Hope you are fine. EPSOLAR, the manufacture of solar charge controller, inverters.For products: We have full ranges of PWM, MPPT charge controllers and pure sine wave inverters. PWM 5A-60A 12/24V, 12/24/36/48V with or without LCD display MPPT 10A-60A,12/24V, 12/24/36/48V, PV max input 3300W. with or without LCD display Inverter: 200W-3000W For quality :We assure good qualityWe can control quality almost in production line. We have full ranges equipment, CNC, washing machine, SMT, automatic glue filling machine .Most electronics are imported from overseas, like Rubycon, IR For after sale service: We have 2 years warranty , and in case quality problem, we can contact with you for problem or replacement Attached you can find the catalogue of our products, please select some models you are intrested in, I will give you price offer accordingly Any more info, please let me know Best regard