Battery Storage Costs & Savings
Costs & Savings
Standalone Installation Costs
The below are the pre-survey prices for a typical standalone battery installation.
Please contact us for a quote and we will be able to confirm the final price for your own installation.
Tesla Powerwall 3
13.5kWh (1x Battery): £7,455
27.0kWh (2x Batteries): £11,055
Solax T-BAT H 5.8
5.8kWH (1x Battery): £4,751
11.6kWh (2x Batteries): £6,025
17.4kWh (3x Batteries): £7,299
Fox ESS – With Heating Element
10.36kWh – £5,007
15.54kWh – £5,993
20.72kWh – £7,927
Example Battery Storage Savings
Solar panels cut energy costs, but adding a battery boosts savings by storing excess power. Even without solar, you can save by charging at cheaper night rates and using energy during the day. Each kWh from your battery saves around 30p, reducing costs and increasing efficiency—making battery storage a smart choice.
Assumptions:
Unit Rate: £0.30/kWh
Night Rate: £0.07/kWh
Battery Usable Capacity: 15.66 kWh
Savings Breakdown with Solar:
Typical Charging: 60% from excess solar, 40% from the grid at night
Annual Savings from Using Solar Power: £1,028.86
Calculation: (15.66 kWh * 60% * £0.30/kWh) * 365
Annual Savings from Night Rate Charging: £514.43
Calculation: (15.66 kWh * 40% * (£0.30/kWh – £0.07/kWh)) * 365
Total Annual Savings with Solar: £1,543.29
Savings Breakdown without Solar:
Even if you don’t have solar panels, you can still benefit from a battery storage system by charging your battery at the lower night rate and using the stored energy during the day when rates are higher.
Annual Savings from Night Rate Charging Alone: £1,300.89
Calculation: (15.66 kWh * (£0.30/kWh – £0.07/kWh)) * 365
Total Potential Annual Savings:
With Solar: £1,543.29
Without Solar: £1,300.89
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Our 0% Solar Finance through Ideal4Finance makes it easy to start saving with solar sooner.
Spread the cost with affordable monthly payments and enjoy the same award-winning Impact Services quality – trusted by hundreds of local customers and backed by our 10-year workmanship guarantee.
Online applications with quick decision.
Smart Export Guarantee
The Smart Export Guarantee was launched on 1st January 2020, to replace the Feed-in Tariff.
A 4kW solar panel system could make around £906 per year!
Homeowners with solar panels can start making money again!
Will I Pay VAT?
Battery Storage installations are charged 0% VAT whether installed independently, or alongside a new or existing Solar PV system.
Get A Quote
Contact us for a free, no-obligation quote.
We will survey your home in person and provide a no-obligation report.
Our reports contain a detailed breakdown of your Battery Storage system, down to the last nut and bolt.
