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Powerwall 2 kwh draw when idle

ABMT

New Member
Apr 11, 2018
2
0
Montana
Does anyone know what the Powerwall 2.0 system energy draw is? I've ordered two Powerwalls for my off-grid cabin and I'm a little concerned about the drain all winter when there isn't much sun (I have a 5kW panel).

The only load all winter is the modem so I can check on the system.

My current Outback inverter draws about 3kWh a day.

Thanks in advance.
 
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arnolddeleon

Member
Supporting Member
Jul 21, 2012
929
1,006
SF Bay Area
Does anyone know what the Powerwall 2.0 system energy draw is? I've ordered two Powerwalls for my off-grid cabin and I'm a little concerned about the drain all winter when there isn't much sun (I have a 5kW panel).

The only load all winter is the modem so I can check on the system.

My current Outback inverter draws about 3kWh a day.

Thanks in advance.

I have 2 Powerwalls, 3 Outback inverters and a Xantrex as part of our grid-tied system. A problem that has not been solved is the Powerwalls are discharging in apparent response to the Outback inverters "charging" or floating my really decrepit batteries that are connected to them. The "standby" loses are smaller but I haven't been able to see it yet because of this problem. Others have posted about that but I don't have the numbers at my finger tips.
 

strangely

Member
Mar 29, 2017
121
74
SoCal
I just installed a power monitoring channel on mine (from my Brultech Gem) and it appears to be be drawing about 4 to 5W in idle, however I don't know if that includes the Gateway... My guess is not, so I might have to see at some point with flipping all my breakers off to measure that.
 
Telsa say around 1kWh per day - that (I believe) is for the gateway controller, rather than the batteries). You'd only have one gateway, so I'd be thinking around 1kWh per day - a 40W load for the gateway controller seems about right.

I haven't measured it, though - the design of the gateway makes it difficult to measure it's consumption, and the gateway doesn't report on self consumption for the gateway.

The batteries flip between 0 and 10 watts when idle, so @strangely's 4-5W matches what the gateway itself reports.
 
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