Industrial solar for mills, factories and plants

An industrial solar decision in Pakistan is not really a decision about solar. It is a decision about your daytime load, your tariff slab and your procurement — and those three things, not the brand of panel, decide whether the plant pays back in eight months or in three years.

I design, procure and commission industrial systems from around 100 kW to multi-megawatt. I take no margin on equipment, you receive every original supplier invoice, and my fee is 4% of total project cost invoiced once the system is installed, tested and generating. If it never runs, I am not paid.

Sizing is set by your load curve, not your roof

The single most expensive mistake in industrial solar right now is sizing from roof area. It was defensible under net metering, when an exported unit offset an imported one at close to parity. Since February 2026 it is not: export and import are priced separately and exported units are bought back at roughly a third of the old rate.

So the capacity that covers your own daytime consumption and the capacity beyond it are two different investments with two different payback periods. The first is excellent. The second is roughly three times slower. Any quotation that arrives at a kilowatt figure without having read your bills is quoting the second as though it were the first.

Which industrial loads suit solar best

The plants where the numbers are strongest are the ones whose demand curve already matches the generation curve, so very little is exported and the buyback rate barely touches them.

• Flour and rice mills — grinding runs through the working day, and the load is steady rather than spiky.
• Cold storage and ice plants — compressor duty rises with ambient temperature, so demand peaks on exactly the hot, bright afternoons when the array produces most. This is the closest thing to a perfect match in Pakistani industry.
• Food processing on a continuous day process — Simta Foods is this case, and it is why their economics work.
• Textile and light manufacturing on a single day shift — the plant and the array keep the same hours.
• Any site currently running diesel through the day. The unit you displace is priced against diesel, not against grid tariff, which changes the arithmetic entirely.

Redundancy: why I split inverters at scale

On the 1 MW plant at Simta Foods I specified two SOLIS 125 kW units per block rather than fewer larger inverters. It costs slightly more. It means a single inverter fault takes out part of your generation rather than all of it.

At 143 kW — the Ice Cold Storage plant in DG Khan — a single unit is the better trade, because the consequence of a fault is proportionally smaller and the second unit would not earn its cost. Neither choice is universally right. Not having a reason for the choice is what is wrong, and it is worth asking whoever quotes you which of the two they did and why.

Procurement is where industrial projects are won and lost

On a megawatt-scale project the difference between wholesale procurement and procurement through a margin is a large fraction of a year of payback. It is a bigger lever than almost any equipment decision, and it is invisible in a quotation that gives you one consolidated number.

This is the whole reason the fee model is what it is. I have no commercial interest in which panel you buy or what it costs, so I can tell you when the cheaper module is the right answer — and when it is not. Ask any other quotation the same question: what is your margin on this equipment, and will you show me the supplier invoices?

What the timeline actually looks like

Six to twelve weeks from order to commissioning is realistic for a project in the hundreds of kilowatts. Procurement lead time on inverters is normally the constraint rather than installation. The net metering or net billing application with your distribution company runs alongside and can add several weeks on its own — which is why it starts on day one rather than after the array is up.