SunolloA&A / NEW LANDED HOMESHow we install

FOR ARCHITECTS, INTERIOR DESIGNERS & CONTRACTORS

Solar for new
and renovated homes.

Sunollo can manage the full installation or work with your architect, interior designer and contractors.

For additions and alterations (A&A), new builds and completed landed homes.

01 Roof fixings 02 Cable routes
A Sunollo solar installation on a Singapore landed home, with panels following the roof slopes
SOLAR INSTALLATIONROOF · ROUTES · EQUIPMENT ZONE

01 / ROOF MOUNTING

Tile roof.
Plan the mounts early.

Replacing the tiles? Plan the solar mounts before the new tiles are laid.

Mount beneath the tiles.
Refit tiles. Fit rails.

© Sunollo

  1. 01

    Confirm the fixing.

    Sunollo and the roofer agree where mounts attach and how the roof stays watertight.

  2. 02

    Fit mounts before tiling.

    Where the approved roof detail allows, Sunollo fits the hooks or strips before tiling.

  3. 03

    Finish the roof. Add panels.

    The roofer refits tiles and weatherproofs the fixing points. Sunollo then fits rails and panels.

Avoid reopening a new roof.

Plan early so the roofer can finish around the mounts.

Early visits may cost extra for materials, delivery and labour. We agree costs before booking. Tell us if the roof plans change.

Roof already finished?

Share the roof plans and photos. We’ll check mounting and cable routes for the finished home.

02 / BEFORE WALLS & CEILINGS CLOSE

Plan the cable routes.

Confirm the routes before plastering or closing ceilings. Keep cable ends and connection points accessible.

Optional solar coordination interfaces; Sunollo can deliver all solar work directly If the homeowner chooses coordination, the contractor can prepare openings and separate containment routes: DC from roof to inverter, and AC from the isolator beside the inverter to the main distribution board. The DC route is empty for Sunollo to install the cables. The contractor can also supply and pull the AC cable from the isolator to the PV circuit protection at the board, to the approved cable and breaker schedule. Allow two-inch conduit diameter or casing width for planning; final containment capacity is confirmed for the project. The contractor may provide the selected AC isolator, PV MCB and RCCB at the board, or in an agreed enclosure beside it. Sunollo can instead deliver the entire solar installation, including all these routes and electrical provisions. This is an interface diagram, not a wiring diagram. E-01 / OPTIONAL SHARED WORKDIAGRAM · NOT TO SCALE PV MCBRCCB EMPTY DC ROUTEINVERTER CONNECTIONAC CABLE · ISOLATOR TO BOARD Roof arrayInverter positionAC isolatorMain distribution board Roof opening + empty DC routeAccessible cable endsBy Sunollo, or contractor if agreedAC cable to the approved specification
  1. 01 / ROOFSolar panelsEmpty DC route ↓
  2. 02 / EQUIPMENT ZONEInverterAC connection ↓
  3. 03 / BESIDE THE INVERTERAC isolatorAC route; cable if agreed ↓
  4. 04 / MAIN BOARDPV MCB + RCCBInside a suitable board or a separate enclosure.
Optional shared work. Sunollo can handle it all.

PREPARE THE ROUTES / BEFORE FINISHES

Optional work
with your contractor.

Agree only the tasks you want your contractor to handle.

01 / DC

Roof → inverter.

Empty conduit or casing for Sunollo’s DC cables.
02 / AC

AC isolator → main board.

AC isolator beside the inverter

Main distribution board

AC ISOLATORAC CABLEBOARD · PV MCB + RCCB
AC cable from the isolator to the board. Fit the PV MCB and RCCB inside, or in a separate enclosure if needed.
OPTIONAL CONTRACTOR PROVISIONREADY FOR SUNOLLO
01 / DC

Roof → inverter.

Provide roof and inverter openings linked by empty conduit or casing.

Allow 2-inch conduit diameter or casing width, with a draw wire and accessible ends. Sunollo installs the DC cables.

02 / AC

AC isolator → main board.

Provide a separate cable route from the AC isolator beside the inverter to the main board.

Your contractor may supply and pull the AC cables to the approved schedule. Otherwise, leave the route empty with a draw wire for Sunollo.

03 / POWER

AC isolator + board protection.

Fit the approved AC isolator beside the inverter, and the PV breaker and RCCB at the board.

Use the approved models and ratings. The assigned Licensed Electrical Worker (LEW) coordinates connection and testing.

Allow 2 inches (about 50 mm) for planning. Sunollo confirms the final internal size, casing depth, bends and number of routes. Keep DC and AC separate.

Before work: routes and cable sizes

Routes: Sunollo confirms the inverter position, openings, final conduit or casing size, and pulling points before work. Casing width alone does not confirm capacity.

Empty routes: Provide a draw wire, usable bends, accessible ends, supports and the required weather sealing and fire stopping.

Cables: Sunollo installs the DC cables. Agree who installs the AC cables. Connections and tests follow the approved electrical plan.

AC sizing: Use 63 A, 100 A or 200 A protection only where specified. Sunollo and the assigned LEW confirm cable sizes for the load, route and installation conditions—not from the home’s main breaker alone. Cable-sizing reference ↗

INVERTER LOCATION

Choose the inverter location.

Sunollo checks the wall, clearances, ventilation, weather exposure and service access before confirming the position.

Candidate inverter locations on an indicative ground-floor plan Choose A for a sheltered car-porch wall, B for an accessible external side wall, or C for a suitable service area. These are positions to assess with Sunollo, not approved locations for a particular home. A-02 / EQUIPMENT LOCATION STUDYINDICATIVE GROUND FLOOR LIVING / DININGSERVICECAR PORCHSIDE ACCESS A B C CANDIDATE POSITIONS ONLY · NO DIMENSIONS OR CONSTRUCTION ROUTES ARE IMPLIED
Possible locations. Sunollo must confirm yours.

Sheltered car porch.

Use a suitable wall, clear of doors, gates and vehicles. Leave room for servicing and cable routes.

INVERTER FAMILY

Allow room for the inverter and servicing. Reserve battery space if needed.

SigenStor EC energy controller without a battery

Confirm cable routes and connections before walls or ceilings close.

OPTIONAL ELECTRICAL HANDOFF

AC isolator, MCB and RCCB.

Examples—not an order list. Sunollo and the assigned LEW confirm the models, poles, amp ratings, cables and protection. 30 mA is leakage sensitivity, not the current rating.

WHERE DO THE MCB & RCCB GO?

Inside the board,
or beside it.

Allow space for the PV MCB, RCCB, cables and connections.

Confirm the electrical plan before buying devices or changing the board. Earthing and any extra protection follow that plan.

Full front view of a main distribution board, with rows of protective devices and circuit labels
Check board space before work.
Access scaffold beside a Singapore landed home, providing a working platform near the roof edge
Share access and removal dates.

OPTIONAL SHARED ACCESS

Use existing scaffolding,
if suitable.

Share the scaffold’s available dates if you want us to use it. Otherwise, Sunollo can arrange safe access.

We check suitability and agree provider approval, access and responsibilities before use.

Share the dates

IF YOU WOULD LIKE US TO COORDINATE

Send your drawings
and key dates.

For coordination, send the items below to Sunollo. If we’re handling the full installation, we’ll survey and plan it with you.

THE SHARED PLAN

Agree the tasks
and dates.

  1. Confirm roof fixings and the electrical plan.
  2. Set dates for early mounts, if needed.
  3. Agree who prepares routes and cables.
  4. Install, test and complete approvals.

Optional checklist for shared work.

Enlarged installation detail

© Sunollo