Rooftop solar for factories and buildings.

EPC by our own engineering team, designed around your daytime load, for sites across Indonesia.

Installed capacity: 28.5 MWp
Projects installed: 187
Provinces served: 16

LEIN project SUN Energy · Automotive & components · Banten · 1,350.80 kWp

How solar works for business.

Two simulations: a factory with on-grid rooftop solar and an island resort with an off-grid hybrid system.

Illustration: a factory in an industrial estate with solar panels on its metal roof, six inverters under a canopy on the side wall, an electrical room, and a fenced transformer and diesel genset — The morning shift takes over from the night shift and the machines keep running. The panels are only just starting to produce, so PLN still supplies most of the load. At 07:00: Solar 0.4 MW, Inverter supplying 0.4 MW, PLN 4.4 MW, Building 4.8 MW, Diesel genset standby.

MW figures are a simulation: a 24-hour factory on three shifts with a working-day load of about 5 MW and 2.8 MWp of on-grid rooftop solar with zero export. Solar output is scaled from LEIN system data for a clear day. In the simulation, the diesel genset is sized at about 130% of the PLN connection and can run for up to about 6 hours, so the whole load keeps running during an outage. Image: illustration, not a LEIN project.

Figures are a LEIN simulation of an island resort in eastern Indonesia without PLN, using about 40 kW day and night, with 220 kWp of solar, a 720 kWh battery (BESS), a 100 kVA diesel genset and an energy management system (EMS). Solar output follows LEIN’s energy model for a clear day; a cloudy day gives 30% of that and a rainy day 10%. Over a simulated year, the genset alone would use about 119,000 litres of diesel; with solar and the BESS, about 10,000 to 29,000 litres, depending on solar output, BESS cooling and BESS ageing. Image: illustration, not a LEIN project.

Sized to your daytime load
On a working day the panels produce less than the factory uses, so every kilowatt-hour is used on site.
Zero export
On holidays, the inverters limit output to what the building uses. Since Minister of Energy and Mineral Resources Regulation No. 2 of 2024, power exported to PLN no longer reduces the bill.
When PLN goes down
An interlock contactor disconnects the inverters, and the building’s diesel genset, if it has one, takes over the load.

For factories and commercial buildings, we design the system around your daytime use and your PLN bills.

Get A Quote

75–90% less diesel

LEIN simulation for an island resort in eastern Indonesia, compared with running the genset alone: fewer fuel deliveries by boat and quieter nights.

For resorts and sites without PLN, we design off-grid hybrid systems around your daily load profile and your genset.

See off-grid hybrid design

What we do.

From your first PLN bills to a running, monitored system.

On-grid rooftop solar
For factories, warehouses, offices, malls, apartments, hospitals and campuses. Sized to your daytime load, with zero export to PLN.
How a project runs
EPC for solar developers
Design, procurement, installation and commissioning of rooftop systems for solar developers, plus the surveys and studies behind their tenders.
Engineering services
Off-grid hybrid design
For resorts and sites without PLN: solar panels, a battery energy storage system (BESS), your diesel genset and an energy management system (EMS).
Off-grid hybrid
Operation & maintenance
Preventive and corrective maintenance, including panel cleaning, with monitoring registered in your company’s name.
Maintenance

Sectors we have built for

Textiles & garments6.2 MWp6 projects
Rubber & plastics5.5 MWp6 projects
Food, beverages & agribusiness5.2 MWp26 projects
Materials & building products3.6 MWp4 projects
Retail, offices & hospitality2.1 MWp11 projects
Automotive & components1.8 MWp10 projects
Mining, oil & gas, energy1.4 MWp16 projects
Logistics & warehousing0.8 MWp1 project
Wood & furniture0.6 MWp3 projects
Institutions, education & public sector0.4 MWp12 projects

LEIN portfolio data as of 28 October 2026. The ring around each icon shows the sector’s share of total installed capacity. Capacity rounded to 0.1 MWp.

Benefits beyond profit.

Why solar power for your business? Lower costs come first, but they are not the only return.

