Explore an illustrative annual energy balance for your roof, electricity use and storage. A site survey and interval modelling are needed for a system design.
The annual model uses 400 W panels and caps the estimate at 40 panels (16 kWp). It estimates how generation and demand balance over a year. It does not match them hour by hour.
Illustrative panel count — not a roof layout
Battery at annual-average demand
The hours shown divide usable energy from a full battery by your annual-average electricity demand. This excludes inverter standby draw, power limits and actual winter loads. The December example assumes 3% of annual PV output spread over 31 days. For an outage estimate, use the Battery & Backup Planner with the loads you need to run.