400 Watt Solar Panel Price – 400-watt solar panel productivity can be determined by the value of MPP solar panels and in India, it depends on 21.2%. Solar panels are a high-level strategy to keep the world truly isolated and safe. It has great module effectiveness of up to 18% and solar cell efficiency of up to 21.2%. This panel is designed with new age PERC cell innovation which is better than other cell innovations and also has higher effectiveness than standard PV modules. Mono PERC cells perform well in low light and shady conditions.