Covering Small Warehouses to Acres of Farmland
we design and install commercial solar PV systems built around your site. Based in Crawley, we're specialist commercial solar installers working with businesses across Sussex, Surrey and the wider South East.
Cut utility costs
Improve EPC rating
Boost asset value
Increase profit
How Much You Could Save
A commercial solar system generating 1kWp produces around 850–950kWh a year in the South East.
Every 10kWp installed saves in the region of £2,100–£2,800 a year before battery storage is factored in.
25kWp system
£5.2k–£7.2k
saved per year
50kWp system
£10.5k–£14.1k
saved per year
100kWp system
£21.3k–£28.5k
saved per year
250kWp system
£53k–£71k
saved per year
Battery storage increases these savings further
Payback typically lands between 4–8 years
Commercial Solar Packages
Find the right solar and battery setup for your business, with finance options available to make it easy to get started.
Solar Only
25kW commercial solar system
- 25-year manufacturer warranty
- iOS and Android app monitoring
- Full supply & installation
- Scaffolding included
- Bird protection included
- Finance options available
Solar Only
50kW commercial solar system
- 25-year manufacturer warranty
- iOS and Android app monitoring
- Full supply & installation
- Scaffolding included
- Bird protection included
- Finance options available
Solar & Battery Storage
50kW commercial solar system + battery storage
- 25-year manufacturer warranty
- iOS and Android app monitoring
- Full supply & installation
- Scaffolding included
- Bird protection included
- Finance options available
No Two Businesses Are The Same
A full roof and site assessment. A breakdown of your current energy usage. Let us build your bespoke solar package around your business
Book Your Free Site Survey!Ways to Fund Your Solar Installation
We offer several ways to fund your commercial solar installation, so cost doesn't have to be the reason you wait.
Upfront cost
Full
Upfront cost
Spread
Upfront cost
None
Outright purchase
Own the system outright from day one, with the fastest payback.
Flexible finance
Spread the cost over 3–10 years to match your cash flow.
Power Purchase Agreement
No upfront cost. We install, own and maintain the system. You pay a fixed rate for the electricity it generates, typically below your current tariff.
Many businesses can also offset the cost further through capital allowances against corporation tax.
See How Much You Could SaveCommercial battery storage
Business Battery Storage and Backup Power in Sussex, Surrey and Kent
Commercial battery storage turns a solar array into a controllable asset. Store cheap or self-generated power, use it when grid prices peak, and keep critical equipment running through a power cut. We design and install commercial battery systems from 20kWh for a small unit up to large-scale battery storage for warehouses, farms and industrial sites, using FoxESS, Tesla and Sigenergy hardware.
Peak shaving and tariff arbitrage
Charge overnight on a cheap tariff, discharge between 4pm and 7pm when unit rates and capacity charges are highest. For sites with a half-hourly meter this alone can cut the electricity bill by a fifth.
Battery backup for commercial properties
Seamless backup for servers, refrigeration, tills, security and production lines. We size the battery to the loads you cannot afford to lose and install an automatic changeover so nobody has to touch anything when the grid drops.
Use more of your own solar
Businesses that close at 5pm export most of their afternoon generation for pennies. A battery keeps that energy on site for the evening clean, security lighting and early starts, lifting self-consumption from around 50% to over 85%.
Manor Royal is our home ground
Our head office is on Manor Royal, one of the largest business parks in the South East, so we understand the roof types, DNO constraints and half-hourly tariffs that Crawley and Gatwick-area businesses deal with. We have completed over 2,000 installations since 2011, hold MCS, NICEIC, CHAS and TrustMark accreditation, and use our own in-house team on every commercial job.
Worked example using the figures above: a 25kWp system at £14,999 saving £5,200 to £7,200 a year pays for itself in roughly two to three years before finance costs. Larger systems with battery storage typically land between four and eight years, and the panels keep producing for 25 years or more.
Maximise Your Solar Power With a Battery Storage System
Pair your solar panels with battery storage to cut grid reliance, lower your bills further, and get more from every kWh you generate.
Commercial Solar FAQs
Everything you need to know before switching your business to solar.
What size commercial solar system do I need?
Sizing depends on your energy consumption, available roof or ground space, and budget. Small offices or retail units may suit 10–30kWp, while warehouses and industrial units typically need 50kWp or above. We provide a free site survey and size your system based on real consumption data.
How much can a business save with commercial solar panels?
Savings depend on your tariff, consumption and system size. A recent 60kWp installation in West Sussex is saving the client over £20,000 a year, with payback under 5 years. Combined with battery storage, businesses can cut grid electricity use by 60–80%.
Do you offer finance or Power Purchase Agreements for commercial solar?
Yes. We offer outright purchase, solar finance spread over 3–10 years, and Power Purchase Agreements (PPA) with no upfront cost — you simply buy the electricity generated at a fixed rate below your current tariff.
Is commercial solar installation MCS accredited?
Electrotec is fully MCS-accredited for commercial solar up to 50kWp. For larger systems above 50kWp, where MCS doesn't apply, we work to the same exacting standards, ensuring full DNO compliance and grid connection at every scale.
How long does a commercial solar installation take?
Most small to medium installations are completed within 2–5 days. Larger systems requiring DNO notification, planning permission or grid upgrades may take longer. We manage the entire process from survey to commissioning as your single point of contact.
What commercial sectors do you install solar panels for?
We install for retail units, office buildings, industrial and manufacturing facilities, warehouses, logistics centres, agricultural buildings, farms, education establishments and commercial landlords across West Sussex, East Sussex, Surrey and the wider South East.
Can commercial solar panels help with EPC ratings?
Yes — solar PV generation can positively impact a commercial property's EPC rating by reducing calculated energy demand from the grid, which is increasingly relevant for landlords facing minimum EPC requirements. We can advise on likely impact during your free survey.
Do commercial solar installations require planning permission?
Most commercial rooftop solar is permitted development and doesn't require planning permission. Ground mount systems, listed buildings and some larger systems may need consent. We assess this during your survey and can manage applications on your behalf.
Can you install solar panels on a commercial flat roof?
Yes — flat roof commercial solar is one of our most common installation types. We use ballasted mounting systems that require no roof penetrations, protecting the roof membrane while achieving the optimal panel angle for year-round generation.
What is the payback period for commercial solar panels?
Typically 4–8 years depending on system size, consumption and tariff. Our recent 60kWp West Sussex installation has a projected payback under 5 years, with a 25+ year system lifespan. Every quotation includes a full financial model and 25-year ROI projection.
Can commercial battery storage be installed without solar panels?
Yes — standalone battery storage is popular for businesses on time-of-use or half-hourly metered supplies. It charges overnight on cheap off-peak rates and discharges during expensive peak hours, cutting costs immediately with no solar panels required.
Do you cover commercial solar installations across West Sussex?
Yes — based in Crawley, we install commercial solar across West Sussex, East Sussex, Surrey and the wider South East, including Horsham, Haywards Heath, Gatwick, Reigate, Worthing, Brighton and Maidstone. We can typically survey and quote within days.
What happens to surplus electricity generated by commercial solar?
Surplus electricity not used or stored is exported to the grid under the Smart Export Guarantee (SEG), earning a payment per kWh exported. Battery storage helps maximise self-consumption, which is always more valuable than exporting.
How do I get a commercial solar quote from Electrotec?
Contact us via our website or by phone to arrange a free commercial site survey. We'll assess your roof or ground space, review your energy consumption data, and produce a full written proposal with system design, generation estimates and payback projection — at no cost.
Still got questions, that need answering?
Contact us
