What is a solar battery storage capacity?

Storage capacity refers to the total amount of energy your solar battery can store, but you can’t totally discharge the battery without damaging it, so all systems have a depth of discharge (DoD) limit. This typically ranges from 80%-95%, meaning that there is a lower usable capacity than the quoted maximum storage capacity.

How many kWh can a home battery storage system hold?

The typical home battery storage system size is around 4kWh, although capacities up to up to 16kWh are available. There are also other ‘stackable’ or bespoke systems if more capacity is required.

How long do solar panels last?

You can expect an average system to last around 10 – 15 years. This could mean that you’ll have to replace the battery and/or inverter 2-3 times over the lifespan of your solar panels, which usually last around 20-30 years. What battery size is right for me?

Are solar batteries worth it?

Solar batteries store the energy generated by your solar panels during sunlight hours and make them readily available for use during non-production hours. It's a great way to make your solar photovoltaic (PV) system more efficient and cost-effective. This cost guide was written in partnership with our professional estimators here at Checkatrade.

Does a solar storage system increase electricity use on-site?

An appropriately sized storage system will increase the proportion of solar electricity used on-site from around 35% to 75%. Solar panels and batteries both produce direct current (DC) and require a device called an Inverter to change that to alternating current (AC), which is what your house needs.

Does a battery storage system reduce electricity bills?

Assuming a standard 28.1p/kWh electricity tariff, for this situation, the battery storage system would reduce the electricity bills by about £267 a year. This figure is based on simulation results and cannot be used as evidence for the actual economic benefits of a battery storage system.