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 3 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.
- Full system insurance included — Weather damage, theft, fire, and electrical faults are all covered.
- Savings guarantee with rebate — If your system underperforms Sunollo's projections, you receive a financial rebate. 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.
- AIKO ABC N-Type technology — Sunollo uses AIKO's All Back Contact 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. See our complete home battery storage guide.
Pricing: S$1,000 to S$1,200 per kWp all-inclusive. A 10 kWp system 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 terrace houses, semi-detached homes, and Good Class Bungalows.
Potential drawback: Not the cheapest upfront cost. But when you factor in optimisers, 25-year SunolloCare, insurance, and the savings guarantee — all included — Sunollo offers the strongest total value over the system's lifetime.
2. GetSolar — Making solar simple
Overall Score: 7.8 / 10
GetSolar was among the first in Singapore to offer zero-upfront-cost rent-to-own solar panels. They claim to have completed over 450 solar projects.
Strengths:
- Zero-upfront-cost rent-to-own mode
- Up to 30-year product warranty on panels
- Growing residential portfolio
Considerations:
- Optimisers not always included as standard
- Some customers report quotes provided without GST
- After-sales coverage not as comprehensive as SunolloCare
- Limited battery brand options
Best for: Budget-conscious homeowners who want zero upfront cost and are comfortable with a rent-to-own model.
3. PMCE Solar — Personalised Service
Overall Score: 7.5 / 10
PMCE Solar started as a distributor before expanding into full installation services.Over 1,000 completed projects and a 4.9-star Google Reviews rating.
Strengths:
- Excellent Google Reviews (4.9/5)
- Dedicated point-of-contact for each project
- Available 7 days a week
Considerations:
- Booking appointments can be challenging
- Workmanship warranty period varies by contract
- After-sales programme details less publicly documented
- Insurance and performance guarantee not standard
Best for: Homeowners who value high-volume experience and personal project management.
4. Union Energy — Decades of Gas Experience
Overall Score: 7.3 / 10
Operating since 1977, Union Energy is one of Singapore's longest-running energy companies
Strengths:
- Nearly five decades in business
- Customised solar panel solutions
Considerations:
- Appointment scheduling can be difficult
- Commercial focus may mean residential is not primary expertise
- Less innovation in service models
- Long-term maintenance programmes less prominent
Best for: Homeowners who prioritise company longevity and track record above all else.
5. Utica Solar — Operations Focus
Overall Score: 7.1 / 10
Over 20 years of experience with certifications including ISO 9001, TUV OHSAS 18001, BizSAFE Star, and BCA. Expertise in microgrid and off-grid systems.
Strengths:
- 20+ years of industry experience
- Multiple certifications
- 24/7 operations
- Microgrid and off-grid capability
Considerations:
- Some customers report slow response times
- Pricing not publicly transparent
- Maintenance programme details less clear
- Insurance and guarantees not prominently featured
Best for: Homeowners with complex technical requirements or unusual roof configurations.
6. Fomo Energy — Accessible Entry Point
Overall Score: 6.8 / 10
Focuses on rent-to-own programmes with zero upfront costs. Approximately 200 completed projects.
Strengths:
- Zero-upfront rent-to-own model
- Up to 25-year performance warranty
- Maintenance packages available
Considerations:
- Fewer than 200 completed projects
- 5-year workmanship warranty
- Less established track record
- Limited equipment brand options
Best for: Homeowners attracted to zero-upfront-cost models backed by a major energy provider.
Head-to-Head: How the Top Solar Companies Compare
Numbers tell the story more clearly than marketing copy.
Warranty and Coverage Comparison
CoverageBudget InstallersMid-Range InstallersSunollo (Premium)Panel warranty25 years (manufacturer)25 years (manufacturer)25 years (manufacturer + installer-backed)Inverter warranty5 years5 to 10 years10 to 15 yearsWorkmanship warranty1 to 2 years5 years10 to 25 years (SunolloCare)Roof leak guaranteeNone or 1 year5 years25 yearsMaintenance includedNoFirst year onlyFull 25 years (SunolloCare)System insuranceNoRarelyFull coverage includedPerformance guaranteeNoNoYes (rebate if underperforming)MonitoringBasic or noneApp-based24/7 proactive with alerts
Among the companies we reviewed, GetSolar stands out with up to 30-year panel warranties. PMCE Solar leads in 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
FactorBudget InstallersMid-Range InstallersSunollo (Premium)Price per kWpS$700 to S$900S$900 to S$1,200S$1,000 to S$1,200Optimisers includedNoExtra costYes — standard25-year maintenanceNo (S$200 to S$500/year extra)1 to 5 years onlyYes — includedSystem insuranceNo (S$300 to S$600/year extra)RarelyYes — includedSavings guaranteeNoNoYes — rebate if not metTrue 25-year cost (10 kWp)S$19,500 to S$34,500S$14,000 to S$24,000S$10,000 to S$12,000
When you calculate the true 25-year cost of ownership, Sunollo is often the most cost-effective option despite appearing more expensive at first glance. Learn why total cost of ownership (TCO) is the only fair comparison metric.
