the windturbine is still generating significant power (bursts of 1kw+) despite the weather, nice to still have some off grid power despite the solar panels being blocked by the snow
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@anthropy Nice. I was wondering if it’s worth getting one or two. What power of a turbine is it? Is it noisy (specially worried to annoy neighbours).
@muppeth It's a 5kw turbine but it never really gets that because it'd have to keep a consistent speed, but it's set up between buildings so the wind is a bit turbulent, it'd work better if I'd put it on my roof or something alike I think.
In terms of noise, well you can hear it in the video, it's audible but it's a kind of 'wind whistling' noise that people don't associate with turbines; no low hum or anything like that. That said, I can occasionally hear it behind the door when storming.
@muppeth I should also note that I don't have a good graph or anything for the power usage, it's more based on watching the controller's display when it peaks, and calculating how much power I should have in my battery and actually end up having in it, since the various inverters/controllers/etc are all attached to the same pack with their DC side.
I've been meaning to set up proper separated controlled inputs to/from the battery pack but I've been sick for a while and been able to do it so far
@anthropy Currently dont have battery but was actually thinking that probably the system (specially in winter) would be more efficient if it’s directly connected to water heating element. then there is no need for inverter and all power (as soon as any is generated by turbine) would be pushed to the water tank in form of heat.
@muppeth also fair, and nice and hackery simple, but it depends on your goals I suppose!
I've been intending to create a custom heat pump system with double/triple buffer (cold/comfort/hot) that's connected directly to my battery, it would be more efficient and flexible than a resistive heater, but that of course creates a LOT more complexity.
It also deserves to note that if you end up having too much energy it's a little harder to control. A wind turbine needs a big resistor for those times.
@anthropy Wonder if heating element capable of accepting 7kW would be enough. Surely I wouldn’t just connect the two together and call it a day. Would for sure add some break system just in case but I think regulator between heating element and turbine would be sufficient.
Some years ago I saw similar system but with solar panels. Very simple but of course easier as you dont have to deal with over production since you can just switch the panels off.
As for the heating pomp system. I hope I will have some time this year to start experimenting with sand battery. I am luck to have more space outiside the house, so wanted to make a 2m3 sand battery storage under the ground connected to an array of sun collectors and turbines. Thats at least the goal, but at first just wanted to make some POC to see how much energy I could store in a smaller sand battery using one turbine and one sun collector.
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