Solar Calculators

Solar quotes tend to be optimistic in the same two places: system losses and future electricity prices. These tools are built to be honest about both. The solar panel calculator sizes an array from your kWh usage or bill with realistic derating for inverter losses, temperature, soiling and shading, then checks the result against your available roof area.

The payback calculator goes past cost divided by annual savings — it factors in electricity rate rises and panel degradation over the years to find the actual break-even point. The system calculator sizes battery bank and inverter from the loads you want to run through an outage.