A battery storage installer is an MCS certified, Part P registered electrician who installs lithium-ion battery systems for homes and commercial buildings. Home batteries store surplus solar generation or cheap off-peak electricity for use during peak demand periods, reducing grid electricity imports. Installers configure the battery management system, inverter and smart tariff settings to maximise savings. Popular battery brands include Tesla Powerwall, GivEnergy, SolarEdge and Growatt, each requiring manufacturer product training.
What they do
- Battery system sizing and specification
- AC-coupled or DC-coupled installation
- Inverter and battery management system setup
- Smart tariff optimisation configuration (Octopus Agile etc.)
- Solar PV integration and export limiter setup
- EV charger coordination and scheduling
- Monitoring app and remote access configuration
- Warranty registration and annual health checks
When you need one
A battery storage installer is needed when you want to store solar energy for evening use, optimise time-of-use electricity tariffs, or add resilience to your power supply.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Battery storage 9.5kWh (supply and install) | £2,500 - £4,500 |
| Battery storage 15kWh (supply and install) | £4,000 - £7,000 |
| Battery and solar PV package | £8,000 - £14,000 |
| Battery management system upgrade | £300 - £600 |
| Annual health check | £80 - £150 |
Costs vary by battery brand, capacity and whether solar PV is installed at the same time. Always obtain at least two MCS certified quotes.
Qualifications to look for
MCS certification is required for battery storage installers working on grant-funded schemes. Verify at mcscertified.com before appointing.
Battery storage is a notifiable electrical installation. The installer must be registered with a competent person scheme to self-certify the electrical work under Part P Building Regulations.
Leading battery brands including Tesla Powerwall, GivEnergy and Growatt require installers to hold manufacturer product training before they are permitted to install and warranty-register those products.
How to find a reputable battery storage installer
Frequently asked questions
How much can a home battery save?
Savings depend on electricity tariff and solar generation. On a time-of-use tariff charging cheaply overnight and discharging in peak hours, a 10kWh battery can save £200-500/year. Combined with solar, savings can be £400-800/year.
How long does a home battery last?
Most home batteries have a 10-year warranty at 70-80% of original capacity. Typical lifespan is 15-20 years.
What size battery do I need?
A 10kWh battery covers most of a typical household's evening electricity use. For solar maximisation, match battery capacity to your typical daily solar generation minus daytime consumption.