Power Output (Wh) = Panel Wattage × Peak Sun Hours For instance, with 4 peak sun hours per day: 200W × 4 hours = 800Wh/day Moreover, efficiency plays a vital role in how much and how well the panel converts sunlight into electricity. Modern 200W panels have an efficiency rating.
The list below shows the 10 best solar panels according to our solar experts: Our rankings look at solar panel specifications, performance under third-party testing from Kiwa PVEL, warranty coverage, company financials, and industry opinion.