... WattAC output voltage range90~130V; 190~260VAC output frequency46~65HzTHD<5%Power factor0.99DC input voltage range22~60V DCPeak inverter efficiency92 ... , overload, over temperature, low battery,.) and so on.WarrantyWe provide 1 year warranty.PaymentWe accept payment via TT (Bank transfer), Western ... Sea or by Air. 4000W 4KW PV Grid Tie Solar System, AC220V Solar Energy System for Home Use