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My Powerwall 3 Consumes 3-4 kWh/Day in Self-Consumption: Is This Normal?

 
Energy Storage
Last Post by Caron 1 hour ago
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 Caron
(@caron)
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Topic starter 21/12/2025 11:44 am  

I had solar panels & Powerwall 3 installed in August 2025 & have been shocked to discover that the battery is self-consuming between 3 & 4 kWh of energy per day. I understand that some of this is ‘round trip’ losses due to conversion losses but I was completely unaware that batteries also have standby / parasitic losses which, in my case amounts to about 2kWh per day.

I have also discovered that the Tesla App adds these battery losses to home use instead of battery so, unless you have separate monitoring, you would be either be completely unaware of the losses or spend an eternity trying to work out why your heat pump is using more energy than previously.

Has anyone else noticed similar losses? If so, were you aware of this ‘running cost’ before you decided to purchase? I was completely unaware (possibly due to stupidity on my part) but feel that it’s an important consideration because it’s a fixed running cost that affects calculations of savings and ROI.


This topic was modified 1 hour ago by Mars

   
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