Solar for Cotton Ginning Factories

This guide explains where the power goes in a ginnery, how to size solar for a seasonal business, and what to keep in mind around lint and cotton stores.

Why ginning is different from other factories

Most factories in Punjab use power at a similar level through the year. A ginning factory does not. Cotton is picked and brought to the ginneries after the summer harvest, and arrivals are reported through the autumn and into winter. Industry reports show ginneries working from the start of the season through to around the turn of the year, with the number of factories operating changing from season to season.

That gives a ginnery three distinct load periods:

The number of active ginning factories also changes year to year with the crop. Reports for December 2025 counted fewer active units in Punjab than two years earlier. A solar plant lasts many crop years, so it should not depend on one good season.

Diagram

Cotton ginning: a seasonal load

Season

Gins and presses run hard by day

Off season

Solar serves offices and other loads

Where the power goes in a ginnery

The main electrical loads in a saw or roller ginning plant are motors:

• Gin stands. Saw gins or roller gins, each driven by a motor. In a large factory there may be many stands running together.
• Pre-cleaners and lint cleaners. Motors and fans that remove trash before and after ginning.
• Pneumatic conveying. Large fans and blowers that move seed cotton and lint through ducts. Often among the biggest loads.
• Bale press. A hydraulic press driven by a pump motor, with heavy peaks while pressing.
• Seed handling. Conveyors and screws that move cottonseed out of the plant.
• Lighting, offices and weighbridge. Small, but they run all year.

Some ginners also run a cottonseed oil expeller or other processing on the same connection. If you do, that load can be the most useful year-round base for solar. Our guide on solar for oil and ghee mills covers expellers in detail.

Sizing solar for a seasonal load

New solar connections now come under NEPRA's net billing rules, notified on 9 February 2026. Units you import are billed at your normal tariff, while units you export are credited at a much lower rate. Solar capacity also cannot exceed your sanctioned load. The full rules are in our net metering and net billing guide.

For a ginnery, this changes the sizing logic. A unit of solar used inside the factory is worth your full tariff. A unit exported in the off-season is worth much less. So:

1. Start with the year-round base. Measure what the site uses outside the season. A plant sized to that is used almost fully every month.
2. Add season capacity carefully. Extra panels for the season produce well in September and October but mostly export from spring to early summer. Check whether the season's savings justify them.
3. Look for off-season uses. An oil expeller, a cold store, a nearby house on the same connection or other business can soak up off-season output. Each is a design question for your own site.
4. Respect the sanctioned load. The plant cannot be larger than your sanctioned load, even if the season's demand is high.

Our guide to sizing under net billing explains the self-use-first method step by step.

How to estimate the benefit yourself

We do not publish savings figures, because every ginnery's season and tariff are different. The numbers below are round illustrative values only.

For example, if a ginnery uses about 3,000 units a day in season and about 300 units a day off-season, a plant sized to the off-season base is used almost entirely all year. A plant sized to cover a large share of the season load would also produce several times the off-season need for months, and most of that surplus would be exported at the lower rate. Multiply the units actually used on site by your full tariff, the exported units by the export rate, and compare. A good proposal shows this calculation month by month with your own bills.

Demand charges in the season

Industrial bills include a fixed charge based on maximum demand (MDI). In a ginnery, demand peaks when many gin stands, fans and the press run together. If the factory works through the night in the season, peaks may fall when solar produces nothing.

Practical steps before any battery is considered:

• Start large fans and gin stands in sequence rather than all at once.
• Check that the bale press and conveyors are not set to start together.
• Review capacitor banks, because motor-heavy plants often carry power factor correction that interacts with solar. See power factor and solar.

Our guide on MDI in your electricity bill explains how demand charges work and where solar does and does not help.

Lint, dust and fire risk

Lint and fine cotton dust are highly flammable, and ginneries handle large stores of seed cotton and bales. Fire safety shapes the whole design:

• Keep electrical equipment out of lint areas. Inverters, combiner boxes and AC distribution go in a separate, closed and ventilated room or enclosure, away from gin halls, lint rooms and bale yards.
• Enclosure rating. Choose enclosures and cable glands that keep dust out, and keep inverter cooling paths clear of lint build-up.
• DC isolation. Panels produce voltage whenever there is light. Clearly marked DC isolators let staff and firefighters isolate strings. Protection and earthing follow our earthing and surge protection guide.
• Where panels go. Avoid placing panels over stores of seed cotton or bales where a fault, a hot spot or firefighting access could be a problem. Office roofs, workshop sheds, parking areas and spare land are often better.
• Cleaning. Lint settles on panels in the season and cuts output. Plan safe roof access and a cleaning routine for those months.

Our fire safety guide for solar covers the general rules. Textile units face a similar lint problem; see solar for textile, dyeing and loom units for how we handle it over sheds.

