A typical 5 kilowatt hour (kWh) solar battery, suitable for a three-bedroom house, costs £5,000, on average. The amount you pay will depend on the amount of electricity the battery can store, also known as its capacity. Prices start at around £2,500 for the smallest storage systems, those under 4kWh.
A 5kW solar battery storage system typically costs around £9,000 to £10,000. The variability in installation expenses for such a system is influenced by factors like the battery’s size and whether it is direct current (DC) or alternating current (AC) coupled. How much does it cost to add a battery to a solar system?
When factoring in solar panel costs in the UK, the average 4kW solar system with battery price, for a 3-bedroom house, could reach £13,000 to £15,500. On the other hand, pairing a 5kW solar system with a battery can cost around £16,500 - £18,500. As you can see, the prices increase the larger your solar system size is.
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.
The battery's life cycle and discharge rate can actually make or break the cost of your solar system. Here's the scoop: A long-life battery might pinch a bit more at first - but in the long haul, it can be better bang for your buck. The overall cost changes once you get a reliable battery in there. Sources:
There are four main types of solar battery storage systems available in the market to choose from according to space, usage, output, and cost. These are as follows: RV/Marine Solar batteries. Flooded type batteries. Gel batteries. Absorbed Glass matte (AGM) batteries.