Load kitna hai ghar ka..uspr depend hai jada load hoga to battery discharge ho rahi hai par 900watt load pr bhi 2hr chalna chahiye....or load jada nahi hai..to inverter or battery dono check krna hoga..
Shop wala bola ki.... sine wave me input voltage jyda chaiye.... kam voltage me kam nhi krta hai.... kiya ye shi hai hai. (mere yaha saam me 100 to 140 voltage rehta hai)