This has been my concern with VPP, no one expects a rolling black out or PSPS, but they just happen and by the time 6-7pm rolls around, my batteries would be drained if I participated. I guess I could just set a high reserve, but then, what's the point? In this heat, I can't really easily get through to 9pm actually with the A/Cs cranked up. I guess I would miss power if batteries were drained more than the $$ from VPP.