I have 2 Powerwalls, and have a 9.24 kW PV system. With 2 Powerwalls, max charge rate is 10 kW. In the past, all the excess solar were charging PW all the way up to 100% SoC. Nothing exported to the grid until PW recahed 100% SoC. However, today, when it reaches 90%, it throttles down to...