Roofs, sheds and land

Ginneries usually have large open yards and some metal sheet sheds. Two options suit them:

• Sheet roofs. Panels can go on metal sheet roofs with the right clamps and a structural check. See solar on tin and metal sheet roofs.
• Ground-mounted arrays. Spare land away from the cotton yard can carry a ground-mounted plant, which is easier to clean and keeps panels clear of lint stores. See ground-mounted solar for factories.

Our in-house engineers design every structure, our own team fabricates and assembles it on site, and structures carry a 3-year Solar Works Pakistan structure warranty.

Outages, generators and batteries

Standard on-grid inverters switch off when the grid fails. Many ginneries already run a generator in the season.

• Generator integration. With a proper controller, solar can share the load with the generator while keeping the generator above its safe minimum load. See our solar and generator hybrid guide.
• Battery storage (BESS). A battery for a seasonal factory needs a clear job, because it will be underused for months. It rarely pays for a ginnery alone. Read Battery storage (BESS) for factories: when does it pay?

A sensible approach for many ginners is a phased one: build the year-round base first, run one season, then decide on more capacity with real data. See planning a phased solar rollout.

Solar plant price for a ginning factory

Ginnery plants are quoted per project after a site survey and design.

What to prepare before a site survey

Our guide to the energy audit before industrial solar explains what to measure. For a ginnery, bring:

• 12 months of electricity bills, covering a full season and off-season, including MDI.
• Number and type of gin stands, fans, cleaners and the press, with motor ratings.
• Typical season dates and shifts for your factory.
• Generator rating, fuel and season running hours.
• Any off-season load on the same connection.

How Solar Works Pakistan delivers factory projects

Solar Works Pakistan is a Faisalabad-headquartered solar EPC, engineering and trading company, founded in 2021, with a branch in Lahore. We have served 300+ customers, including 50+ industrial clients, and build projects from about 6 kW to megawatt scale. Load analysis, AutoCAD design and structural design are done in-house, and our own teams install, test and commission. Major equipment carries the manufacturer's warranty per product. After a complaint is registered, we target sending service personnel within 48 hours to begin diagnosis. See our industrial and commercial solar page.

Many ginneries are in south and central Punjab. We serve factories throughout Punjab, including around Multan, Bahawalpur and Rahim Yar Khan.

Get today's price or a free site survey

Send us a full year of bills and your machine list. Our engineers will tell you plainly how much solar your season and off-season can actually use.

• WhatsApp or call: 0336 666 4321
• Email: info@solarworks.pk
• Head office: Main Boulevard, Sargodha Rd, Block F FDA City, Faisalabad (Faisalabad page)
• Lahore branch: 2nd Floor, Jeff Heights, Gulberg, Lahore (Lahore page)
• Hours: 9:00 AM to 6:00 PM, daily

We serve all of Punjab, and site surveys are normally free. You can also contact us online.

Frequently asked questions

Is solar worth it for a cotton ginning factory?

It can be, if it is sized around what the factory uses through the whole year. A plant sized only for the peak season will export much of its output in the off-season at the lower net billing rate. A year-round base load, such as an oil expeller or offices, makes solar far more useful.

Can solar run gin stands and the bale press?

Yes, as part of a grid-connected or hybrid plant. Solar supplies the motors during the day while the grid or generator covers starting surges, cloudy periods and night shifts. Running a ginnery on solar alone is not practical.

What happens to solar output when the ginnery is closed?

Whatever the site does not use is exported to the grid and credited at the net billing export rate, or limited if export is not allowed. That is why off-season use matters so much when choosing the plant size.

Is lint a fire risk for solar equipment?

Lint and cotton dust are highly flammable, so inverters and electrical boxes must be kept in a separate, closed area away from gin halls and stores. Panels should avoid roofs over seed cotton or bales, and DC isolators must be clearly marked.

Should a ginnery add batteries with solar?

Usually not at first. A battery sits underused for months in a seasonal business. It can make sense where outages in the season are costly or where the battery has a year-round job.

Can solar work with my ginnery's generator?

Yes. With a generator controller, solar shares the load and keeps the generator above its minimum safe load. This can reduce generator running in daylight during the season.

Sources

1. Profit (Pakistan Today), "Sindh's cotton arrivals outpace Punjab, reaching 2.893 million bales" (13 January 2026), on season timing and active ginning factories in Punjab
2. Textalks, "Cotton arrival at Pak ginneries down 26.41% as on September 15", on fortnightly PCGA arrival reports and operating factories
3. Net billing facts are carried over from our net metering and net billing guide, which lists its own sources, including the NEPRA (Prosumer) Regulations, 2026, SRO 251(I)/2026: https://ke.com.pk/wp-content/uploads/2026/04/8.-NEPRA-Prosumer-Regulations-SRO-251I2026-09-02-26.pdf