Solar Finance & Payment Options

Most solar finance pages start with the loan. Ours starts with the survey — because until an engineer has stood in your loft, checked your consumer unit and measured your roof, any monthly figure is a guess, and a guess is a poor thing to sign a credit agreement against.

Here is the sequence when you spread the cost with Lumos:

• Free survey within five days. Matt Butler, our lead engineer, or one of our employed surveyors visits — we don't use commissioned sales reps, so nobody's pay depends on what you sign. We assess the roof, the fuse board and how you actually use electricity.
• A fixed, itemised quote. You get one written price for the complete solar panel installation — panels, inverter, battery if you want one, scaffolding, commissioning and MCS certification. No "manager's discount", no expiry-at-midnight tactics.
• Then, and only then, the money conversation. Pay in full, or apply for 0% APR finance through our FCA-regulated lending partner. We enter the system price and your chosen deposit and term; the lender runs its own credit and affordability checks; the agreement is signed electronically — at the kitchen table if we're with you, or later from your sofa.
• Install and handover. Approval doesn't change the job: same employed team, same equipment, same aftercare. Your first payment is typically collected around a month after commissioning — the agreement states your exact date.

Nothing is submitted to the lender until you have seen the precise monthly figure in writing, and a declined or withdrawn application costs you nothing — the quote stands if you'd rather pay cash, save up, or borrow elsewhere.

One boundary worth drawing: this page explains how paying monthly works through us. If you want the whole landscape — personal loans, remortgaging, why the old "free solar" schemes went wrong — our guide to solar finance options UK walks through every route with the sums attached. Read that to choose a route; read this to see what happens once you choose ours.

The eligibility bar is the standard one for regulated point-of-sale credit, not something exotic:

• You're 18 or over and a UK resident;
• You own the property where the system is being installed (the agreement sits in the homeowner's name);
• You pass the lender's credit and affordability checks — their decision, not ours.

Retired and self-employed customers apply on the same basis; the lender looks at affordability in the round rather than payslips alone. Have your bank details and basic income information to hand and the application itself takes minutes.

Deposits are a dial, not a hurdle. Put down more and the monthly payment falls in a straight line: at 0% APR, every £1,000 of deposit takes roughly £28 a month off a 36-month agreement, or about £17 off a 60-month one. Some customers put down a third and finance the rest; others finance the lot and leave their savings untouched. There is no interest penalty either way.

Term choice is where 0% flips normal loan logic. With an interest-bearing loan, stretching the term costs you more in total, so shorter feels prudent. At 0% APR the total repaid equals the cash price whatever the term — so the longest available term is usually the rational pick: the smallest committed monthly outgoing, your cash left earning interest, and a statutory right under the Consumer Credit Act to settle a regulated agreement early if you'd rather clear it. Settling a 0% agreement early doesn't save you interest (there is none) — it simply ends the commitment sooner.

The same agreement can cover the whole installed system, not just panels. Adding battery storage raises the price but usually improves the return per pound, because stored solar offsets electricity you'd import at around 27p/kWh rather than earning roughly 10.8p/kWh as export. For what complete systems actually cost around here — and what moves the number — see our breakdown of solar panel costs Wiltshire.

There's no commission riding on this answer — our surveyors are salaried — so here's the comparison exactly as we'd give it across a kitchen table in Melksham or Portishead.

The worked example. A typical 4kWp system in our region generates around 3,900kWh a year. With imported electricity at roughly 27p/kWh and a decent export tariff paying about 10.8p/kWh — see Smart Export Guarantee explained for how to register and which tariffs pay properly — that's £950–£1,100 a year off your bills, or £79–£92 a month.

Put that against the repayments: a £6,500 solar-only system over Net cost while you're repaying: £16–£29 a month — and once the term ends, the full saving is yours for the remaining decades of panel life. Because 0% adds nothing to the price, payback stays at the same 7–9 years a cash buyer gets. That is the entire case for 0% finance in two sentences: same total, same payback, without emptying your savings.

When cash still wins. If the money is sitting idle, you dislike credit agreements on principle, or you want no monthly commitments in retirement, pay cash — the price is identical and we genuinely don't mind. Cash also suits anyone planning to move within a couple of years, since a finance agreement must be settled when you sell.

The timing argument applies to both. Domestic solar and battery installations are zero-rated for VAT only until 31 March 2027, after which the rate is due to return to 5% — roughly £475 added to a £9,500 system. That deadline doesn't care how you pay; it cares when the installation happens.

One honest caveat: the savings figures assume reasonable daytime use, or a battery to shift consumption into the evening; an empty house on a cheap fixed tariff will land lower. For a deeper treatment of the repayment-versus-savings crossover, our analysis of 0% solar finance in the UK for 2026 models three household types month by month.

Every solar firm says "no pressure". The useful question is what actually stops them. In our case, three layers of paperwork do.

RECC membership. We're bound by the Renewable Energy Consumer Code, which prohibits high-pressure selling outright — no fake time-limited discounts, no refusing to leave until you sign. Our quotes stand, in writing, while you gather other prices. RECC also sets rules on deposits and cancellation and gives you an independent complaints route if we ever fall short.

Consumer contract law. Contracts signed in your home carry a 14-day cooling-off period under the Consumer Contracts Regulations — sign on Tuesday, change your mind the following week, walk away.

The finance itself adds protection cash can't match. A regulated agreement puts an FCA-regulated lender's compliance obligations between you and any mis-selling, with the Financial Ombudsman behind that. And under Section 75 of the Consumer Credit Act, where goods with a cash price between £100 and £30,000 are bought on linked finance, the lender is jointly liable with the supplier for breach of contract or misrepresentation — virtually every domestic solar system falls inside that band. If a financed installer vanished mid-warranty, the lender would share the liability. It's a genuine, and rarely mentioned, argument for paying monthly even when you could pay cash.

Behind the paperwork sits the ordinary evidence: 50+ Google reviews, an employed installation team rather than subcontract crews, and MCS and NICEIC certification on every job. We arrange finance on installations across Wiltshire, North Somerset, South Gloucestershire, Somerset and West Berkshire — see our solar panels Melksham page for how we specify systems minutes from our Broughton Gifford base, or solar panels Chippenham for households up the A350.

And if any part of the agreement is unclear at survey, we'd rather you didn't sign that day. The quote will still be true on Thursday.