Shift energy in time
Use more stored energy during the evening or another chosen period.
Keep more energy for when life happens · Define the job first
Store energy for when you need it
A battery stores solar or lower-cost grid energy for later. The right size depends on how and when your home uses electricity.
See and manage demand
Monitoring helps the household understand charging, discharge and grid use.
Prepare for change
Plan around future solar, an EV or a heat pump before electricity demand grows.
Battery with new solar
Design generation, inverter and storage together from the outset. The cleanest route when both technologies are part of one project.
Retrofit to existing solar
Add storage after checking the inverter, monitoring and electrical arrangement. Often possible, but compatibility shapes the right approach.
Battery without solar
Charge from the grid during selected tariff periods and use energy later. Value depends heavily on tariff rules and household consumption.
Give the battery a clear job
Size storage around real demand, tariffs and solar generation.
Warmaway starts by agreeing the objective. Solar self-use, tariff shifting and backup resilience require different assumptions and sometimes different equipment.
Battery storage with solar
A battery can hold some daytime solar generation for use later, increasing the proportion of self-generated electricity used in the home.
Standalone battery options
Some households may use a battery without solar to shift grid electricity from lower-cost tariff periods. Suitability depends on consumption, tariff structure and the battery objective.
Plan for changing demand
An EV or heat pump can significantly change electricity use. Warmaway looks at the wider system so the battery is not chosen in isolation.
Solar & battery
Make, store and use more of your own electricity.
Support is not limited to one grant. VAT relief, export payments and local funding can all influence the cost and choice.
0% VAT — Residential installations
Applies to qualifying residential solar-panel and electrical battery-storage installations until 31 March 2027.
SEG — Smart Export Guarantee
Eligible systems can receive payments for surplus electricity exported to the grid. Tariffs and eligibility vary by supplier.
Local support — Warm Homes: Local Grant
May include solar panels for eligible lower-income households in England, subject to the property and available local funding.
A property-led answer
What do you want the battery to achieve?
A larger battery is not automatically a better one. It should be capable of meeting useful household loads without routinely sitting empty or unused.
Often a good fit when...
- Solar generation regularly exceeds daytime use
- Evening electricity demand is significant
- A suitable time-of-use tariff supports planned charging
- Future EV or heat-pump demand has been considered
We still assess...
- Half-hourly or typical daily load profile
- Existing solar generation and inverter compatibility
- Tariff structure and charging permissions
- Safe, accessible equipment location and cable route
From usage data to handover
Decide what to store, when to use it and why.
A battery can do several things, but not every system does all of them.
Understand your usage
We review consumption, tariffs, solar and future plans.
Size the system
Battery capacity and inverter approach are matched to the goal.
Survey the property
Electrical capacity, location and safe access are checked.
Install and configure
The system is tested and monitoring is explained.
Designed before it is sold
The practical checks behind battery sizing
Capacity is only one figure. Power output, inverter limits, usable storage, location and the loads you expect it to serve are equally important.
What we assess
- Daily consumption and peak household load
- Solar surplus by season where available
- Battery usable capacity and discharge power
- Inverter and metering compatibility
- Indoor or outdoor installation conditions
- Backup expectations and essential-load configuration
A complete project
What the project includes
- Usage and objective review
- Battery and inverter recommendation
- Site and electrical-capacity survey
- Safe installation and required protection
- System configuration, testing and monitoring
- Handover covering normal operation and limits
Questions, answered simply
Everything you need to know before booking.
Can I install a battery without solar panels?
Potentially, yes. The value depends on your tariff, load profile and what you want the battery to do.
Can a battery be added to existing solar?
Often, yes. The existing inverter, electrical arrangement and system age need to be checked before the best approach is confirmed.
Will a battery keep the whole house running in a power cut?
Not automatically. Backup needs compatible equipment and a defined set of supported loads. Standard grid-connected systems may shut down during an outage for safety, so resilience must be designed explicitly.
How large should my battery be?
Sizing should consider solar surplus, evening use, peak demand, tariff strategy and future loads. A usage-led recommendation is more reliable than choosing by property size alone.
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