Warm Homes Plan: Low Interest Finance for Solar Panel and Battery Storage

Making Solar and Battery Storage More Affordable for Homeowners Across the South East

For many homeowners, the biggest barrier to installing solar panels and battery storage is the upfront cost.

A new low-interest finance option is expected to become available from October 2026, potentially giving eligible able-to-pay homeowners a more affordable way to spread the cost of a solar PV and battery storage system over a number of years.

Subject to final confirmation of the scheme, eligibility criteria and finance arrangements, SolarTherm UK expects to be able to offer finance options designed to make investing in renewable energy more manageable.

New Solar Finance Options Expected from October 2026

Subject to final confirmation, the anticipated finance options include:

4.9% APR – 120 Months

A 10-year finance option designed to spread the cost of your solar panel and battery installation into manageable monthly payments.

6.9% APR – 180–240 Months

Longer finance terms of 15 to 20 years may also be available, allowing eligible homeowners to spread the cost over a longer period.

The right finance option will depend on your individual circumstances, the system you choose and the final scheme terms.

Why Combine Solar Panels with Battery Storage?

Solar panels generate electricity during daylight hours, but your household’s electricity demand doesn’t necessarily follow the same pattern.

You may generate the most solar energy while you’re out at work or during the middle of the day, while much of your electricity consumption happens in the evening, when your solar panels are no longer producing electricity.

This is where battery storage can make a significant difference.

A solar battery stores surplus electricity generated by your panels so that you can use it later, helping you make better use of the energy your system produces rather than exporting as much of it back to the grid.

Depending on your household’s energy consumption, system size and tariff, adding battery storage can significantly increase the proportion of your solar generation that you use within your home.

Solar and battery storage can help you:

• Reduce your reliance on grid electricity
• Use more of the electricity your solar panels generate
• Reduce your household electricity bills
• Store surplus solar energy for use later in the day
• Increase your energy independence
• Make your home more resilient to changing energy costs

The result is a solar PV system that can work harder for your household throughout the day, rather than only when the sun is shining.

Who Is the Finance Intended For?

The anticipated finance option is aimed at able-to-pay households that want to invest in solar PV and battery storage and spread the cost of their installation.

The Government’s Warm Homes Plan includes measures intended to support improvements to home energy efficiency and renewable energy adoption. The anticipated low-interest finance route could provide another way for homeowners to invest in technologies such as solar panels and battery storage without having to fund the entire installation cost upfront.

Importantly, eligibility, finance rates, available terms and the final structure of the scheme will be subject to the confirmed arrangements.

Could Solar and Battery Finance Pay for Itself?

One of the biggest advantages of financing a solar and battery system is that you’re not simply paying for an improvement to your home – you’re investing in a system designed to reduce the amount of electricity you need to buy from the grid.

Your potential savings will depend on factors including:

• Your current electricity consumption
• The size and orientation of your roof
• The size of your solar PV system
• Battery capacity
• Your electricity tariff
• How much of your solar generation you use
• Export payments available to you

A properly designed system should therefore be based on your household’s actual energy usage, rather than simply installing as many panels as possible.

SolarTherm UK can assess your property and energy requirements to determine what combination of solar panels and battery storage could work best for your home.

How Much Could You Pay Each Month?

With finance options potentially available over 10, 15 or 20 years, spreading the cost could make solar and battery storage accessible to more homeowners.

However, monthly payments will vary depending on the total installation cost, finance term, APR and individual circumstances.

Rather than relying on a generic example, SolarTherm UK can provide a bespoke system design and quotation, allowing you to see the potential cost of your installation and discuss the finance options available to you.

Take the Next Step Towards a More Energy-Efficient Home

If you’ve been considering solar panels but the upfront investment has been holding you back, the anticipated Warm Homes finance options could provide another way to spread the cost of your installation.

SolarTherm UK provides solar PV and battery storage systems across the South East, with every system designed around your property, energy consumption and future requirements.

Your dedicated Solar Project Manager will guide you through the process from your initial enquiry and system design through to installation and, where applicable, the finance process.

There’s no pressure selling and no hard sell – just straightforward, expert advice to help you understand your options and decide whether solar and battery storage is right for your home.

Want to find out what your solar and battery system could look like?

Get in touch with SolarTherm UK today for a free, no-obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice – and the time you need to make an informed decision.

Your home. Your energy. Your future.

**As with all finance applications, approval will depend on individual circumstances, eligibility and lender approval.

Frequently Asked Questions