included — Weather damage, theft, fire, and electrical faults are all covered. Other companies either do not offer insurance or charge separately for it.
• Savings guarantee with rebate — If your system underperforms Sunollo’s projections, you receive a financial rebate. This is an extraordinary commitment that no other Singapore solar company matches. See exactly how the Sunollo Savings Guarantee works.
• Flexible payment options — Purchase outright (S$1,000 to S$1,200 per kWp all-inclusive) or subscribe with S$0 upfront from S$99 to S$199 per month. Both options include full SunolloCare coverage.
• AIKO ABC N-Type technology — Sunollo uses AIKO’s All Back Contact panels, which are among the most advanced residential solar panels available, delivering higher efficiency per square metre than standard PERC panels. Learn more about AIKO ABC N-Type technology.
• Comprehensive battery range — Five battery brands available (Tesla, BYD, Huawei, Enphase, Sigenergy) from S$5,000 to S$12,000, all covered under SunolloCare insurance. See our complete home battery storage guide.

Pricing: S$1,000 to S$1,200 per kWp (all-inclusive: panels, optimisers, inverter, mounting, electrical work, permits, monitoring, SunolloCare, and insurance). A 10 kWp system for a semi-detached home costs approximately S$10,000 to S$12,000.

Best for: Homeowners who want the most comprehensive protection, the highest-quality equipment, and guaranteed savings over 25 years. Ideal for landed properties of all types — terrace houses, semi-detached homes, and Good Class Bungalows.

Potential drawback: Not the cheapest upfront cost on the market. But when you factor in optimisers, 25-year SunolloCare, insurance, and the savings guarantee — all included in the price — Sunollo offers the strongest total value over the system’s lifetime.

The Leadership Behind Sunollo

Choosing a solar company is a 25-year decision. The people running the company matter as much as the product. Sunollo’s founding team brings institutional-grade credentials from ENGIE, Airbus, Procter & Gamble, and DFI Retail Group:

• Kapil Seth — Co-Founder: VP of Renewables & Sustainability at Meranti Green Steel and former Chairman & CEO of Mandalay Yoma Energy — a joint venture with ENGIE that became Myanmar’s largest decentralised solar company, delivering electricity to nearly 50,000 consumers. Speaker at the Asia Clean Energy Summit (ACES), FIND Global Summit, and ESG & Sustainability Strategy Asia Summit. Featured by Mediacorp 8world News as a solar safety expert.
• Nathalie Risteau — Co-Founder & CEO: 16+ years across renewable energy, aerospace, and international business. Former head of Airbus Helicopters for Myanmar, Cambodia, and Laos. Co-founded Mandalay Yoma Energy with ENGIE, electrifying 50,000 consumers via solar mini-grids. Speaker at the ADB Clean Energy Forum and French Chamber of Commerce Singapore. YPO member. Master’s in Strategy & International Business, Aston University (UK).
• Ankur Sawhney — Chief Commercial Officer: Former Group People & Culture Director at DFI Retail Group (7-Eleven) and Director HR at Procter & Gamble across Asia. Brings large-scale operational discipline to Sunollo’s commercial expansion.
• Adithya Panjala — Chief Technology Officer: 12+ years at Procter & Gamble as Senior Brand Director, Haircare Asia Pacific. P&L owner for billion-dollar franchises. Brings data-driven brand and performance management to Sunollo’s technology and growth strategy.

This is the team you are choosing when you go solar with Sunollo. They built a 50,000-consumer solar company with ENGIE before founding Sunollo. They have been quoted in The Straits Times, covered by pv magazine and PV Tech, and spoken at ADB and ACES. That is not a sales brochure. It is a documented track record.

2. GetSolar — Strong Rent-to-Own Pioneer

Overall Score: 7.8 / 10

GetSolar, backed by global energy giant ENGIE, was among the first in Singapore to offer zero-upfront-cost rent-to-own solar panels. They have completed over 450 solar projects and are a solid option for homeowners prioritising minimal initial outlay.

