Solar panels still generate on overcast days — often at 10–25% of peak output. The trick to a productive summer in a wet climate is making the most of every kilowatt-hour.
Three strategies that actually work
- Shift heavy loads (washing, dishwasher, EV charging) to daylight hours.
- Add battery storage so cloudy-day generation still gets used in the evening.
- Use monitoring to catch shading or fault issues early — a broken bypass diode can lose you 15–20% without any obvious sign.
A note on inverter sizing
A slightly oversized DC array on a well-sized inverter keeps output high on cloudy days. We factor this into every design.