Illustration: five factory workers in uniforms and hard hats, seen from behind, looking at a factory roof covered with solar panels on a clear morning — Illustration AI-generated. Not a LEIN project.

For your RE100 and ESG targets

Some of the factories we build for install solar because their principals or overseas buyers ask them to. Here is what a rooftop system gives your sustainability team.

Counts towards RE100
Under the RE100 technical criteria, a rooftop system your company owns counts as self-generation, and one a third party owns on your site counts as an on-site power purchase agreement (PPA). Neither needs energy attribute certificates (EACs) to be cancelled, as long as no certificates from the system are sold to anyone else. Local regulations still apply.
Data for your ESG reports
Download your monthly production from the monitoring app whenever you need it, ready for your ESG reports and your buyers’ sustainability questionnaires.
See the monitoring app

Supports SDG 7 and SDG 13

Sustainable Development Goal 7: Affordable and Clean Energy

Sustainable Development Goal 13: Climate Action

Clean power from your own roof contributes to Sustainable Development Goal 7, Affordable and Clean Energy, and Goal 13, Climate Action.

Source: RE100 technical criteria (March 2025), sections 4 and 5 (opens another website)UN guidelines for the use of the SDG logo and icons (PDF) (opens another website)

Less diesel. More sun.

Resorts, islands and remote sites often run on diesel gensets day and night. We design off-grid hybrid systems that let the sun carry most of the load: solar panels, a battery energy storage system (BESS), your diesel genset and an energy management system (EMS) that runs them together.

75–90% less diesel

LEIN simulation for an island resort in eastern Indonesia, compared with running the genset alone: fewer fuel deliveries by boat and quieter nights.

In the same simulation, the genset alone would use about 119,000 litres of diesel a year; with solar and the BESS, about 10,000 to 29,000 litres.

What we design

Load profile: Day and night use, from your genset logs or a load measurement.
Solar and BESS sizing: Enough for the nights and for cloudy days, with the genset as backup.
EMS settings: When the genset starts and stops, and the BESS reserve it protects.
Genset integration: Your existing genset stays in the system as the backup and runs far less.

To size a system, send us

Monthly diesel use, in litres
Genset size (kVA) and running hours
Day and night load, or genset log sheets
Land or roof area available for panels

Get A Quote

Engineering & feasibility studies.

Solar developers, consultants and building owners also hire our engineering team for the work before a project: paid site surveys, detailed engineering design (DED) for tenders, and feasibility studies.

250+ MWpof feasibility studies across almost every region of Indonesia, including remote areas

Illustration: two engineers in hard hats at an open switchboard, one clamping a power quality analyser onto the cables and one checking temperatures with a thermal gun; a third writing the survey report on a laptop showing a 3D roof model; a fourth flying a survey drone over the factory roof, where two colleagues in safety harnesses measure the roof — Illustration AI-generated illustration of the engineering work we do: a load measurement with a power quality analyser, a thermal check of the switchboard, a drone survey and roof measurements, and the survey report with a 3D roof model.

Paid site survey
Roof, electrical rooms and connection point, documented on site with photos and measurements.
Survey report
Findings, photos, constraints and recommendations, ready for your design or tender.
Load measurement with a PQA
A power quality analyser logs the actual load profile, so the system is sized to measured data.
DED, PVsyst and SketchUp
Detailed engineering design, energy yield simulation in PVsyst and 3D layouts in SketchUp.
Harmonic and power factor analysis
Studies of harmonics and power factor, with ETAP modelling of the electrical system.
Bill of materials
A complete BoM for procurement or tenders, from modules and inverters to cables and protection.

Discuss An Engineering Study

How a project runs.

Seven stages from first data to a running system, with one LEIN team from start to finish.

Introduction
We ask for initial data (PLN bills and roof details), introduce LEIN and give a first estimate of your savings.
Feasibility study
A free online survey with simulation software, then a site visit arranged with you. We analyse the load profile and prepare a preliminary design.
Proposal
A proposal with the savings calculation, product options and a price quotation.
Detailed engineering
The final design and specifications the contract is based on.
Contract
The EPC contract is signed and material procurement begins.
Project execution
Kick-off meeting, scheduling, installation, testing and commissioning.
about 20 weeks from contractSee the typical timeline
Operation & maintenance
The system runs and is monitored in your name; we provide preventive and corrective maintenance, including panel cleaning.

