Hey all,
I have been working on a design of a mini-AC grid that is a hybrid PV-diesel-battery system.
Since majority of the load is used during daylight hours, I was thinking of using large grid tied inverters to directly power the loads and reduce the size of the batteries which are very expensive and have a lesser lifetime. The batteries will store only the excess power and discharge during the night(when the loads are much lesser). I am thinking this would be a way to minimize the use of diesel generators and at the same time make use of the cheaper grid-tie inverters. Diesel Generators will only function as a back-up (for cloudy days).
I would love to hear some of your comments and feedback on the design and what are the issues that I might have to contend with here. I have attached a block diagram here as well.
Regards,