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Message: <blockquote data-quote="seeyagooch" data-source="post: 6629455" data-attributes="member: 224960">I have a current Enphase system with S280 inverters (they are not IQ compatible), system is 30x320W and broken up into 3 arrays. I wanted to make sure that my existing PV system will be able to charge the Powerwall (being that it is upstream from the Tesla Backup Gateway 2) in addition to the newly installed Tesla PV system. I've gone through the NREL estimates and it seems because of the pitch of my roof and panel orientation, I will need more than the 4.25kW of the new system to fully charge the PW on many days. I have attached the diagrams that Tesla had sent me.Another concern I have is that if the grid goes down, will the gateway be able to control the S280 inverters to keep my house powered (I know it's either on or off and can't curtail based on usage and that if I pass 5kW to the PW or if the PW is at maximum capacity it will shut it off). Thanks in advance!</blockquote>