Typical project timeline

For commercial and industrial rooftop solar, a project takes about 20 weeks from contract to testing and commissioning. Procurement starts in week 2 while design is still under way, and the mounting structure goes up as soon as its materials arrive. PLN approval follows the rooftop solar quota for your area and PLN’s application periods, so it can take longer when the quota is full.

20 weeks from contract to testing and commissioning

EPC contract, start of week 1
Survey & design2 weeksweeks 1–2
Procurementweeks 2–9
1. Balance of system (BoS)4 weeksweeks 2–5
2. Solar panels8 weeksweeks 2–9
3. Inverters8 weeksweeks 2–9
Material deliveryweeks 8–11
1. Balance of system (BoS)1 weekweek 8
2. Solar panels2 weeksweeks 10–11
3. Inverters2 weeksweeks 10–11
Installationweeks 9–19
1. Mounting structure8 weeksweeks 9–16
2. Solar panels8 weeksweeks 12–19
3. Cabling4 weeksweeks 16–19
4. LV and distribution boards2 weeksweeks 18–19
5. Inverters2 weeksweeks 18–19
6. Earthing2 weeksweeks 18–19
Testing & commissioning1 weekweek 20

Procurement and delivery times depend on material availability and customs clearance.

Installation time depends on the weather. Connection to the building’s main distribution board follows the building’s schedule (about 1 day).

Typical schedule; every project’s timeline may differ.

The LEIN team at a factory site: crew in navy coveralls with reflective stripes, hard hats, gloves and fall-protection harnesses, with colleagues in white shirts — LEIN team On site at a factory project, in full PPE with fall-protection harnesses for roof work.

Four LEIN technicians in yellow hard hats, hi-vis vests and safety harnesses installing panels on a factory’s metal roof, with a colleague on the roof behind them — LEIN team Panel installation on a factory roof, with hard hats, hi-vis vests and safety harnesses.

Built for your roof.

Each roof type has its own mounting method, the same one we specify in our proposals. On metal and tile roofs either the roof is not drilled at all or every fixing point is sealed; on concrete decks the method follows the wind load and the deck’s capacity. Without a suitable roof, a solar carport puts the panels over the car park.

