[待更新] 20 YEAR WARRANTY. Designed for the UK & Europe. Installed in more than 65 countries. London based. Save money on hot water, swimming pools, washing and bathing needs. Renewable Heat Incentive (RHI) approved solar panels. Solar power is a renewable energy and with GENERSYS solar panels youc an expect to save more than a tonne of CO2 emissions per year and hundreds of pounds from your energy bill.rk? Although they work best in direct sunlight, very good performance will be given in the indirect...