How much does a solar panel lease cost?

There is no list price for a solar panel lease. Unlike a piece of hardware with a sticker on it, a lease is a rental contract, and the cost is the stream of payments you agree to make over the term. So the honest answer to “how much does a solar lease cost” is: it depends on the size of the system, the length of the term, and how a lender reads your business. What follows is how the pricing actually works, the one test that decides whether a lease is good value, and how leasing stacks up against owning the system outright.

How a solar lease is priced

A solar panel lease is priced as a periodic rental — usually monthly or quarterly — calculated from four inputs.

The four things that move the number

• System size and installed cost. The rental is built on the capital value of the equipment. A £60,000 rooftop array carries a smaller rental than a £400,000 ground-mount or warehouse-roof system. This is the single biggest driver.
• Term. Commercial solar leases typically run 5 to 10 years. A longer term lowers each individual rental but increases the total you pay across the contract, because the funder’s cost of capital is spread over more payments.
• Your covenant. Lenders price risk. A profitable business with several years of clean filed accounts is cheaper to fund than a thin-covenant or newly incorporated one. Strength of covenant feeds directly into the rate baked into your rental.
• Residual and structure. Whether it is a finance lease (you effectively take the asset’s whole economic life) or an operating lease (the funder retains a residual value and you rent the use of it for a shorter period) changes how the rental is set.

Because all four interact, two businesses installing the same array can be quoted materially different rentals. That is why a real quote — not a calculator guess — matters, and why we broke the cost of commercial solar down route by route rather than quoting a single figure.

A rough shape, not a quote

To make this concrete: a mid-sized commercial system in the £100,000–£150,000 range, financed over seven years, commonly produces rentals somewhere in the low-thousands of pounds per month. We deliberately avoid pinning a rate here because the covenant and term swing it too far to be useful as a number on a page. Use the finance calculator to model your own system size and term, then treat the output as an indication to be confirmed against a live quote.

The test that actually matters

The headline rental is the wrong thing to fixate on. The test that decides whether a solar lease is worth signing is simple:

Does the energy the system saves and exports each month exceed the rental you pay?

A well-specified commercial array sized to your daytime load typically generates electricity at a lower cost per unit than you buy from the grid, and pays you for any surplus you export under the Smart Export Guarantee. If the combined value of avoided grid purchases plus export income is greater than the rental, the system is paying for itself from day one and the lease is cash-flow positive over its life. If the rental is set higher than the saving, no amount of low headline rate makes it a good deal.

This is why “how much is a solar lease” is the second question, not the first. The first question is how much the system saves. We size the system to the load before we price the finance, so the rental is anchored to a saving you can actually bank.

What you do — and do not — get with a lease

A lease costs less in upfront cash than buying, but the rental is not the only part of the picture. There are two trade-offs worth understanding before you compare.

Tax and ownership

Under a finance lease, the lessor — not your business — usually claims the capital allowances on the solar equipment, and passes that benefit to you indirectly through a lower rental. Solar PV is special-rate (integral-feature) expenditure, so when a business does own it the relief comes through the Annual Investment Allowance at 100% on up to £1m a year, with a 50% first-year allowance on spend above that — both permanent. Solar does not qualify for 100% full expensing, which is restricted to main-rate plant. Under an operating lease your business gets no allowances at all, but the rentals are fully deductible against profits as an operating cost.

Either way, lease rentals are a deductible expense. And for a VAT-registered business the VAT on the equipment is reclaimable — with a lease, that VAT is spread across the rentals rather than paid up front as it would be on a hire purchase or loan.

The balance sheet from 2026

There is a change worth flagging for finance directors. The revised FRS 102 brings most leases on-balance-sheet for lessees, for accounting periods beginning on or after 1 January 2026, with exemptions for short-term and low-value leases. In practice that means an operating lease that once sat off your balance sheet will now usually appear as a right-of-use asset and a corresponding liability — relevant if you watch gearing covenants.

Leasing versus owning: the real comparison

The total you pay across a lease term will exceed the cash price of the same system, because you are paying the funder for the use of their capital. That is the cost of not tying up your own cash. The question is whether keeping your capital working elsewhere — and keeping the rental below your energy saving — is worth more to you than the lower lifetime cost of owning.

The decisive difference is not the monthly figure but who keeps the value:

• Own it — through hire purchase, an equipment loan, or cash — and the business keeps the capital allowances and the Smart Export Guarantee income. The system is your asset.
• Lease it and you keep the energy saving but the allowances flow through the lessor; you still keep the export income, which the operator does not.
• Sign a PPA and the third-party funder keeps the allowances and the SEG export income, and owns the asset. You only buy the power.

That last point is the core of why we usually steer taxpaying businesses towards owning via asset finance rather than a PPA: owning keeps both the tax relief and the export income inside your business. A lease sits between the two — lighter on cash than buying, but it surrenders the allowances. Which route wins depends entirely on your tax position and how you value upfront cash, and it is worth comparing all of them across the full range of finance structures before you commit.

Working out your own number

The only reliable way to know what a solar lease will cost your business is to size the system to your load, model the saving, and get a covenant-based quote against it. A lease that looks expensive on rental can be the right call if it is cash-flow positive from month one; a cheap-looking one is a bad deal if the saving does not clear it.

If you would like rentals priced against a real system size and your actual covenant — alongside the hire purchase and loan options for comparison — request a no-obligation quote and we will model the routes side by side so you can see exactly what each one costs over the term.