Klip-Lok clamp
Klip-Lok / standing-seam metal roof
Aluminium clamps grip the roof seam; an L-foot is bolted on each clamp and the rail is bolted to its side — no holes in the roof sheet.
- Non-penetrating: the roof stays watertight as built
- Clamps torqued to specification; wind-load rated
- Anodised aluminium rails, stainless-steel mid/end clamps
L-feet
Metal deck (spandek) / uPVC sheet
Aluminium L-feet sit on the rib crests, each fixed to the purlin with one self-drilling screw + EPDM washer; rails sit on the L-feet.
- One screw per L-foot on the rib crest, with EPDM washer + sealant at every point
- L-feet spacing per wind-load and purlin-span calculation
- Anodised aluminium rails, stainless-steel fasteners
Hanger bolt
Corrugated zinc / uPVC sheet (timber purlins)
Stainless hanger bolts are screwed through the corrugation crest into the timber purlin; an EPDM washer and nut seal the penetration, and an aluminium L adapter on the bolt’s upper thread carries the rail.
- Bolts on the crest with EPDM washer + sealant at every point
- Adapter height adjusts on the thread to level the rails
- Anodised aluminium rails, stainless-steel bolts and nuts
Tile roof hook
Clay / concrete tiles
Aluminium hooks are screwed to the rafters or trusses (timber or light steel) — never to the battens — with stainless-steel screws and bolts; tiles are refitted over the hooks and the rail is bolted to the side of each hook’s upright.
- No holes in the tiles: water keeps running over the tiles
- Silicone sealant at every point where a hook comes out over the tiles
- Tiles cracked during the works are replaced by LEIN
Ballast (concrete blocks)
Concrete flat roof
A triangular 10–15° aluminium frame rests on the deck and is held down by concrete ballast blocks on both sides of the base rail — the deck is not drilled.
- Ballast weight calculated against site wind load and deck load capacity
- Blocks sit on aluminium trays fixed to the frame, on both sides of the base rail
- Maintenance walkways between module rows
Ground-mounted (concrete pedestals, no drilling)
Concrete flat roof
Concrete pedestals are cast directly on the deck without drilling; the 10–15° aluminium frame is bolted to the pedestals, whose weight holds it against the wind.
- Pedestal size and weight calculated against site wind load and deck load capacity
- Deck not drilled: the waterproofing under the pedestals stays intact
- Modules sit higher above the deck, leaving more room for cleaning and drainage underneath
Ground-mounted (concrete pedestals + chemical anchors)
Concrete flat roof
Concrete pedestals are tied to the deck slab with chemical anchors — rods in drilled holes filled with epoxy; the 10–15° aluminium frame is bolted to the pedestals and the waterproofing is recoated around them.
- Strongest hold in high winds — suited to tall or exposed decks
- Drilling depth and number of anchors follow the slab thickness and wind load
- Drilled holes are filled with epoxy and covered by the new waterproofing coat
Solar carport
Open car park
Steel columns on concrete foundations carry the beams and purlins; the panels sit on top and form the carport roof, shading the cars below.
- Structure and foundations designed for the site’s wind load and soil conditions
- No building roof needed: for sites whose roofs are full, too weak or shaded
- Column positions and clearance follow the parking layout

Licences and certifications

For procurement teams: our licences and certificates, linked to their official sources where they are published online.

Warranty.

Manufacturer warranties on the equipment, a 1-year LEIN workmanship warranty, 10 years on the mounting structure, and free support with warranty claims.

Manufacturer warranties

Brands depend on availability, with brands from our Tier 1 list as the first choice; the exact brand, model and warranty terms are in your proposal.

Equipment	Warranty
Solar panels
Tier 1 n-type panels (e.g. JA Solar, Trina Solar)	Product warranty of at least 12 years and a 30-year performance warrantyOutput drops by at most 1% in the first year, then by 0.4% a year, so at least 87.4% remains in year 30. The terms for each model are in the comparison below.
Inverters
Huawei SUN2000 for commercial and industrial systems	5 years
Other components
Huawei SmartLogger and Smart Power Meter	2 years
Aluminium and stainless steel mounting structure	10 yearsAgainst material defects.
Cables, distribution boards, protection devices and accessories	1 yearAgainst material defects.

LEIN workmanship warranty

1 year from handover

It covers the quality of our work, not materials:

Mounting structure and panel installation
DC and AC cabling
Distribution panel assembly
Watertightness of the roof penetrations we make

Terms

Support with manufacturer claims is free. Costs the manufacturer does not cover (removal and reinstallation, transport and shipping of the unit, and import duties and taxes on the replacement unit) are paid by you, unless the damage comes from our installation within the workmanship warranty period.
The workmanship warranty ends if the system is modified, moved or repaired without LEIN’s written approval.
Not covered: natural disasters, direct lightning strikes and fire; PLN voltage surges, pests and negligent operation; the existing electrical installation, normal wear and discolouration; and building changes needed for the installation.
Keep the system online, and tell us when you change your router or Wi-Fi. Monitoring, firmware updates and the manufacturers’ extended warranties depend on this connection.
Damage that appears or grows because the system stayed offline for a long time without monitoring is not covered by the workmanship warranty, and the manufacturer may reject the claim.
The manufacturers’ terms apply. The exact models and terms are in your proposal.

How manufacturer warranties compare

From each manufacturer’s own warranty documents and datasheets, checked between 30 October 2026 and 2 November 2026. What applies to your system is the warranty for the exact model and document version in your proposal.

