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That massive spike of 50c/kWh at the left looks tiny compared to today even though that's already insanely expensive
this post was submitted on 05 Jan 2024
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Mildly Infuriating
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I’m surprised that those 30% don’t have batteries to shift load times
Those batteries would never pay themselves back.
I'm in the UK on an agile tariff and I'm not quite so sure - it depends on a number of things. Sure my batteries were bought primarily to support my solar panels. but I've been making quite a lot of money this winter.
I haven't run the figures on payback times if the batteries were just for shifting and not solar - but they might just pay themselves back.
The math has been done multiple times. The batteries don't pay themselves back, and also need to be replaced from time to time.
Sure. But the math depends on electricity tariffs. And those change and therefore, so does the maths. it sounds like tariffs are pretty extreme currently
Batteries on a plan like that, where they're part of a large virtual battery, do pay for themselves within warranty
Solar batteries never do. To rationally buy a battery one needs to put high value on backup power
Is that actually a widespread practice anywhere? I'm in Switzerland and I don't think I've seen that anywhere (other than in one farm near me which is entirely covered in solar panels)
In the UK domestic solar panels are quite common and new installations usually come with batteries. Agile 30-minute pricing tariffs are still new and fairly experimental, but people are rapidly realising that their batteries can be really useful when used to force charge/discharge based on grid demand. Octopus is probably the leader: https://octopus.energy/blog/agile-pricing-explained/
I live in the northeast US and we looked into batteries. Unless you’re rolling your own and have a very specific home/garage layout installing them is really difficult. They have to be outside the living space, away from flamingo wall coatings and windows. And they need to be relatively climate controlled (not great in direct sunlight or frigid temps).
Until we start designing battery systems that can mount outside (away from the house, like propane tanks) within their own heat pumps to manage temps built in, it’s not going to be popular in climates like ours (which are very similar to Swiss and lower scandawegian climates).
They should probably be bigger metal boxes with sodium flow batteries and heat pumps, like we have now for utility boxes in some places. They could incorporate the smart/net meters required to pump back into the grid too.