Planning & ownership
Start with the job you want a battery to do. Using more solar after sunset, managing peak imports and keeping selected appliances running during an outage are different objectives. Make the priorities clear before comparing models.
Separate stored energy from power
Storage in kWh describes an amount of energy. Power in kW describes how quickly energy can be delivered. Ask for both ratings, usable storage and any reserve settings. For a simple illustration, a steady 1kW load uses 1kWh in an hour; a real home has changing loads and system losses, so that example is not a runtime guarantee.
Check the existing installation
For a retrofit, provide the inverter model and details of the current solar system. Discuss the switchboard, equipment location and monitoring. Ask the proposal to identify any additional electrical work and explain how the new storage will operate with the existing equipment.
Be precise about backup
- Which circuits are included?
- What equipment changes are required?
- What loads can run at the same time?
- How are reserve settings managed?
- What happens when stored energy is exhausted?
Questions worth asking
Is a bigger battery always the better choice?
A larger capacity needs enough charging opportunities and useful discharge demand to justify its extra cost. Compare a smaller option against the same household routine.
Can an existing solar home request storage?
Yes. Compatibility and installation requirements are assessed before the model and scope are confirmed.