Solar panels · Inverters · Monitoring, metering and backup components

Compare Manufacturer WarrantiesHide The Comparison

Solar panels

Product warranty

Covers defects in the panel itself: materials, workmanship and manufacturing. If a panel fails from a defect, the manufacturer repairs or replaces it, or refunds its remaining value.

Performance warranty

Guarantees a minimum power for every year of the warranty, measured under standard test conditions. If a panel falls below it, the manufacturer replaces it, adds panels to make up the difference, or refunds the shortfall.

Guaranteed minimum power by year

Brand and model	Product warranty	Performance warranty	Loss in year 1	Annual loss after year 1	Minimum at the end
JA Solar DeepBlue 4.0 Pro (JAM54D40)	15 years	30 years	1%	0.4%	87.4%
Trina Solar Vertex S+ (TSM-NEG9R.28)	15 years	30 years	1%	0.4%	87.4%
Jinko Solar Tiger Neo (JKM-N-54HL4R)	15 years	30 years	1%	0.4%	87.4%
LONGi Hi-MO X10 (LR7-54HVH)	15 years	30 years	1%	0.35%	88.85%

Inverters

Brand and models	Homes	Commercial & industrial	Warranty start and conditions	Extended warranty
Huawei SUN2000	10 years	5 years	From installation and commissioning.	Paid Extended warranty service under a new contract, bought before the standard warranty ends; its term and cost depend on storage and operating conditions.
SMA Sunny Boy, Sunny Tripower	5 years	5 years	From commissioning when registered within 12 months. Units bought under SMA’s earlier terms are covered in Indonesia; version 88, for purchases from 20 May 2026, covers Asia-Pacific only in Australia and New Zealand.	Free Sunny Boy and Sunny Tripower 3AV-40: 10 years in total when registered within 12 months of commissioning (SMA’s earlier terms). Paid Extensions of up to 20 years in total are sold under each country’s terms; we found no published terms for Indonesia.
Sungrow SH and SG series	5 years	5 years	Asia-Pacific terms: from installation for units bought through Sungrow’s authorised distributors, at most 6 years after production.	Paid Up to 25 years in total for selected models, covering every inverter in the system; bought with the inverters or within 1 year of installation, or later while the warranty runs at a different cost.
Solis S5 and S6 series	5 years	5 years	For units made from 1 July 2025: from the sale date for individual buyers, otherwise from commissioning or 6 months after leaving the factory, whichever is earlier.	Paid To 6–10 years in total, applied for once within 12 months of the warranty start and paid by card in the SolisCloud app; covers hardware repair or replacement only.
Deye SUN-SG hybrid, SUN-G	5 years	5 years	From the installation date.	Option 10 years in total when written on the sales order; Deye does not state the cost.
GoodWe ET, EH, ES, DNS, XS, SDT, SMT, HT	5 years	5 years	From installation, or 6 months after production, whichever is earlier.	Paid To 7 or 10 years in total with transport and on-site labour, or up to 25 years in total for hardware only, through authorised distributors; some options are not offered for hybrids. Bought within 12 months of production for hybrids and on-grid units from 25 kW, 30 months for smaller on-grid units, or within 6 months of installation.

Most paid extensions must be bought early, often within the first year after purchase or installation. We can arrange one with your order; its term and cost are in your proposal.

Monitoring, metering and backup components

Brand	Component	Warranty
Huawei	Optimisers for commercial and industrial systems	5 years
Huawei	Smart Dongle, SmartLogger, smart meter and Smart Power Sensor	2 years
GoodWe	Smart meters, Wi-Fi, LAN and 4G modules, EzLogger, SEC	2 years
Solis	External meters, data logging sticks, export power managers	2 years
SMA	Energy Meter, Sunny Home Manager, Data Manager M	2 yearsUnder SMA’s earlier terms; version 88, for purchases from 20 May 2026, does not cover Indonesia.
Sungrow	Smart meter and WiNet-S dongle	2 yearsAsia-Pacific terms, at most 3 years after production.

Sources

Monitoring and maintenance.

After handover, you see how the system performs, and we keep it performing.

