0% VAT on Home Batteries Ends in 2027

There is a date in the tax calendar that affects anyone thinking about a home battery: 31 March 2027. Until then, battery storage installed in a home in Great Britain is zero-rated for VAT. From 1 April 2027, it moves to the reduced rate of 5%.

It isn’t a grant, and it isn’t a deadline anyone should panic about. But it is real money, and it’s worth understanding properly rather than hearing about it for the first time from a salesperson using it as a closing line.

What the relief actually is

The energy-saving materials relief has zero-rated the supply and installation of qualifying kit in residential property since April 2022. Solar PV and heat pumps were in from the start. Battery storage was added in February 2024, and (this was the important part) the extension covered standalone and retrofit batteries too, not just ones fitted at the same time as panels.

Before that change, a battery bought on its own carried 20% VAT while an identical battery installed alongside solar didn’t. That was a genuinely daft distinction, and it’s gone.

Crucially, the relief applies to the whole installed job: the battery, the inverter, the cabling and the labour. It’s a supply-and-install relief, which is why buying a battery online and finding an electrician afterwards doesn’t get you there.

What changes on 1 April 2027

The zero rate ends and the reduced rate of 5% applies instead. It doesn’t revert to 20%: that’s the misunderstanding we hear most often. Energy-saving materials keep a preferential rate either way; the current window is simply better than the one that follows it.

Tax rules can and do change at a Budget, so nothing here is guaranteed to stay exactly as written. As things stand today, though, 31 March 2027 is the end of the zero rate.

What it’s worth in real money

Apply 5% to the systems people actually buy and the numbers are modest but not trivial.

A 6-panel array with a 10 kWh battery starts from around £6,500, so roughly £325 of VAT on the same job after the change. A 12-panel system with 10 kWh of storage from around £7,770 would attract somewhere near £390. A 20-panel system with 10 kWh from around £10,000 lands near £500.

Call it £300–£500 on a typical domestic install. Worth having, and worth knowing about. Not, on its own, a reason to buy something that doesn’t otherwise stack up.

The honest view on timing

We install these systems for a living, so treat what follows with appropriate scepticism, but here it is anyway.

A home battery is a ten-to-fifteen-year decision. The VAT position is worth a few hundred pounds. Sizing the system correctly, siting it somewhere sensible and pairing it with the right tariff are each worth considerably more than that over the life of the kit. If the choice is between a rushed install before a tax deadline and a well-specified one after it, take the well-specified one every time.

What the date does sensibly influence is the order you do things in. If a battery is already on your list for the next eighteen months (you’re on a smart tariff and not making the most of it, or you have panels exporting at around 12p that you’d rather be using at home against 24p grid electricity), then there’s no advantage in drifting past March 2027 for no particular reason.

If you’re not sure a battery is right for your house yet, the answer is to find that out, not to buy one because of the VAT.

What to check before you commit

Ask any installer to show the VAT treatment clearly on the quote rather than as an unexplained line. Check they’re MCS accredited: it governs the standard of the work, the distribution network notification and your eligibility under the Smart Export Guarantee. And be wary of a quote produced without anyone looking at your property, because the things that determine whether a battery earns its keep (your consumption pattern, your tariff, where the unit can physically go) aren’t visible from a postcode.

If you’d like to know whether storage makes sense for your home, and what it would cost with the VAT position set out plainly, our survey is free and carries no obligation. If the honest answer is that a battery won’t pay for itself in your circumstances, we’d rather tell you that than sell you one.