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Battery storage

Store your solar. Use it when it matters.

Solar panels generate in the day; homes use most power in the evening. A battery closes that gap — storing your own electricity so your lights, appliances and heat pump can run on it after dark.

Get a free quote Call 01269 833100
MCS certified installer 20+ years' experience Design and installation in-house
Why a battery

Keep more of the electricity you generate.

Without storage, surplus solar exports to the grid. With it, that surplus becomes your evening's electricity — how much that's worth depends on your tariff and how you use power, and we'll be straight with you about whether it stacks up.

Solar after sunset

Store what your panels generate in the day and draw on it in the evening — the hours when most homes use the most electricity and grid prices are at their highest.

Load shifting on smart tariffs

On a time-of-use tariff, a battery can also charge from the grid when electricity is cheap and supply your home when prices rise — useful even on days when the sun doesn't cooperate.

Evening heating on stored power

A heat pump runs on electricity, so a charged battery keeps it running on your own stored solar after dark — the evening half of the solar-plus-heat-pump story.

0% VAT until March 2027

Residential battery storage installations are currently zero-rated for VAT until 31 March 2027 — the quote you receive is the price you pay.

How it works

Generate, store, use — and export what's left.

Generate or import

Your panels generate in the day — or the battery charges from the grid on a cheap overnight rate.

Store the surplus

Excess energy charges the battery instead of exporting straight to the grid.

Use it when it matters

Your home draws on stored power in the evening and at peak rates, before importing anything.

Export what's left

Anything still spare exports and earns under the Smart Export Guarantee.

Flat cross-section of a two-storey UK home fitted with a rooftop solar photovoltaic array, a hybrid inverter, a battery, a smart meter, a consumer unit and an indoor heat pump. It shows one moment: a sunny afternoon, when the array is covering the whole house and the surplus is charging the battery. Direct current runs from the array through the loft and down to the inverter, which converts it to alternating current for the consumer unit; from there separate final circuits feed the household lights, sockets and appliances and, on its own circuit, the heat pump. The grid connection - a pole in the garden, an overhead service to the meter on the outside wall, and the meter tail through to the board - is drawn in full but is idle at this moment and shown in grey. The heat pump combines that electricity with environmental warmth collected from the ground, the air or water, and sends useful heat to underfloor heating, a first-floor radiator and the coil inside the hot-water cylinder. The refrigerant is sealed inside the machine and is shown both in its real service window and enlarged in a detail circle. The tap water is kept completely separate from the heating water.

Scroll the picture sideways to see all of it. Every label is written out below.

Solar panels, a battery and a heat pump, working as one system

What is in the picture

  • Environmental warmth collected from the ground, air or water Warmth from your energy source
  • Heating water: warm out to the home, cooler back Hot-water cylinder; MasterTherm AquaMaster heat pump; Heating coil - heating water never mixes with your tap water; Underfloor heating in the screed; Underfloor manifold; Radiator
  • Tap water, kept completely separate from the heating water Your shower and taps; Cold water mains
  • The grid connection, drawn but not running at this moment Electricity meter; Grid connection
  • Alternating current from the inverter to the board and the house Consumer unit - the fuse board; Lights, sockets and appliances; The heat pump is a load like any other
  • Direct current from the roof to the inverter and the battery Solar PV array on the roof; Direct current to the inverter; Inverter - turns DC into AC; Battery - stores the surplus
  • Refrigerant sealed inside the heat pump

The four steps inside the heat pump

  1. 1 Collect evaporator Environmental energy warms the refrigerant until it boils. It leaves as a warm gas at low pressure.
  2. 2 Squeeze compressor Electricity drives the compressor, squeezing that gas into a much smaller space. It leaves hot and at high pressure.
  3. 3 Release condenser The hot gas hands its heat to your heating water and condenses. It leaves as a hot liquid, still at high pressure.
  4. 4 Reset expansion valve A valve drops the pressure and the liquid flashes cold. It leaves as a cold mist, ready to collect more.
The full system

Solar, storage and your heat pump — designed as one.

Generate with solar PV, store the surplus, and run your heating on it in the evening. When the three are designed together, each part is sized around the others instead of bolted on afterwards.

Already have solar? Batteries can be retrofitted to most existing systems — we'll assess your current inverter and recommend either AC-coupled storage or a hybrid-inverter upgrade, whichever suits your setup.

There's also a thermal alternative: instead of storing electricity, a thermal store holds heat for your hot water. If hot water is the main goal, it can be the more cost-effective route — we'll advise which fits your home.

Solar inverter and battery storage units installed in a domestic garage
Questions

Battery storage, answered honestly.

In most cases, yes. We assess your current inverter and recommend the right route — an AC-coupled battery that works alongside it, or upgrading to a hybrid inverter. Either way the design is checked against your actual generation and usage first.

Only if the system is specifically configured for backup — it isn't automatic, and many standard installations shut down with the grid for safety. If backup matters to you, tell us at the design stage and we'll specify a system that provides it.

Modern lithium home batteries typically carry warranties of around 10 years, with capacity gradually reducing over their life rather than failing outright. We'll give you the actual warranty terms for the specific equipment in your quote rather than a generic promise.

It depends — honestly — on how much you generate, when you use electricity and what tariff you're on. Load shifting and higher self-consumption both help, but the economics differ house to house. We model it against your usage during the design and will tell you plainly if storage doesn't stack up yet.
Keep exploring

Build the rest of the system.

Solar PV

The generation half — panels designed around your roof and usage.

Explore solar PV

Everything for homeowners

Heat pumps, grants and advice for your home in one place.

Explore homeowners

Talk it through

Ask the team whether storage makes sense for your home.

01269 833100

Ready to store your energy?

Get a free, no-obligation quote. We'll look at your usage patterns and your existing or planned solar, and design storage that fits — or tell you honestly if it doesn't yet.

Get a free quote Call 01269 833100