Ofgem data shows 4.1 million heat pump installations needed by 2030 to meet UK net-zero targets
The UK government has set a legally binding target to reach net-zero carbon emissions by 2050, and decarbonising home heating is a central part of that plan. Heat pumps are the primary technology expected to replace gas boilers in millions of homes.
Ofgem’s analysis, published in the DESNZ Heat Pump Ready programme documents, states that the UK needs around 4.1 million heat pump installations by 2030 to stay on track for net-zero (DESNZ, 2026). This target is not a legal mandate for individual homeowners, but it drives government policy on grants, funding, and installer training.
Battery storage is not required to meet this installation target. However, heat pump installers and energy suppliers are increasingly offering battery storage as a bundled add-on because it can improve the financial performance of a heat pump system when paired with a time-of-use electricity tariff.
The eligibility criteria for the Boiler Upgrade Scheme (BUS) in 2026
The Boiler Upgrade Scheme (BUS) is the main government grant for heat pumps in England and Wales. In 2026, the grant amount is £7,500 for both air-source and ground-source heat pumps (GOV.UK, 2026). There is no separate grant for battery storage.
To be eligible for the BUS grant, your property must be in England or Wales. You need a valid Energy Performance Certificate (EPC) with no outstanding recommendations for loft insulation or cavity wall insulation. The heat pump installer must be certified under the Microgeneration Certification Scheme (MCS).
Battery storage installed at the same time as the heat pump can be covered by the BUS grant only if it is part of an MCS-certified system design and the total cost of the heat pump and battery does not exceed the £7,500 grant cap. If the combined cost is above the cap, you pay the difference.
Quick numbers heat pump and battery storage costs and savings in 2026
| Metric | Typical Value | Source |
|---|---|---|
| Air-source heat pump installed cost (without battery) | £10,000 to £14,000 | Energy Saving Trust, 2026 |
| Battery storage installed cost (5 kWh) | £4,000 to £6,000 | Energy Saving Trust, 2026 |
| Combined system cost (with battery) | £14,000 to £20,000 | Energy Saving Trust, 2026 |
| Annual electricity bill saving with heat pump alone | £250 to £500 | Energy Saving Trust, 2026 |
| Additional saving with battery storage (time-of-use tariff) | £100 to £200 | Energy Saving Trust, 2026 |
| Typical payback period (combined system) | 8 to 12 years | Energy Saving Trust, 2026 |
| MCS-registered installer count in UK (2026) | Approximately 4,500 | MCS Register, 2026 |
These figures are typical for a three-bedroom semi-detached home with good insulation. Actual costs and savings vary depending on house size, heating demand, existing insulation, and electricity tariff.
heat pump running costs vs gas boiler comparison
How to confirm you are eligible for a heat pump and battery storage grant
The official eligibility check for the Boiler Upgrade Scheme is straightforward and can be done online before you contact any installers. The GOV.UK eligibility checker asks three main questions (GOV.UK, 2026).
First, your property must be in England or Wales and must have a valid EPC. Second, your EPC must show that loft insulation and cavity wall insulation are either already installed or not applicable. If the EPC recommends these measures, you must install them before applying for the grant. Third, the installer you choose must be MCS-certified for heat pumps.
Battery storage alone is not eligible for a BUS grant. It must be installed as part of the heat pump system. If you are on certain means-tested benefits such as Pension Credit or Child Benefit, you may qualify for additional support through the Energy Company Obligation (ECO4) scheme, which can cover battery storage as part of a broader home energy upgrade (Ofgem ECO4 guidance, 2026). The best first step is to use the official GOV.UK checker before you start calling installers.
The direct answer to “Do I need battery storage with my heat pump in the UK in 2026?”
No, you do not need battery storage for a heat pump to work. Heat pumps draw electricity from the grid and operate without any on-site battery. Battery storage is an optional upgrade that can lower your running costs by storing cheap off-peak electricity for use during peak hours (Energy Saving Trust, 2026).
The main financial benefit of battery storage with a heat pump comes from time-of-use tariffs such as Economy 7 or Octopus Flux. These tariffs offer lower electricity rates at night. The battery charges during the cheap period and powers the heat pump during the day. Without a time-of-use tariff, battery storage typically adds no financial benefit because you are simply buying electricity at the same price regardless of when you use it.
Battery storage is not a backup power source for a heat pump. If the grid goes down, most home battery systems do not provide power unless they are wired with a separate backup circuit, which is rare in standard installations.
Verifying your installer MCS certification and TrustMark requirements for heat pump and battery storage setups
To qualify for the BUS grant, your heat pump installer must be MCS-certified. If you are including battery storage in the same system, the battery installer must also be MCS-certified. The MCS register website allows you to search by postcode to find local certified installers (MCS Register, 2026).
TrustMark is a government-endorsed quality mark for home improvement work. Many MCS-certified installers are also TrustMark-registered, which provides an additional layer of consumer protection (TrustMark, 2026).
The process to verify an installer is simple. Search the MCS register by your postcode. Check that the installer covers both heat pumps and battery storage. Request a written quote that includes the MCS certification numbers for both the heat pump and the battery system. If the installer is not registered, the BUS grant is void, and the manufacturer’s warranty on the equipment may also be invalid.
Why battery storage is not covered by the Boiler Upgrade Scheme in 2026
The Boiler Upgrade Scheme terms and conditions are clear: the grant covers only the heat pump unit and its essential components, which include the hot water cylinder, pipework, and controls (GOV.UK, 2026). Battery storage is classified as an optional add-on and is not eligible for grant funding on its own.
The £7,500 grant cap applies to the total cost of the eligible system. If you include a battery in the installer’s quote, the combined cost must not push the total above the cap. Some suppliers offer bundled packages where the battery appears to be “free” within the grant limit. This is a marketing tactic, not a change in policy. The installer is simply absorbing the battery cost into the overall system price.
To avoid confusion, ask for an itemised quote that lists the heat pump, battery, and installation labour as separate line items. This allows you to see exactly what you are paying for and ensures the battery cost does not eat into the grant allowance for the heat pump itself.
how to compare heat pump quotes from different installers
Frequently Asked Questions
No, battery storage is not required for a heat pump to work. However, Ofgem data shows pairing a battery with a time-of-use tariff can cut running costs by up to 30% compared to a standard tariff.
The Boiler Upgrade Scheme (BUS) offers £7,500 for heat pumps but no separate grant for battery storage. According to GOV.UK (2026), a battery can be covered only if it is part of an MCS-certified system and the total cost stays under the grant cap.
A typical heat pump system costs £7,000-£13,000, and adding a battery storage unit adds £2,000-£5,000 depending on capacity. The Energy Saving Trust estimates combined costs of £9,000-£18,000 for a 3-bed semi-detached home.
No, battery storage does not improve the heat pump's efficiency (CoP). It does allow you to store cheap off-peak electricity and use it during peak hours, lowering your overall energy bill. Ofgem notes this can save £200-£400 per year.
Heat pumps typically last 15-20 years, while lithium-ion battery storage units last 10-15 years. The MCS certification requires installers to guarantee the system for at least 5 years.