Equipment Comparison
ComponentWhat Top Companies UseWhat to Watch Out ForSolar panelsTier-1: LONGi, REC, Jinko, Trina, Canadian Solar, AIKOUnknown or house brand panelsInverterHuawei, Enphase, SolarEdge, GoodWe, SungrowNo-name or unbranded invertersOptimisersSunMax, SolarEdge, Enphase micro-invertersTold not needed or expensive add-onMounting systemAluminium rails with stainless steel hardwareGalvanised steel (corrodes in humidity)MonitoringWiFi-connected app with real-time alertsCheck the inverter display manuallyCablingSS 638 compliant, UV-resistantNon-compliant or undersized cables
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.
They Include What Others Charge Extra For
Panel-level optimisers are the most obvious example. 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 or charge S$200 to S$350 per panel extra. For a 20-panel system, that is S$4,000 to S$7,000 extra. Sunollo includes them as standard.
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.
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 and you will get vague responses, deflections, or pressure to sign today.
The Singapore Solar Market in 2026
Electricity Prices Continue to Climb
Singapore's electricity tariffs have been volatile, driven by global natural gas prices and geopolitical uncertainty. Every quarter that passes without solar panels on your roof is money lost to the grid. 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 encourages residential solar through the Net Energy Regulation (NER) framework, which allows homeowners to sell excess solar energy back to the grid. 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. 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.
Technology Is Advancing Rapidly
The move from PERC to N-Type and All Back Contact (ABC) panel technology represents a genuine generational leap. Read about AIKO ABC N-Type solar panel technology.
Equipment and Technology
Solar Panel Technology Tiers
TechnologyEfficiencyDegradation RateBest ForPERC (older standard)19% to 21%0.5% to 0.7% per yearBudget installationsTOPCon (N-Type)21% to 23%0.4% to 0.5% per yearMid-range installationsHJT (Heterojunction)22% to 24%0.3% to 0.4% per yearPremium installationsABC (All Back Contact)23% to 25%0.25% to 0.4% per yearMaximum output per sqm
In Singapore's tropical climate, where rooftop temperatures regularly exceed 60 degrees Celsius, temperature performance and degradation rate matter enormously. ABC and HJT panels handle heat significantly better than PERC technology.
Why Optimisers Matter in Singapore
Singapore's urban environment creates unavoidable shading challenges. 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. 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. The top solar companies use:
- Sungrow — Excellent value, strong tropical performance
- Huawei — Advanced monitoring and AI-driven optimisation
- Enphase — Microinverters for panel-level independence
- SolarEdge — Integrated optimiser and inverter ecosystem
- GoodWe — Reliable mid-range option
Warranty and After-Sales: The True Test
The Warranty Gap Nobody Talks About
The critical warranty is the workmanship warranty — this covers the installation itself: wiring, mounting, waterproofing, electrical connections. Most installers offer only 1 to 5 years. A truly top solar company offers 10 to 25 years. 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:
- Panel soiling reduces output by 5% to 15% annually if not cleaned
- Inverter faults can go undetected for months
- Cable degradation from UV exposure and humidity
- Mounting corrosion if galvanised steel was used
- Junction box failures can create hotspots
Sunollo's SunolloCare includes quarterly remote performance analysis, bi-annual inspection and cleaning, proactive fault detection, and 24/7 emergency response. See why your solar system may produce less than projected.
Insurance: Protection Against the Unexpected
Singapore experiences heavy tropical storms and lightning strikes. Sunollo includes full system insurance covering weather damage, theft, fire, and electrical faults as part of every installation.
Pricing Transparency
Typical Pricing by Property Type
Property TypeSystem SizeTypical RangeSunollo All-InclusiveTerrace house4 to 8 kWpS$3,200 to S$9,600S$4,000 to S$9,600Semi-detached8 to 15 kWpS$6,400 to S$18,000S$8,000 to S$18,000Bungalow12 to 25 kWpS$9,600 to S$30,000S$12,000 to S$30,000GCB20 to 40+ kWpS$16,000 to S$48,000S$20,000 to S$48,000
The typical range usually excludes optimisers, long-term maintenance, insurance, and monitoring. Sunollo's pricing includes everything. See our complete solar panel cost guide.
What All-Inclusive Should Mean
- 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
Subscription vs Purchase
FactorSubscription (S$0 Upfront)Purchase (Cash or Loan)Upfront costS$0S$10,000 to S$48,000Monthly costS$99 to S$199S$0 (or loan repayments)When savings startMonth 1 (guaranteed)After payback (3 to 5 years)SunolloCare includedYes — 25 yearsYes — 25 yearsInsurance includedYesYesTotal 25-year savingsLower but guaranteed from day oneHigher but requires upfront capitalBest forRisk-averse, no upfront capitalHomeowners maximising long-term ROI
12 Red Flags That Disqualify a Solar Company
- This price is only available today — High-pressure tactics mean they do not have your interests at heart.
