80kW Commercial Solar Panel System UK

The right fit

Why a 80kW system could be the right fit

An 80kW commercial solar system suits warehouses, large factory units, leisure facilities and religious buildings with annual electricity demand of 70,000 to 105,000 kWh. It uses 160 to 180 panels across 360 to 430 square metres of roof, typically on a single large aspect.

These buildings combine large unshaded roof areas with strong daytime operating hours, which means high self-consumption and a strong return. Three-phase supply is standard at this size, and the system is eligible for the Annual Investment Allowance, business rates exemption to April 2035 and 20% reclaimable VAT.

The datasheet

80kW spec sheet

Indicative figures for a 80kW commercial system on a typical UK site. Your exact output depends on your roof, orientation, shading and usage, confirmed in a site visit.

System size80 kW DC

Solar panels160-180

Roof space360-430 m²

Site demand70,000-105,000

Annual output68,000

Self-consumption80-95%

VAT20% reclaimable

Capital allowanceAIA-eligible

Business ratesExempt to 2035

Panel warranty25 yrs

Indicative, not a quote · final figures after a free roof assessment.

What is included

160-180 tier-one panels

High-efficiency panels, sized to deliver 80 kW DC across your commercial roof.

Commercial inverter (three-phase)

A quality inverter, three-phase ready, with capacity for battery and peak-shaving.

Mounting, wiring & connection

All roof mounting, cabling and grid connection, done neatly and safely.

Commercial monitoring dashboard

Live generation and consumption data for your facilities team, set up before we leave.

Full MCS install + AIA guidance

Fitted under our own MCS registration, with AIA capital-allowance guidance for your accountant.

25-year panel warranty

Plus a team you can still call after switch-on. Every job certified under our own MCS registration.

On real UK rooftops

Sized for your building, fitted under our own MCS registration

Every 80kW system is designed around your site’s demand profile and usage, then installed by the same MCS-certified team that assessed it. Certified under our own MCS registration, no remote sales centre, 3,000+ UK homes and counting.

Storage

80kW: self-consumption and battery

Panels only

Good if you use power in the day

The panels power the site during working hours and export the surplus for a payment under SEG. Ideal if your demand is daytime: production, refrigeration, machinery or EV charging while the sun is up.

Panels + battery

The most common upgrade

Battery storage shifts daytime solar into evening, out-of-hours and peak-rate periods, lifting self-consumption further and cutting demand charges. Sized to your load profile during the design stage.

The right size?

Is 80kW enough for your site?

For businesses using 70,000 to 105,000 kWh a year, an 80kW system covers a large share of daytime demand, with plenty of roof area on most warehouse and factory buildings.

If your demand is lower a 70kW system may suit; if higher, a 100kW system or larger. We size precisely from 12 months of your meter data, and design in battery storage or commercial EV charging where they strengthen the case.

How it works

Go commercial solar in three steps

STEP 01

Site visit + structural assessment

A local engineer visits, assesses your roof for pitch, orientation and shading, and designs a 80kW system around your actual demand profile. No cost, no obligation.

STEP 02

Fixed-price commercial proposal

A clear, itemised commercial proposal with AIA modelling guidance for your accountant. We handle all paperwork and grid approvals as standard.

STEP 03

Installation & commissioning

Our in-house team completes installation in one to three weeks on site. Tested, MCS-certified and the commercial monitoring dashboard set up before we leave.

Why Solar4Good

Engineer-led, in-house, UK-wide

You work with a UK-wide commercial team based in Harrow, not a remote sales centre. The person who assesses your roof is directly involved in designing the system, and once it is in we handle MCS certification, SEG export-tariff setup and your monitoring app, so you are never left navigating the process alone.

3,000+UK installs

50,000+Panels installed

4.9★from 1,000+ reviews

MCSCertified, in-house

Rated 4.9/5 from 1,000+ verified reviews on Trustpilot, TrustATrader and Google

“George the sales chap was straightforward and honest, and the whole installation team were awesome, courteous and professional throughout.”

Jamie Wilson · Verified Trustpilot review

“From start to finish the whole job has been seamless. The install guys were polite, knowledgeable and efficient.”

Timothy Clarke · Verified Trustpilot review

“I wholeheartedly recommend this company for solar and battery storage installation.”

Soham Acharya · Verified Trustpilot review

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Good to know

The questions businesses actually ask about a 80kW commercial solar system.

Is an 80kW system right for a warehouse or factory?

An 80kW system suits warehouses, large factory units, leisure facilities and religious buildings with annual demand of 70,000 to 105,000 kWh. Large roof areas and daytime hours make for high self-consumption.

How many panels are needed for 80kW?

160 to 180 panels across roughly 360 to 430 square metres of roof, sized to deliver 80 kW DC, typically on a single large roof aspect.

What is the business case for commercial solar?

Commercial solar is eligible for the Annual Investment Allowance, business rates exemption to April 2035, and 20% reclaimable VAT. With high daytime self-consumption, payback is typically faster than an equivalent residential system.

Do you carry out a structural assessment?

Yes. Every commercial project starts with a site visit and structural assessment. A qualified engineer reviews roof type and load capacity and, where available, 12 months of half-hourly meter data to design around your actual demand.

Who installs it, and do you handle the paperwork?

Most installations are carried out under our own MCS registration. Further afield we use installers working under our MCS registration, and the certificate and workmanship warranty remain ours. We handle all paperwork, grid approvals, MCS certification and AIA modelling guidance for your accountant.