AC Point of Connection could be to a backfed 20A DP breaker in the existing GE TM3210CCU load center (100A MB with 100A busbar) if the SMA SB3800 inverter was still available. But a SB4000 requires a 25A breaker which violates the 120% rule with the existing panel.
Comments on the options below. #1) Go with another 240v grid tie inverter in the 3800W range, so we can use a 20 Amp breaker. I see PV Powered and Kaco have 3500's listed. Any 3.7, or 3.8kW inverters? #2) Is it possible to either, change out the Main Breaker in the above GE load center to a lower amperage MB, or add a Plug In Breaker. There is a GE "feeder type" breaker # THQL2190 (90 A DP). Could we use this as the main breaker for the load center above? It is listed as a 10KAIC breaker. #3) Swap out existing 32 space load center and replace with 150AML panel with 100A MB kit. Thanks, Dave Palumbo
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