Quick answer
Solar pricing varies with system size, hardware, roof complexity, switchboard work and installer scope. Use quote inclusions—not price alone—to compare offers.
What matters most
- Ask whether the quote includes meter work, switchboard upgrades, monitoring and grid-connection administration.
- Compare inverter and panel model numbers, not just brand names.
- Use the solar savings calculator with the quoted installed cost to test payback.
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