Hi folks, I am confused by what I'm being told by a couple different salesmen, and I'm hoping someone can help me gain clarity. I'm looking to install Powerwalls as a partial home backup system. That is my main goal, not to capture more solar energy, although I will gladly take that. I have a 11.5kW solar array that I've had for 10 years, and I live in western NY. My main concern is that I have a large, 6 ton geothermal heat pump (Climatemaster Tranquility 27 model 072) that obviously draws quite a bit of power. I would like to provide backup for that plus a deep well water pump plus a couple light circuits. I do not expect backup for the resistance heater on the heat pump. I am only looking for backup for 12-24 hours. I have been told that 2 Powerwalls will be adequate by one salesperson and that I need multiple Powerwalls by another. Do you think that two can meet my objectives? I am virtually clueless when it comes to electrical stuff, so please keep any suggestions simple! Thanks loads!