Solar pv and other domestic micro-generation technologies
27 watchers
Jan 2023
3:46pm, 14 Jan 2023
97,963 posts
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Hanneke
I have been looking at 3k to add a turbine to the solar. Apparently, this can be done as a hybrid system using one inverter, one set of storage etc I can see you want something in between, with your property size. A 1 kw will just about be enough for me. |
Jan 2023
4:17pm, 14 Jan 2023
45,255 posts
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HappyG(rrr)
I'm sure you can share the battery and inverter, but there is some specialist circuitry required to convert the fluctuating voltage / power from the turbine vs. the solar. Very different profile of generation. Have you got a good person advising you Hann? Hang on to them! It's hard to get good tradespeople!  G
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Jan 2023
4:22pm, 14 Jan 2023
45,256 posts
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HappyG(rrr)
I wish I was more competent to be able to work this stuff out for myself, it doesn't seem like it should be that complicated. But that could just be my ignorance speaking! (The embarrassing thing is I'm a graduate in electrical engineering - but hopeless from a practical point of view.) G
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Jan 2023
4:38pm, 14 Jan 2023
97,967 posts
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Hanneke
It is not that complicated but I have my friend's partner who runs a local company in off grid systems. Usually large projects but he says he will do mine. He advised me to hold fire for a year or two, as developments are rapd right now.
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Jan 2023
7:39pm, 14 Jan 2023
19,171 posts
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rf_fozzy
It's been a long time since I saw the article, but there was credible (this wasn't one of the cranks or CC deniers), but they showed convincing data that showed that small turbines (under 2-3kW I think) didn't generate enough electricity over their lifetime to offset co2 embedded in construction. But as I say this was some time ago. And I didn't look at the data forensically. jda has looked into this I believe too. To be clear larger wind (4-5kW upwards) is definitely worthwhile. It's just small turbines that are at best borderline. There was some discussion some time ago about small turbines in water pipes, but the data clearly shows that these just don't meet the cost benefit analysis. |
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Jan 2023
8:14pm, 14 Jan 2023
19,172 posts
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rf_fozzy
The single most important thing for micro wind generation is siting and output can vary significantly from site to site very significantly. The higher you can place them, the less the variation. Hence why bigger (5kW+) turbines bring substantial benefits over the smaller ones. |
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Jan 2023
9:25pm, 14 Jan 2023
45,258 posts
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HappyG(rrr)
I think my case would be different - unobstructed, windy, hilly setting; and electricity will be partially replacing oil hot water and central heating (surely worst, highest direct CO2 generating usage) No brainer. You're v lucky Hann. Wish I had a pal to consult! G
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Jan 2023
11:03pm, 14 Jan 2023
97,968 posts
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Hanneke
I am but he does think wind isn't worth it for me... He says storage technology will be making HUGE leaps and covering my whole roof in panels, double what I need, and good storage, winter darkness should not be a problem... |
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Jan 2023
8:12am, 15 Jan 2023
45,260 posts
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HappyG(rrr)
We have winter days that generate nothing Hann. I'm sure the technology is constantly improving but even our nearly 10kWh battery barely lasts a day. And that's without using electricity to heat. G
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Jan 2023
10:51am, 15 Jan 2023
97,981 posts
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Hanneke
Ta Happy! That is the feedback I need! The last 6 weeks we had no sun and very low light levels. I don't think I would survive that without a wind turbine in the mix! We did have a lot of wind... |
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