Numeric digital invertor is not good invertor as per other inverters that are available in the market. numeric digital inverter looks good and unique but in performance its poor and do not stand a chance. Its takes many hours to charge the battery but discharging rate is very fast and within 1.5 hour it gets discharge and the appliances used are only 1 led fan and tv. So performance wise its poor and its cost is high enough and in that range you have many option available in the market. It is user friendly only who knows how to operate.