Strengths:

• Zero-upfront-cost rent-to-own model
• Backed by ENGIE (strong financial stability)
• Up to 30-year product warranty on panels
• Growing residential portfolio

Considerations:

• Optimisers not always included as standard — check your quote carefully
• Some customers report quotes provided without GST, making comparisons tricky
• After-sales coverage not as comprehensive as SunolloCare
• Limited battery brand options compared to premium installers

Best for: Budget-conscious homeowners who want to start saving on electricity immediately with zero upfront cost and are comfortable with a rent-to-own model.

3. PMCE Solar — Volume Leader with Personalised Service

Overall Score: 7.5 / 10

PMCE Solar started as a solar panel and inverter distributor before expanding into full installation services. With over 1,000 completed projects and a 4.9-star Google Reviews rating, they have built a solid reputation through high volumes and dedicated project management.

Strengths:

• Over 1,000 completed projects
• Excellent Google Reviews (4.9/5)
• Dedicated point-of-contact for each project
• Available 7 days a week

Considerations:

• Booking appointments can be challenging due to high demand
• Workmanship warranty period should be confirmed (varies by contract)
• Comprehensive after-sales programme details less publicly documented
• Insurance and performance guarantee not standard inclusions

Best for: Homeowners who value high-volume experience and personal project management, and who are comfortable with potentially less comprehensive long-term coverage.

4. Union Energy — Decades of Industry Experience

Overall Score: 7.3 / 10

Operating since 1977, Union Energy is one of Singapore’s longest-running energy companies. They transitioned from traditional energy products to renewable energy and have completed over 20,000 projects across residential and commercial sectors.

Strengths:

• Nearly five decades in business — exceptional longevity
• Over 20,000 projects completed (residential and commercial combined)
• Customised solar panel solutions
• Strong Google Reviews (5.0 average)

Considerations:

• Appointment scheduling can be difficult due to demand
• Commercial focus may mean residential is not their primary expertise
• Less innovation in service models (no subscription, no savings guarantee)
• After-sales and long-term maintenance programmes less prominent

Best for: Homeowners who prioritise company longevity and track record above all else, and are comfortable managing their own after-sales needs.

5. Utica Solar — 24/7 Operations and Technical Depth

Overall Score: 7.1 / 10

Utica Solar brings over 20 years of solar installation experience with strong technical certifications including ISO 9001, TUV OHSAS 18001, BizSAFE Star, and BCA. Their expertise extends to microgrid and off-grid systems.

Strengths:

• 20+ years of industry experience
• Multiple certifications (ISO, BizSAFE Star, BCA)
• 24/7 operations
• Microgrid and off-grid capability

Considerations:

• Some customers report slow response times via messaging platforms
• Pricing information not publicly transparent
• Long-term maintenance programme details less clear
• Insurance and performance guarantees not prominently featured

Best for: Homeowners with complex technical requirements, off-grid ambitions, or unusual roof configurations that benefit from deep technical expertise.

6. Fomo Energy — Accessible Entry Point

Overall Score: 6.8 / 10

Fomo Energy, backed by Senoko Energy, focuses on making solar accessible through rent-to-own programmes with zero upfront costs. They are a newer entrant with approximately 200 completed projects.

Strengths:

• Zero-upfront rent-to-own model
• Backed by Senoko Energy
• Up to 25-year performance warranty
• Maintenance packages available

Considerations:

• Relatively new — fewer than 200 completed projects
• 5-year workmanship warranty (shorter than premium competitors)
• Less established track record for long-term reliability assessment
• Limited equipment brand options

Best for: Homeowners attracted to zero-upfront-cost models who are comfortable with a newer company backed by a major energy provider.

Head-to-Head: How the Top Solar Companies Compare

Numbers tell the story more clearly than marketing copy. Here is how the top solar companies in Singapore stack up across the criteria that matter most.

