Comment by itsrobreally
2 hours ago
Can confirm, setup a couple hundred watts as a hobby project during the pandemic and built a battery pack - the biggest challenge (other than matching connectors) is finding anything other than just "charging devices" that the thing is practical for - until you get up around 1000W a lot of "normal" stuff is just too hungry.
This just plugs into an outlet and offsets whatever usage you have, though. No need for a battery or matching load. It just subtracts 180 watts from your household usage.
These types of devices are fairly popular in Germany, and maybe other places. For someone like me, with very high peak daytime prices, even a small offset would be valuable, but the full price here seems to be $500, which is too much. No reason it couldn't be much cheaper, though.
Call it 200W, and it would offset say 5 hours a day of that for where I'm at.
Call it 1.5kwh for the entire day being optimistic. This would save me (inclusive of taxes, etc.) roughly $.33/day. Call it $10/mo.
34mo so payback isn't the worst I suppose. Better than I expected to be honest. Probably not worth the hassle factor though since I don't have an ideal place to put such a thing.
I do have an "always on" load of well over 200W in my home, so at least it would offset every watt it generated. I'm not sure how true that is for most folks, as most folks don't run a home lab in their basement.