On average a new solar battery will cost between £3,000 and £9,000 depending on the size, type and brand of the battery. How Much Do Solar Batteries Cost? The cost of a solar battery system is dependent on many factors, including the brand of the battery, the batteries chemical composition, storage capacity and it’s life cycle.
A lithium-ion battery can cost £3,500 to £6,000 depending on its usable capacity (kWh). On the other hand, lead-acid batteries can only discharge 50% of the total amount of storage which means that they are available at comparatively cheaper prices. A lead-acid battery can cost around £2,000 to £4,500 depending on its usable capacity (kWh).
There are two main solar batteries that are used in residential properties, which are: Lithium-ion solar batteries: These are the most popular solar batteries to be used in residential properties as they are compact and have a high power rating. However they can be expensive and have a tendency to overheat.
Higher discharge rates and longer lifespans will typically result in a higher solar battery cost in the UK. Generally, lead-acid batteries are comparatively cheaper in the short term, but lithium-ion batteries are a better fit if you consider future replacement fees.
Currently, the UK is applying a 0% VAT policy for solar panels and batteries, running till 2027. Under the policy, you can get a discount all throughout the UK, including retrofitted solar batteries. This will allow, for example, £2,850 off of solar panel installation and £700 to £1,000 off the average solar battery.
A 4kW system with a battery will cost between £13,000 to £18,500, saving £660 in energy annually. Lithium-ion batteries cost more than lead-acid batteries but also have longer lifespans. Did you know how you can benefit from pairing solar batteries with solar arrays?