Warranty and Coverage Comparison

Among the companies we reviewed, GetSolar stands out among rent-to-own providers with up to 30-year panel warranties. PMCE Solar leads in project volume with over 1,000 completions. Union Energy offers unmatched longevity at nearly five decades. But only Sunollo combines every coverage element — workmanship, maintenance, insurance, and performance guarantee — into a single all-inclusive package.

Pricing and Value Comparison

When you calculate the true 25-year cost of ownership — not just the upfront price — Sunollo is often the most cost-effective option despite appearing more expensive at first glance. The budget installer’s S$7,000 system actually costs S$19,500 to S$34,500 once you add the missing optimisers, maintenance, and insurance over 25 years. Learn why total cost of ownership (TCO) is the only fair comparison metric.

Equipment Comparison

For an in-depth equipment analysis, read our guide on choosing the best solar products for your home.

What Separates Singapore’s Top Solar Companies from the Rest

After evaluating dozens of companies, clear patterns emerge. The top solar companies in Singapore share several characteristics that the rest simply do not.

They Think in Decades, Not Transactions

A budget installer’s relationship with you ends the day the installation is complete. Maybe they answer a phone call in year one. By year three, good luck getting a response. By year five, there is a reasonable chance they no longer exist.

The top solar companies design their entire business model around a 25-year relationship. That is why SunolloCare exists — it aligns the company’s interests with yours for the entire lifespan of the system. When your installer is responsible for your system’s performance for 25 years, they have every incentive to install it perfectly from day one.

They Include What Others Charge Extra For

Panel-level optimisers are the most obvious example. These devices allow each panel to produce energy independently, so one shaded panel does not drag down your entire string. In Singapore, where trees, antennas, water tanks, and adjacent buildings frequently cause partial shading, optimisers can improve total system output by 5% to 25%.

Most installers either skip optimisers entirely (losing you thousands of dollars in energy production over 25 years) or charge S$200 to S$350 per panel as an add-on. For a 20-panel system, that is S$4,000 to S$7,000 extra. Sunollo includes them as standard in every installation.

They Guarantee Their Projections

Any solar company can project impressive savings on a glossy proposal. But will they put their money where their mouth is? A savings guarantee with a financial rebate for underperformance is the ultimate test of confidence. Only companies that use premium equipment, expert installation techniques, and conservative (honest) projections can afford to offer this.

They Are Transparent About Everything

Ask a top solar company any question — about pricing, equipment, warranty terms, expected production, or potential risks — and you will get a clear, detailed answer. Ask a lesser company the same questions and you will get vague responses, deflections, or pressure to “sign today before the price goes up.”

The Singapore Solar Market in 2026: Why Choosing the Right Company Matters More Than Ever

Understanding the broader market context helps explain why your choice of solar company is so consequential right now.

Electricity Prices Continue to Climb

Singapore’s electricity tariffs have been volatile, driven by global natural gas prices and geopolitical uncertainty. As of early 2026, residential tariffs remain significantly above historical averages. Every quarter that passes without solar panels on your roof is money lost to the grid. For a deeper analysis, read is solar worth it in Singapore 2026.

Government Targets Create Urgency

The Singapore Green Plan 2030 targets at least 2 GWp of solar deployment. The government is actively encouraging residential solar adoption through the Net Energy Regulation (NER) framework, which allows homeowners to sell excess solar energy back to the grid, effectively running their electricity meter backwards. See our complete guide to solar incentives and green financing.

More Companies Means More Risk

The growing market has attracted dozens of new installers, many with limited experience, thin margins, and uncertain longevity. While competition generally benefits consumers, in the solar industry it creates a specific risk: you might save S$2,000 upfront by choosing a newer, cheaper installer, only to lose S$10,000+ in value when they cannot honour their warranty, their equipment underperforms, or they simply cease operations.

