Quick answer
A 10 kW rooftop solar system can suit larger homes, high daytime loads, EV charging or battery plans. Roof area and connection limits can be decisive.
What matters most
- Use panel wattage to estimate module count and roof surface area.
- Check whether the property is single-phase or three-phase and what the network permits.
- Compare expected exports with the feed-in tariff rather than valuing every kWh at the retail rate.
Solar decision framework
Separate production from value. System size and location drive generation; your daytime load drives self-consumption; tariff structure determines what each kilowatt-hour is worth.
How to calculate it with SunnyWatly
Use the relevant calculator with your own bill, quote or vehicle information. Defaults are examples only and can become stale as tariffs, rebates and hardware change.
Do not rely on a headline figure alone. Ask what assumptions sit behind the estimate and whether they match your property, tariff and usage pattern.
What can change the result
- Electricity usage and time of day.
- Retail import and feed-in tariffs.
- Roof, shading, inverter or charger constraints.
- Hardware efficiency and usable capacity.
- Network limits and future tariff changes.
Primary public sources used by SunnyWatly