Illustration: a laptop showing the Sunny Portal dashboard of a 97.6 kWp warehouse system, with live energy flow, inverter status and yearly yield, and a phone on a stand showing the same system, on an office desk with a hard hat, in front of a factory roof with solar panels — Illustration Real Sunny Portal screens from a LEIN warehouse system (97.6 kWp, on-grid since 2020). The system name and serial numbers are changed, and the room is AI-generated.

Two LEIN technicians in hard hats and safety harnesses cleaning rows of panels on a factory’s metal roof with a hose and a long mop — LEIN team Panel cleaning on factory roofs, with hard hats and safety harnesses.

Three LEIN technicians in hard hats and safety harnesses on a factory roof: one sprays water while two scrub the panels with long-handled mops — LEIN team Panel cleaning on factory roofs, with hard hats and safety harnesses.

Monitoring in your company’s name
Systems are registered in your name on the manufacturer’s monitoring app, with LEIN as the installer, so the data and the warranty stay in your name. You can see data for each inverter, as well as production reports.
Preventive maintenance
Scheduled visits with panel cleaning, visual and electrical checks and inverter maintenance, and a report after each visit.
Corrective maintenance
We monitor at string level in the manufacturer’s monitoring app and respond within 24 hours on working days: fault finding and repair, with warranty claims handled with the manufacturers.

Book a one-off visit or an annual maintenance package; performance guarantees can be arranged in an O&M contract. The price depends on the size of your system.

Ask About Maintenance

Our commercial & industrial projects.

Browse the rooftop solar systems LEIN Power has designed and built for commercial buildings and industry. Projects built for solar developers are listed by developer and the end customer’s sector.

Commercial 17 featured projects

Xurya · Retail & shopping centres · West Sumatra753.9 kWp
United Tractors Head Office · Cakung · Jakarta50.8 kWp
Toyota Astra Motor SPLD · Cibitung · Bekasi61.56 kWp
GSK | Haleon · Jakarta22.5 kWpMint outline: LEIN’s four arrays (2019). The other panels on this roof are by other installers.
Astra Biz Center · BSD · South Tangerang32.4 kWp
Prasetiya Mulya · BSD · South Tangerang49.5 kWp
RSCM Building A · Jakarta49.5 kWp
Xurya · Hospitality & leisure · Bali177.48 kWp
Wisma BCA · BSD · South Tangerang98.94 kWp
Xurya · Hospitality & leisure · Jakarta15.4 kWp
Astra Motor HSO Dewi Sartika · Jakarta62.4 kWp
SMPN 3 · Malang19.6 kWp
PAMA 2 Head Office · Jakarta130.2 kWp
Pertamina Apartment RU IV · Cilacap189 kWp
Pertamina Apartment RU V · Balikpapan94.5 kWp
FIF Astra · Pamulang · South Tangerang10.5 kWp
GS Battery · Karawang50.2 kWp

Industrial 17 featured projects

Xurya · Tyres & rubber · Banten2,747.80 kWp
Greenroof · Agribusiness & animal feed · Banten899.84 kWp
Greenroof · Plastics & packaging · Central Java1,821.48 kWp
SUN Energy · Automotive & components · Banten1,350.80 kWp
Xurya · Logistics & warehousing · West Java751.84 kWp
Suryanesia · Food & beverages · East Java503.13 kWp
Xurya · Textiles & garments · Central Java2,717.88 kWp
Xurya · Food & beverages · West Java308 kWp
Xurya · Food & beverages · East Java783.20 kWp
Xurya · Textiles & garments · West Java583.2 kWp
Suryanesia · Furniture & processed wood · Jakarta431.46 kWp
Xurya · Ceramics & building materials · East Java1,881 kWp
Medco Ratch Power Riau · Pelalawan47.52 kWp
Xurya · Textiles & garments · Central Java1,727.5 kWp
Poultry Farm · Deli Serdang15 kWp
BIB Angsana Phases I and II · Tanah Bumbu164.22 kWp
PAMA · Cileungsi · Bogor400 kWp

Trusted by leading companies

See all projects

Questions businesses ask.