Technology Is Advancing Rapidly

The move from PERC to N-Type and All Back Contact (ABC) panel technology represents a genuine generational leap. Panels today are more efficient, more durable, and better suited to Singapore’s hot, humid climate. But only the top solar companies stay current with these advances and pass the benefits to homeowners. Read about the latest in AIKO ABC N-Type solar panel technology.

Equipment and Technology: What the Top Solar Companies in Singapore Use

The panels on your roof will be there for 25 to 30 years. The technology choice you make today determines your energy production, savings, and system reliability for decades. Here is what to look for.

Solar Panel Technology Tiers

In Singapore’s tropical climate, where rooftop temperatures regularly exceed 60°C, temperature performance and degradation rate matter enormously. ABC and HJT panels handle heat significantly better than PERC technology. A panel that degrades 0.25% per year versus 0.7% per year produces significantly more energy over its 25-year life — potentially tens of thousands of kWh more.

Why Optimisers Matter in Singapore

Singapore’s urban environment creates unavoidable shading challenges. Neighbouring buildings, trees (especially heritage trees that cannot be trimmed), water tanks, antennas, and even passing clouds affect panel output.

Without optimisers, panels connected in a string perform only as well as the weakest panel. One shaded panel can reduce the output of 10 connected panels. With panel-level optimisers, each panel operates independently. The shaded panel produces less, but every other panel continues at full capacity.

For Singapore homes specifically, optimisers are not a luxury — they are a necessity for maximising your return on investment. Understanding how many solar panels you need is also critical for proper system sizing.

Inverter Selection Matters

The inverter converts your panels’ DC output to usable AC electricity. A failing inverter means zero production until it is replaced. The top solar companies in Singapore use inverters from established brands with proven reliability records:

• Sungrow — Excellent value, strong performance in tropical climates, widely used in Singapore
• Huawei — Advanced monitoring and AI-driven optimisation
• Enphase — Microinverters that provide panel-level independence
• SolarEdge — Integrated optimiser and inverter ecosystem
• GoodWe — Reliable mid-range option with good Singapore support

Warranty and After-Sales: The True Test of a Top Solar Company

Marketing brochures look impressive. Warranty documents tell the truth. This section examines what happens after the installation team leaves your property — because that is when the real test of a top solar company begins.

The Warranty Gap Nobody Talks About

Almost every solar company advertises a “25-year panel warranty.” This is the manufacturer’s warranty on the panels themselves. It is not the installer’s warranty.

The critical warranty is the workmanship warranty — this covers the installation itself: wiring, mounting, waterproofing, electrical connections, and everything the installer’s team touched. If a cable degrades, a mounting bracket corrodes, a junction box overheats, or your roof leaks at a mounting point, it is the workmanship warranty that covers the repair.

Here is the uncomfortable truth: most installers offer only 1 to 5 years of workmanship warranty. After that, you are on your own for any installation-related issues — and those issues often do not manifest until years 5 to 15, precisely when most workmanship warranties have expired.

A truly top solar company offers 10 to 25 years of workmanship warranty because they are confident their installation will last. SunolloCare provides this as standard. Learn more about annual solar system performance testing.

Maintenance: The Silent Savings Killer

Solar panels are often marketed as “maintenance-free.” This is dangerously misleading. While panels have no moving parts, they are exposed to Singapore’s harsh tropical environment 24/7/365:

• Panel soiling from dust, pollen, bird droppings, and tree sap reduces output by 5% to 15% annually if not cleaned
• Inverter faults can go undetected for months without proactive monitoring
• Cable degradation from UV exposure and humidity is a slow but serious risk
• Mounting corrosion is inevitable if galvanised steel (rather than aluminium with stainless steel hardware) was used
• Junction box failures can create hotspots and reduce panel output

Without regular professional maintenance, your system’s output degrades faster than it should, silently costing you hundreds or thousands of dollars per year. See our article on why your solar system may produce less than projected.

