Ok this is an argument I am having with my neighbor who just got his solar roof installed:
9.6KW solar roof, 2 power walls.
House is all electric (Heat pumps with resistive heat of up to 20Kw when deep cold)
Net metering but electrical rate is same all the time so no games to play with peak vs off peak.
So his theory is to keep charging the 2 power walls with excess solar production and discharge them at night!
Power outages are not his concerns and 2 power walls would probably only power a few hours of A/C or heating.
Seems to me:
-The power walls will not last that long (due to number of cycles) or are they warrantied for as long as the solar roof?
-Isn't that inherently inefficient? charging/discharging power walls is probably only 80 percent efficient hence that is costing him money!
-If I am right how could this be explained clearly to him?
Again he claims to have learned that practice from the Tesla installers. Note that I have solar panels next door but no power walls (we have so few outages).
9.6KW solar roof, 2 power walls.
House is all electric (Heat pumps with resistive heat of up to 20Kw when deep cold)
Net metering but electrical rate is same all the time so no games to play with peak vs off peak.
So his theory is to keep charging the 2 power walls with excess solar production and discharge them at night!
Power outages are not his concerns and 2 power walls would probably only power a few hours of A/C or heating.
Seems to me:
-The power walls will not last that long (due to number of cycles) or are they warrantied for as long as the solar roof?
-Isn't that inherently inefficient? charging/discharging power walls is probably only 80 percent efficient hence that is costing him money!
-If I am right how could this be explained clearly to him?
Again he claims to have learned that practice from the Tesla installers. Note that I have solar panels next door but no power walls (we have so few outages).