Watts Worth It guide

Solar, batteries, heat pumps and EVs together

UK guide to solar, batteries, heat pumps and evs together, with current official figures, a worked example, practical checks, rules and installer questions.

Illustration showing home batteries equipment and a UK home

At a glance

Short answer

Solar, batteries, heat pumps and EVs together cannot be judged from one national average; use the figures below as context and rely on a property survey, an itemised quotation and the rules that apply where you live.

What this guide covers

This page brings together solar, batteries, heat pumps and evs together, can a battery charge an electric vehicle, can a battery run a heat pump, batteries combined with a heat pump, solar panels combined with a heat pump, preparing you to compare written proposals without treating general guidance as a site-specific design.

For solar, batteries, heat pumps and evs together, separate energy capacity in kWh from power in kW; The first affects how long stored energy may last; the second affects which appliances can run together.

Current reference figures

  • 5 kWh: For solar, batteries, heat pumps and evs together, energy Saving Trust uses 5 kWh as a typical home-battery example. Official context (accessed 27 September 2026).
  • £4,600: For solar, batteries, heat pumps and evs together, its September 2026 example price for that battery is about £4,600. Official context (accessed 27 September 2026).
  • 10–12 years: For solar, batteries, heat pumps and evs together, the same guidance gives a typical battery lifespan of 10 to 12 years. Official context (accessed 27 September 2026).

For solar, batteries, heat pumps and evs together, these numbers are comparison anchors rather than promised costs, savings or performance; confirm the date, eligibility conditions and property assumptions behind every figure in a quotation.

How to compare proposals

For solar, batteries, heat pumps and evs together, compare usable capacity, expected losses, operating temperature, warranty throughput, compatible inverters and backup behaviour; A large nominal figure alone does not establish value.

For solar, batteries, heat pumps and evs together, model at least a winter and summer day using the household’s interval data where available; Check when the battery charges, what demand it can meet and how much energy is likely to remain unused.

Worked household example

A three-bedroom semi-detached household in Leeds is assessing solar, batteries, heat pumps and evs together, so it records present energy use and asks three suppliers to quote the same scope; one quotation is set aside because access work and commissioning are omitted, a second gives a plausible headline result without its supporting calculation, and the third progresses because its survey, assumptions, exclusions, warranties and responsibilities can be checked line by line.

This solar, batteries, heat pumps and evs together example does not identify a universally best product; it demonstrates why comparable evidence should influence the decision before the equipment choice does.

UK rules and responsibilities

For solar, batteries, heat pumps and evs together, check which planning, network, consumer-protection and funding requirements apply in the relevant UK nation; confirm the council, network operator and scheme administrator before signing, and request written cancellation information for a distance or off-premises contract.

Questions to ask

  • What property evidence supports this recommendation?
  • Which calculations determine the proposed specification?
  • What work and permissions are excluded?
  • Which warranties apply, and who handles claims?
  • What commissioning evidence will I receive?
  • Which current standards govern the work?

Independent sources

Last updated .