The top solar companies include ongoing maintenance in their service. Sunollo’s SunolloCare includes quarterly remote performance analysis, bi-annual physical inspection and cleaning, proactive fault detection, and 24/7 emergency response for the full 25-year system life.

Insurance: Protection Against the Unexpected

Singapore experiences heavy tropical storms, occasional lightning strikes, and increasingly severe weather events. A falling tree branch, a lightning surge, or a water intrusion event can damage your solar system — potentially costing S$2,000 to S$10,000+ to repair.

Most solar companies do not include system insurance. This means you are either unprotected or need to arrange (and pay for) separate coverage. Sunollo includes full system insurance covering weather damage, theft, fire, and electrical faults as part of every installation.

Pricing Transparency: What You Should Expect to Pay in Singapore

Solar pricing in Singapore varies significantly depending on system size, equipment quality, and what is included. Here is an honest breakdown so you can evaluate quotes like an expert.

Typical Pricing by Property Type

The critical difference: the “Typical Price Range” column reflects quotes from budget and mid-range installers, which usually exclude optimisers, long-term maintenance, insurance, and comprehensive monitoring. Sunollo’s all-inclusive pricing includes every one of these items. When you add the missing essentials to a budget quote, the total 25-year cost typically exceeds Sunollo’s all-inclusive price. For detailed pricing by property type, see our complete solar panel cost guide.

What “All-Inclusive” Should Mean

When a top solar company says “all-inclusive,” every one of these items should be covered in the quoted price:

• Solar panels (specified brand and model)
• Panel-level optimisers
• Inverter (specified brand and model)
• Mounting system (aluminium with stainless steel hardware)
• All electrical work and cabling (SS 638 compliant)
• SP Group and all regulatory permit applications
• System commissioning and grid connection
• WiFi-connected monitoring system with app
• Workmanship warranty (minimum 10 years)
• Ongoing maintenance programme
• System insurance
• Performance guarantee

If any of these are missing from your quote, you are not comparing like for like.

Subscription vs Purchase: Which Is Right for You?

12 Red Flags That Disqualify a Solar Company from “Top” Status

Not every company deserves to be called top. Here are the warning signs that should immediately disqualify an installer from your consideration.

1. “This price is only available today” — Legitimate companies do not use high-pressure tactics. Solar is a 25-year decision; any company rushing you does not have your interests at heart.
2. Refuses to itemise the quote — If they will not break down costs for panels, inverters, optimisers, mounting, electrical work, and permits, they are hiding something.
3. Uses unknown or “house brand” panels — If you cannot find independent reviews and specifications for the panel brand, do not install it on your roof for 25 years.
4. Workmanship warranty under 5 years — This tells you the company does not trust its own installation quality to last.
5. No monitoring system included — Without monitoring, you have no way to know if your system is underperforming until you see an unexpectedly high electricity bill months later.
6. No physical office in Singapore — If you cannot visit their office, how will you find them when you need warranty service in year 8?
7. Quote below S$800 per kWp — Market rate is S$900 to S$1,200 per kWp. Anything significantly below means corners are being cut on equipment, labour, or warranty coverage.
8. Cannot provide local references — A company with hundreds of happy customers should easily provide 3 to 5 references you can contact directly.
9. Subcontracts all installation work — When the installer does not control the installation crew, quality control is impossible to guarantee.
10. No written contract before starting work — Everything — every component, every warranty term, every cost — must be documented in a signed contract before any work begins.
11. Quotes optimisers as “not needed” for Singapore homes — Given Singapore’s urban shading environment, this shows either ignorance or cost-cutting at your expense.
12. No clear answer on what happens when they go out of business — A top solar company has succession planning, insurance backing, or parent company guarantees. If they dismiss the question, they have not planned for it.

20 Questions to Ask Before Choosing Your Solar Company

Walk into any solar consultation armed with these questions. The quality of the answers — and the willingness to answer them at all — tells you everything about whether you are dealing with a top solar company or a sales-focused operation. Review our comprehensive list of essential questions to ask your solar installer.