- Refuses to itemise the quote — They are hiding something.
- Uses unknown or house brand panels — Do not install unverifiable panels for 25 years.
- Workmanship warranty under 5 years — They do not trust their own installation quality.
- No monitoring system included — You will not know your system is underperforming.
- No physical office in Singapore — Good luck finding them for warranty service.
- Quote below S$800 per kWp — Corners are being cut on equipment or warranty.
- Cannot provide local references — They should easily provide 3 to 5 contacts.
- Subcontracts all installation work — Quality control is impossible to guarantee.
- No written contract before starting work — Everything must be documented before work begins.
- Quotes optimisers as not needed — This shows ignorance or cost-cutting.
- No clear answer on what happens if they go out of business — They have not planned for continuity.
20 Questions to Ask Before Choosing
Review our comprehensive list of essential questions to ask your solar installer.
- What specific panel brand, model, and technology will you install?
- What inverter brand and model? String, micro, or hybrid?
- Are panel-level optimisers included in the quoted price?
- What is your workmanship warranty period?
- Is ongoing maintenance included? For how many years?
- Is the system insured? Against what risks?
- Do you offer a savings or performance guarantee?
- How do you handle roof leaks from the installation?
- Do you have Licensed Electrical Workers (LEWs) on your team?
- How many residential systems have you installed in Singapore?
- Can I speak to 3 to 5 past customers?
- What annual production (kWh) do you project?
- Do you handle all permits — SP Group, BCA, and regulatory approvals?
- What monitoring system is included?
- What is your warranty claims process?
- What mounting material do you use?
- Is your cabling SS 638 compliant?
- What is your company's financial backing?
- Do you offer both purchase and subscription options?
- What battery brands do you offer?
The Total Cost of Ownership
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 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, does not include maintenance (S$5,000 to S$12,500 over 25 years), and does not include insurance (S$7,500 to S$15,000 over 25 years).
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.
Frequently Asked Questions
What is the top solar company in Singapore in 2026?
Based on our comprehensive evaluation, 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.
How much does solar cost in Singapore in 2026?
S$900 to S$1,200 per kWp from reputable installers. A terrace house system costs S$5,000 to S$9,600, a semi-detached system S$10,000 to S$18,000. S$0 upfront subscriptions from S$99 per month. See our solar panel cost guide.
Is solar worth it in Singapore?
Yes. Most landed homes achieve payback in 3 to 5 years with 20+ years of pure savings. A well-designed system can offset 60% to 100% of consumption. Read our financial analysis.
What is the difference between top and cheapest solar companies?
The cheapest minimise upfront cost by using lower-quality equipment, skipping optimisers, offering minimal warranties, and no after-sales service. Over 25 years, the cheapest option typically costs more.
Should I choose based on Google Reviews alone?
Google Reviews are important but not sufficient alone. Look for reviews from customers with systems installed 2+ years ago, and check for patterns in complaints.
How long do solar panels last in Singapore?
25 to 30 years. Premium panels degrade at 0.25% to 0.4% per year versus 0.5% to 0.7% for budget panels. After 25 years, premium panels still produce approximately 90% of original output versus 82% for budget panels.
Do I need optimisers for solar panels in Singapore?
In most cases, yes. Singapore's dense urban environment means partial shading is extremely common. Sunollo includes panel-level optimisers as standard.
What happens if my solar company goes out of business?
Your panel manufacturer warranty remains valid, but workmanship warranty, maintenance, monitoring, and insurance all stop. Sunollo's SunolloCare is backed by insurance. Read our detailed guide.
Can I install solar on an HDB flat?
Individual HDB flat owners cannot install private solar panels. For landed homeowners, solar is fully available. See our HDB solar guide.
Does a solar installer need a licence in Singapore?
Residential solar systems below 1 MWac are exempted from generation licensing. However, every installation must be designed and approved by a Licensed Electrical Worker (LEW) registered with EMA. Your installer should also be registered with SP Group under the ECIS scheme.
What is the best time to install solar panels?
There is no bad time due to consistent year-round sunlight. The process typically takes 6 to 10 weeks.
How much can I save with solar panels?
Most landed homeowners save S$200 to S$800 per month. Over 25 years, total savings typically range from S$60,000 to S$240,000. See how to save electricity in Singapore 2026.
Your Next Step
Start with a free solar assessment from Sunollo. Our energy experts will:
- Analyse your roof's solar potential
- Design a custom system with AIKO ABC panels and SunMax optimisers
- Provide transparent, itemised pricing at S$1,000 to S$1,200 per kWp
- Show you exactly what you will save — guaranteed
- Explain both purchase and S$0-upfront subscription options
Get Your Free Solar Assessment
Or explore our solar plans and pricing. For installer evaluation guides, see our solar company selection resources hub.
