i am planning to install a on grid system with a capacity of 2kw for my home with monthly consumption of 350 watts average. how many panels i need, what are the items needed with capacity spec. what would be approx cost ? what is the warranty period for the panels and other parts? Any AMC is there ?

ganesan

I bought a simple solar set from Amazon about three years ago : two 15W panels, a solar fan, a light and a box. the box has two 12V batteries (Exide). As the batteries did not hold long anymore I replaced them about 2 months ago. For about a month that worked great : the fan and a light both worked during the day and the whole evening. But lately the fan stops already around 5pm. What can be the reason?