1. What specific panel brand, model, and technology (PERC, TOPCon, HJT, or ABC) will you install?
2. What inverter brand and model? String inverter, micro-inverter, or hybrid?
3. Are panel-level optimisers included in the quoted price? If not, what is the additional cost?
4. What is your workmanship warranty period? Is it documented in the contract?
5. Is ongoing maintenance included? For how many years? What does it cover?
6. Is the system insured? Against what risks? Who is the insurer?
7. Do you offer a savings or performance guarantee? What happens if the system underperforms?
8. How do you handle roof leaks caused by the installation? For how long?
9. Do you have Licensed Electrical Workers (LEWs) on your team? Are they registered with EMA?
10. How many residential systems have you installed in Singapore specifically?
11. Can I speak directly to 3 to 5 past customers with systems installed at least 2 years ago?
12. What annual production (kWh) do you project for my system? What assumptions is that based on?
13. Do you handle all permits and applications — SP Group, BCA, and all regulatory approvals? Is this included in the price?
14. What monitoring system is included? Is it WiFi-connected with a mobile app?
15. What is your warranty claims process? What is the typical response time?
16. What mounting material do you use — aluminium or galvanised steel?
17. Is your cabling SS 638 compliant?
18. What is your company’s financial backing? How long have you been profitable?
19. Do you offer both purchase and subscription options? What is included in each?
20. What battery brands do you offer? Are they covered under your warranty and insurance?

The Total Cost of Ownership: Why Upfront Price Is Misleading

This is the most important financial concept in solar — and the one most buyers get wrong.

When comparing solar quotes, most homeowners look at the upfront price. Company A quotes S$8,000 and Company B quotes S$11,000. Company A seems S$3,000 cheaper. But Company A’s price does not include optimisers (S$4,000 to S$7,000 value), only has a 2-year workmanship warranty (versus 25 years), does not include maintenance (S$200 to S$500 per year for 25 years = S$5,000 to S$12,500), and does not include insurance (S$300 to S$600 per year = S$7,500 to S$15,000).

When you add the true costs over 25 years, Company A’s “S$8,000 system” actually costs S$24,500 to S$42,500. Company B at S$11,000 all-inclusive is dramatically better value.

This is not hypothetical — it is the reality that plays out across Singapore’s solar market every day. The top solar companies are transparent about total cost of ownership because they know their value proposition strengthens the more closely you examine it.

Frequently Asked Questions

What is the top solar company in Singapore in 2026?

Based on our comprehensive evaluation across installation track record, equipment quality, warranty coverage, pricing transparency, financial stability, customer reviews, licensing, and innovation, Sunollo ranks as the top solar company in Singapore for 2026. Their combination of SunolloCare (25-year coverage), included optimisers, system insurance, and savings guarantee is unmatched in the market.

How much does solar cost in Singapore in 2026?

Residential solar in Singapore costs S$900 to S$1,200 per kWp from reputable installers. A typical terrace house system (5 to 8 kWp) costs S$5,000 to S$9,600, while a semi-detached system (10 to 15 kWp) costs S$10,000 to S$18,000. Sunollo also offers S$0 upfront subscription plans starting from S$99 per month. For detailed pricing, see our solar panel cost guide.

Is solar worth it in Singapore?

Yes. With electricity prices above 30 cents per kWh and Singapore receiving 4 to 5 peak sun hours daily, most landed homes achieve payback in 3 to 5 years with 20+ years of pure savings afterwards. A well-designed system can offset 60% to 100% of your electricity consumption. Read our detailed financial analysis of solar in Singapore 2026.

What is the difference between “top” and “cheapest” solar companies?

The cheapest solar companies minimise upfront cost by using lower-quality equipment, skipping optimisers, offering minimal warranties (1 to 2 years), and providing no after-sales service. The top solar companies invest in premium equipment, include comprehensive long-term coverage, and back their systems with guarantees. Over 25 years, the “cheapest” option typically costs more due to reduced energy production, repair costs, and missing coverage.

