Powerwalls (x2) installed two weeks ago, and am experiencing my first Storm Watch today due to the expected winds in NorCal. Once the watch was triggered, my Powerwalls immediately began charging from solar and the grid, and stopped charging at 99%. About an hour and a half later, they're down to 97%, but the house has been solely running off the grid and solar (no energy provided by the PW's since they topped off at 99%). Hoping the veterans here can help a newbie - any idea why my PW's stopped charging at 99%, and why they dropped to 97%, especially since we're not pulling power from them? Also, our solar production is now being sent to the house and to the grid, not topping off the PW's that are sitting at 97%.