For Business · Rooftop solar
Rooftop solar for a factory or commercial building
KTronics designs, installs and commissions rooftop solar on factories, warehouses, offices and other commercial buildings in Sri Lanka, with our own engineers covering the Colombo, Gampaha and Kalutara districts and island-wide work beyond them. A new commercial system connects under the Net Plus scheme, so we prepare the capacity clearance and take the plant through the utility's inspection to the export meter; after handover it is watched on our own monitoring platform, under a ten-year warranty on every device we supply.
A three-phase site, sized from the connection and the roof
Most factories and commercial buildings are supplied in three phases, and the system is designed for that supply: three-phase inverters, with protection and metering on the three-phase side. A factory's demand falls mostly in daylight hours, when the array is producing, so the connection and the protection are designed with generation and load on the same board.
Under the Net Plus scheme everything the system generates is sold to the utility and your own use is billed separately, so the system is no longer matched to your consumption. Three things set the size: the unshaded roof, the capacity of your electricity connection, and the budget. The utility approves a system only up to the contract demand of the supply, and for a business we also size from the load profile and the maximum demand.
What the Net Plus scheme means for a business
The Ministry of Energy's directive of 11 September 2026 made Net Plus the only scheme for new rooftop solar agreements and closed Net Metering and Net Accounting to new applicants. Agreements already signed, and grid clearances granted on or before that date, keep their existing terms until they expire.
Under Net Plus the solar system has its own export meter. Every unit it generates is sold to the utility at a feed-in rate set by the Public Utilities Commission, and the electricity you use is billed separately at the normal tariff — the two are not netted against each other. The feed-in rate depends on the size of the system, in bands that change at 10 kW, 40 kW and 250 kW, and smaller systems are paid more per unit. The Commission revises the schedule, so the rates are not printed here: ask us which band your system falls in and what it pays today. New agreements run for up to twelve years, and the system needs a smart meter the utility can read remotely.
From the clearance request to commissioning
The order is set by the utility, and it is the same whether the premises are billed by Electricity Distribution Lanka — the former CEB distribution areas — or by LECO. How long the utility's part takes depends mostly on its area office and on whether the local transformer has capacity to spare, so we do not promise a date that is not ours to keep.
- Survey. An engineer visits the site and looks at the roof, the distribution board and the electricity bill. The quotation that follows is itemised — panels, inverter, surge protectors, changeover switch, enclosures and the metres of cable — so the figure can be checked line by line.
- Capacity clearance. We prepare and submit the online request against the electricity account the system will connect to: in the EDLCare portal at edlcare.edl.lk for a CEB-area supply, or in LECO's Solar PV Capacity Clearance System at solar.leco.lk for a LECO supply. It needs a recent electricity bill and identification for the account holder: for a person, a photograph of both sides of the national identity card; for an account in a company's name, we confirm with you at the survey which documents the utility asks for.
- The utility checks the premises, and whether the connection and the local transformer can take the capacity, and issues the clearance.
- Installation, to the itemised list in the agreement: mounting, panels, inverters, protection, cabling and the connection at the board.
- The utility's engineer inspects the system and witnesses the tests.
- The agreement is signed in the account holder's name, the export meter is fitted — and only then may the system run in parallel with the grid.
After handover: monitored, and under a ten-year warranty
Customer systems are collected automatically from the manufacturers' clouds on a four-hourly cycle. When a plant stops producing against its own baseline, or an inverter reports a fault, an alarm is raised and an email goes out. Every Sunday you receive what the system produced that week, that month and that year. Monitoring is tuned to catch a system that has stopped or thrown a fault; a system quietly producing less than it should is found at the annual inspection or by reading the weekly report, not by an alarm the same day.
Ten years on every device we supply, and that is our own undertaking rather than a manufacturer's term passed on: where a maker's warranty is shorter than ten years, the remainder is ours to honour. Under the maintenance agreement we respond to a reported hardware breakdown within six hours, an authorised person attends site within three working days of the report, and where the failed part is one we stock we aim to resolve within five working days. Where it is not, the timeline is the manufacturer's, and the agreement says so.
Equipment chosen for the site
Equipment is chosen for the site, not for a distributorship. Installations use inverters from Solis, Deye, Solax, GoodWe, Growatt, SMA and Must; panels from Jinko, JA Solar and Longi; and protection from Phoenix Contact, zBeny, Schneider and Chint. Our quotations refuse cheap surge protection, because fitting it voids the inverter warranty that we are the ones who have to honour.
What we need from you
- A recent electricity bill for the connection the system will use
- Identification for the account holder, for the capacity clearance request: both sides of the national identity card for a person, or the documents the utility asks for when the account is in a company's name
- Access to the roof and the main distribution board for the survey
- The account holder to sign the agreement in their own name
Based in Kelaniya, with our own engineers covering the whole Western Province — the Colombo, Gampaha and Kalutara districts. Beyond it we work island-wide, with projects delivered as far as the Galle and Kandy districts.
Site assessment
Request a site assessment for your building
Tell us the building, the district and roughly what the site uses, and an engineer will come back with what rooftop solar would involve — no obligation.