Hey, I'm back for more collective wisdom. It's looking like our solar install will start shortly. Using REC panels, which should, in theory, provide ~60-65% of our yearly power needs. My next question would be batteries. It's my understanding that I can get a 30% fed tax credit on them, but only if they are included in the cost of the original installation. My local power supplier does offer net metering and I also have a 12KW back up Generac. So, do I really need them?? And if so, how much storage? Recommended batteries?