Solar for Printing Presses

This guide is for commercial offset printers, publishers, label and sticker printers, and print-and-finishing shops in Punjab. Corrugated box and carton plants, where the corrugator is the main load, are covered in our guide to solar for paper and packaging mills.

Where the power goes in a press

Every press is different, so the table below shows the typical pattern, not your numbers. Your real loads come from the machine plates, the manuals and a site survey.

Two things stand out. First, drying and curing can draw as much as the press drive itself, so they matter for inverter and solar sizing. Second, the sensitive loads (CTP and design computers) are small, which makes them cheap to protect with a battery.

Diagram

Printing presses

Presses

Large motors by day

Quality

Voltage stability matters

Deadlines and outages: the real cost

A printer's biggest power problem is not the bill. It is a trip half-way through a job that must leave the building tomorrow morning.

When the supply drops mid-run, a press stops with ink in the units and sheets in the feeder. Restarting means waste sheets, cleaning, fresh make-ready and colour matching. On a UV line, lamps need time to restrike after a cut. A plate processor that stops part-way can spoil plates.

This is why the backup design matters as much as the solar plant:

• On-grid solar alone does not help in an outage. Standard on-grid inverters switch off when the grid fails, for safety.
• Generator integration keeps heavy loads running. If you already run a gas or diesel generator, a hybrid controller lets solar share the load with it without back-feeding or underloading the set. See our solar and generator hybrid guide. We do not sell generators, but we integrate existing sets.
• A battery protects the sensitive part. A hybrid inverter with a battery can carry pre-press, the CTP unit, servers, lights and controls. How quickly backup takes over depends on the inverter and wiring. Our guide to hybrid inverter transfer time explains this.
• BESS for the whole press is possible but expensive. A larger battery system can bridge the gap until a generator starts, or carry a press to the end of a sheet run. Read battery storage (BESS) for factories before deciding whether that pays for your plant.

Sizing solar for a press under net billing

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 cannot exceed your sanctioned load, and the rules refer to three-phase 400 V and 11 kV consumers. Our net metering and net billing guide explains the details.

For a press, this means sizing to the daytime load you actually run, not to the roof:

• One-shift press: size close to the day-shift base load, including compressors, AC and at least one press with its dryer.
• Two-shift or seasonal press: many printers run late before exams, elections and the new school year. Size to the normal day, and let the grid and generator carry the peaks and nights.
• Closed days: on Sundays and holidays most solar output is exported at the lower rate. Count those days honestly in any estimate.

Our guide to sizing under net billing shows the method. Most presses are on three-phase supply; see three-phase vs single-phase inverters.

How to estimate the benefit yourself

We do not publish savings figures. The numbers below are round illustrative values only.

For example, if a press uses about 600 units on a normal working day, mostly between 9 AM and 6 PM, and a solar plant sized to that load produces about 400 units on a clear day, most of those 400 units are used on site at your full tariff. On a closed day, the same plant exports most of its output at the lower rate. Multiply each part by the right rate, then allow for winter, smog and cloudy days. A good proposal shows this from your own bills and states its assumptions.

Power quality, demand charges and power factor

Modern presses use variable drives, and UV systems use electronic power supplies. Both can add harmonics to the supply. We check supply quality before adding inverters; see harmonics and power quality.

Bigger presses on industrial tariffs also pay a demand charge based on MDI. A press's peak usually comes when several machines and dryers start together in the morning. Staggering start-ups is free and often does more than any equipment. Solar can lower daytime peaks on sunny days, but not reliably, because a cloud at the wrong moment still sets the peak. See MDI in your electricity bill and power factor and solar, since solar changes the measured power factor on motor-heavy sites.

Fire safety in a paper and solvent building

A press stores paper, board, inks, solvents and cleaning chemicals. That changes where the solar equipment goes.

• Keep inverters, batteries and combiner boxes in a separate ventilated room, away from paper stock and solvent stores.
• Fit clearly marked DC isolators so roof strings can be isolated quickly.
• Leave fire access paths on the roof and do not block smoke vents or skylights.
• Keep cable routes away from waste paper and rag bins.

Our solar fire safety guide covers the general rules for rooftop systems and lithium batteries.

Roofs, dust and cooling

Many presses work from older commercial buildings or plaza ground floors, where the roof is shared or partly used by tanks and AC units. Elevated structures keep panels clear of walkways and machinery; shared buildings need written roof permission first. Our guide on commercial solar for shops and plazas covers shared roofs. Paper dust and city smog both settle on panels, so plan simple, safe access for cleaning.

Press halls are often air-conditioned to keep paper flat and colour consistent. Inverter ACs suit solar well; see solar for AC.

Solar price for a printing press

Press projects are quoted per site after a survey and design.

Our projects start at about 6 kW.

What to prepare before a site survey

Our energy audit before industrial solar guide explains how to measure. For a press, bring:

1. Twelve months of electricity bills, including MDI if shown.
2. A machine list: presses, dryers or UV systems, compressors, CTP, finishing equipment, with plate ratings.
3. Your running pattern: shifts, busy seasons and closed days.
4. Generator size, fuel and running hours.
5. Which loads must never stop, and which can wait for the grid.
6. Roof photos or drawings, and the owner's permission if the building is rented.

How Solar Works Pakistan works with presses

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 design systems 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. Hybrid systems with grid, generator and battery are a core part of our work.

Major equipment carries the manufacturer's warranty per product. Our structures carry a 3-year Solar Works Pakistan structure warranty, and our service warranty covers the first year under applicable project terms. After a complaint is registered, we target sending service personnel within 48 hours to begin diagnosis. See our industrial and commercial solar page.

Get today's price or a free site survey

Send your bills and machine list. Our engineers will tell you plainly which loads solar should carry and what backup your deadlines need.

• 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

Can a printing press run on solar?

Partly. Solar can carry a large share of the daytime load: presses, dryers, compressors and AC. The grid and a generator still carry the nights, peaks and outages, and a battery protects sensitive pre-press equipment.

Will solar keep my press running during load-shedding?

Not on its own. Standard on-grid inverters switch off when the grid fails. To keep printing, solar has to work with a generator through a hybrid controller, or with a battery system sized for the load.

Are UV dryers too big for solar?

They are a heavy load, but solar does not run one machine directly; it feeds the whole building's supply. The question is how much of your total daytime load solar covers. UV lamp power comes from the maker's data and shapes the inverter and plant size.

Which press loads should go on the battery?

Usually the CTP unit, design computers, servers, lighting and machine controls. These are small and costly to interrupt. Running full presses and dryers on a battery needs a much larger system and should be justified by your own outage costs.

Is solar worth it for a small print shop?

It depends on daytime use and roof space. A shop that runs digital printers and finishing machines through the day can use most of its solar output on site. Our projects start at about 6 kW, so very small shops should check their bills first.

Does a press need three-phase supply for net billing?

The 2026 net billing rules refer to three-phase 400 V and 11 kV consumers, and most presses are already three-phase. Confirm your own connection and sanctioned load with your DISCO before design.

Sources

1. 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