Can we sell excess power to PLN?

No. Since Minister of Energy and Mineral Resources Regulation No. 2 of 2024, power exported to PLN no longer reduces the bill. That is why we size the system to your daytime load and set the inverters to zero export.

Is there an option with no upfront investment?

Yes. Besides buying the system, your company can go solar with no upfront investment through a lease or a power purchase agreement (PPA) with a solar developer. We build rooftop systems for solar developers and can introduce you. The contract term and the price of the power then follow the developer’s offer.

What happens on holidays or during a PLN outage?

On holidays, the inverters limit output to what the building uses and keep a small draw from PLN as a safety margin. During an outage, an interlock contactor disconnects the inverters so solar power cannot flow back into the genset, and the building’s diesel genset, if it has one, takes over the load. The solar power system reconnects once PLN is back.

Will installation disrupt production?

Most of the work happens on the roof while the building runs as usual. Connecting to the building’s main distribution board follows your schedule and takes about 1 day.

Is our roof strong enough?

We look at the roof type, its condition and the structure during the site visit, and design the mounting for it. If the roof needs attention first, we discuss it with you before the contract.

How long does a project take?

Typically about 20 weeks from contract to testing and commissioning. Procurement depends on material availability and customs clearance, and installation on the weather. PLN approval follows the rooftop solar quota for your area and PLN’s application periods, so it can take longer when the quota is full.

Which permits are needed?

The system needs PLN approval and an operating certificate (SLO). We prepare the technical documents and support you through both until the system is officially running. LEIN holds an IUJPTL business licence and an SBUJPTL certificate from the Ministry of Energy and Mineral Resources.

Is the survey free?

The online survey is free: we model your roof with simulation software. We then arrange a site visit with you. A full engineering site survey, with a written report, PQA load measurement and studies, is a separate paid service.

What warranty do we get?

Manufacturer warranties on the equipment, a 1-year LEIN workmanship warranty, 10 years on the mounting structure, and free support with warranty claims. The exact models and terms are in your proposal.

Who owns the monitoring data?

You do. Systems are registered in your name on the manufacturer’s monitoring app, with LEIN as the installer, so the data and the warranty stay in your name.

See what your roof can do.

Tell us about your building, and we will send a first design and savings estimate. The online survey is free: we model your roof with simulation software. We then arrange a site visit with you.

Get A Quote

What to prepare

PLN bills for the last 12 months
Connected capacity (kVA)
Roof photos or a roof plan
Operating hours and holidays

Rooftop solar for factories and buildings.

How solar works for business.

Sized to your daytime load

Zero export

When PLN goes down

What we do.

On-grid rooftop solar

EPC for solar developers

Off-grid hybrid design

Operation & maintenance

Sectors we have built for

Benefits beyond profit.

For your RE100 and ESG targets

Counts towards RE100

Data for your ESG reports

Supports SDG 7 and SDG 13

Less diesel. More sun.

What we design

To size a system, send us

Engineering & feasibility studies.

Paid site survey

Survey report

Load measurement with a PQA

DED, PVsyst and SketchUp

Harmonic and power factor analysis

Bill of materials

How a project runs.

Introduction

Feasibility study

Proposal

Detailed engineering

Contract

Project execution

Operation & maintenance

Typical project timeline

Built for your roof.

Klip-Lok clamp

L-feet

Hanger bolt

Tile roof hook

Ballast (concrete blocks)

Ground-mounted (concrete pedestals, no drilling)

Ground-mounted (concrete pedestals + chemical anchors)

Solar carport

Licences and certifications

Warranty.

Manufacturer warranties

LEIN workmanship warranty

Terms

How manufacturer warranties compare

Solar panels

Product warranty

Performance warranty

Inverters

Monitoring, metering and backup components

Monitoring and maintenance.

Monitoring in your company’s name

Preventive maintenance

Corrective maintenance

Our commercial & industrial projects.

Commercial 17 featured projects

Industrial 17 featured projects

Trusted by leading companies

Questions businesses ask.

See what your roof can do.

What to prepare