The luminous ecovolt 850 pure sine wave inverter is a very good product and the trust of luminous . The luminous provides the quality products. The inverter is very good. Charges really in a short time and gives a backup for a long time its pure sine wave technology is the best with this there is no fluctuations in the current and runs smoothly no issues after use of 2 years and running smoothly .its durabe very good product recommend this to everyone . It in also charges in low voltage