I have two quotes that are both from reputable companies but they are very different and I can’t make out which one is closer to being correct.
There will be two arrays in the final analysis - one on a southern facing roof and one on a western facing roof that is also slightly north. The money was pretty equal so I am not worried about that. Can you tell me what you think about each proposal?
The annual usage is 13,003 kWh.
Proposal #1: 45 Q-Cell 315’s with 45 Enphase micro inverters. 100% grid tied with no back up. 28 panels on the southern roof and 17 on the western roof. (maybe 26 and 19 depending on fit)
Proposal #2: 34 Mission 305’s with a StoreEdge SE76 and P320-5 Optimizers AND an LG RESU10H battery (this system is actually a little cheaper despite having the battery).
My concern is that I really want to cover my usage with a little buffer and I can’t understand how these two quotes could be 11 panels apart - with the larger panels being the most numerous. Any thoughts or comments would be appreciated!! Thank you!