Should I choose a solar company based on Google Reviews alone?

Google Reviews are an important data point but not sufficient alone. Many reviews focus on the installation experience (a few days) rather than long-term system performance and after-sales service (25 years). Look for reviews from customers with systems installed 2+ years ago, and check for patterns in complaints about after-sales service.

How long do solar panels last in Singapore?

Quality solar panels last 25 to 30 years in Singapore’s tropical climate. However, performance degrades over time. Premium panels (N-Type, ABC technology) degrade at 0.25% to 0.4% per year, while budget panels degrade at 0.5% to 0.7% per year. After 25 years, premium panels still produce approximately 90% of their original output versus 82% for budget panels — a significant difference in cumulative energy production.

Do I need optimisers for solar panels in Singapore?

In most cases, yes. Singapore’s dense urban environment means partial shading from neighbouring buildings, trees, antennas, and water tanks is extremely common. Without optimisers, one shaded panel can reduce the output of an entire string of 8 to 12 panels. Sunollo includes panel-level optimisers as standard on every installation.

What happens if my solar company goes out of business?

If your installer ceases operations, your panel manufacturer warranty remains valid, but your workmanship warranty, maintenance, monitoring, and insurance all stop. This is why financial stability is a critical evaluation criterion. Sunollo’s SunolloCare is backed by insurance to ensure coverage continues regardless. Read our detailed guide on this topic.

Can I install solar on an HDB flat in Singapore?

Individual HDB flat owners cannot install private solar panels, as the roof is common property managed by the Town Council. However, you benefit indirectly through the SolarNova programme, which installs solar on HDB rooftops. For landed homeowners, solar is fully available and increasingly popular. See our HDB solar guide.

Does a solar installer need a licence in Singapore?

Residential solar systems below 1 MWac — which includes all home installations — are exempted from generation licensing in Singapore. However, every solar installation must be designed and approved by a Licensed Electrical Worker (LEW) registered with the Energy Market Authority. Your installer should also be registered with SP Group under the Enhanced Central Intermediary Scheme (ECIS) to handle your grid connection application. Ask to see LEW credentials and SP Group registration before signing any contract.

What is the best time to install solar panels in Singapore?

There is no “bad” time to install solar in Singapore due to consistent year-round sunlight. However, installing sooner is better financially — every month without solar is a month of full electricity bills. The process from enquiry to grid-connected system typically takes 6 to 10 weeks, so planning 2 to 3 months ahead is advisable.

How much can I save with solar panels in Singapore?

Depending on your consumption, system size, and orientation, most landed homeowners save S$200 to S$800 per month on electricity bills. Over 25 years, total savings typically range from S$60,000 to S$240,000. Sunollo’s savings guarantee ensures you achieve the projected savings or receive a rebate. For a detailed analysis, see how to save electricity in Singapore 2026.

Your Next Step: Get a Free Assessment from the Top Solar Company in Singapore

You have read 5,000+ words about what makes a solar company genuinely “top” in Singapore. You now know the evaluation framework, the comparison criteria, the red flags, and the questions to ask. The next step is simple.

Start with a free solar assessment from Sunollo. Our energy experts will:

• Analyse your roof’s solar potential using satellite imagery and on-site assessment
• Design a custom system with AIKO ABC panels and SunMax optimisers sized to your consumption
• Provide fully transparent, itemised pricing at S$1,000 to S$1,200 per kWp — all-inclusive
• Show you exactly what you will save each month and each year — guaranteed
• Explain both purchase and S$0-upfront subscription options with full SunolloCare coverage

Get Your Free Solar Assessment

Or explore our solar plans and pricing to compare subscription and purchase options.

For a curated collection of installer evaluation and due diligence guides, see our solar company selection resources hub. For more information on solar costs, visit our solar panel cost resources page.