How a Home Battery Runtime Calculator Works
Use a home battery runtime calculator to size backup for heating, broadband, lighting and refrigeration, with allowances for losses and surge loads safely.
home batteries
Can Solar Panels Power Your Home During a Power Cut in the UK?
Standard UK solar PV systems usually switch off during a power cut. Learn how anti-islanding works, what equipment enables solar backup and why sunlight alone cannot guarantee household power.
Essential Appliances During Power Cuts at Home
Plan essential appliances during power cuts by load, likely runtime and safety. Decide what stays on before choosing a generator, battery or hybrid system.
Do Solar Panels Work on Cloudy Days in the UK?
Solar panels can generate electricity on cloudy days in the UK, using diffuse daylight. Learn how cloud, winter daylight, shading, orientation and system size affect output, and how to interpret your monitoring data.
How Long Will a Home Battery Power a House During a Power Cut?
Estimate home battery runtime during a power cut using usable capacity, inverter efficiency, average household load and appliance demand. Includes worked light, moderate and heavy-load examples.
Watts vs Watt-Hours: How to Calculate the Backup Power You Really Need
Watts determine whether backup equipment can run your appliances, while watt-hours determine how long it can do so. Learn how to total running loads, allow for motor surge, account for inverter losses and calculate a realistic backup-power requirement.
UK Home Backup Power: How to Keep Essential Appliances Running During a Power Cut
Learn how to prioritise essential appliances and compare portable power stations, home batteries, generators, solar and EV-based backup for UK power cuts.