Hi: Need help with whether to purchase power wall with solar panels. I live in northern jersey and own my home that has backyard with southern exposure. There is no shade from nearby trees. I usually run an electricity bill from 200-300 dollars per month. We have AC, pool, one electric car to charge with four person household. I have talked to Tesla rep about solar panels and want to proceed with installation. My question is if it's worth it to get the power wall installed at the same time. Tesla rep told me that there would 30% tax rebate on the battery. What benefit is there for having a powerwall versus just having the solar panels? Also how many power walls would people recommend? Are most customers getting powerwall 2 or is there still a waiting list? Also can the power wall be kept outside year round? Thanks for help.