I have a 100 W rigid solar panel including a charge controller that I currently only use for camping to charge batteries (also useful in an emergency at home). It strikes me as a waste that I could be generating more clean energy with equipment that I already have, but I don’t have anything in mind to use this energy for.
Obviously I could try to tie it into my home to run more of my household on solar, or buy more/bigger batteries to charge, but with 100 W of generation, it’s probably not worth it without a significantly increased investment.
I tried searching around online, and I found plenty of discussion for what to do with a whole house that generates excess capacity (mainly sell to the grid), but nothing really on what to do with small scale DC generation.
Anyone here have thoughts?
I’m no expert, but I’d imagine figuring out a (safe) way to use it with your water heater would be the low-hanging fruit, in terms of least-complexity for the amount of grid consumption you’d potentially save.
That’s an interesting idea. A water heater is a really underutilized battery that most households have. I suppose you could hook it up to a thermostat with a set point a couple degrees higher than the mains (or gas) powered thermostat.
A quick search says in my location with a 100W panel, I’ll generate 400Wh as my daily average (1.44 MJ). With a 150 L tank, that gives you about 2.25 K increase in temp for a day.
That’s not nothing.