Hi @jjclara
They are indeed very different.
You are using approx 35kWh per day on average. Quote one is about 15kW and quote 2 is 10kW of solar. Assuming you’re in a reasonably sunny part of North America, that will equate to about 60kWh a day for quote 1, and 40kWh a day for quote 2. Both above your needs, quote 1 significantly so.
In most parts of the US I believe you are able to get a “net feed in tariff”, which means you receive the same amount of money for the solar you export, as for the solar you import. In which case I don’t really see the benefit of getting a battery. Do you know if you are able to get a net feed in tariff, or what the deal is in your state?
I would be inclined to get a 10kW system without a battery. In fact, if you can fit 28 panels on your south roof, I think that would suffice. 28 x QCells 315W with Enphase inverters would be my choice.
Hope that helps.
Marty