Comment by Aboutplants
2 days ago
I’d love a shed sized battery sitting on the corner of my property if it could give me 5-7 days of power.
2 days ago
I’d love a shed sized battery sitting on the corner of my property if it could give me 5-7 days of power.
I'm writing this from my off grid shack.
I have 15kwh of lifepo, and even if it weren't hooked to 4kw of solar I could still run my fridge, charge my phone, and run the fan in my fireplace for 4-6 days... longer if I dump the fridge.
It's 6U of deep 19" rack space.
So 2 x that isn't an entire shed-sized battery.
Though I'd happily have a shed-sized battery... I suspect that delivering and covering something that size would cost more than the batteries I already have, though.
> It's 6U of deep 19" rack space.
If the GP commenter is typing in from the UK .. that's a not uncommon garden tool shed size.
By contrast modern Australian farm sheds have clouds forming within them and host birds that seasonally migrate from one side to the other.
You’ll be fine as long as you don’t go near the corners. The spiders are… vicious…
They make hyper-insulated refrigerators for use on ships with limited electricity that use either vacuum insulated panels or aerogel insulation.
Fortunately for me, I could just bop down to the bog box store and buy a more appropriate fridge from vevor; horses for courses.
I've never had to turn off my fridge, though it does have interesting-to-me usage patterns; it's weird what you can learn once everything you use has a watt-meter. I can look at the weekly graph and recall when I turned on a hammond organ or cooked in my instapot.
Check out https://github.com/dalathegreat/Battery-Emulator
Re use old ev batteries unmodified for battery storage
For something like a battery backup that last decades that doesn't need maintenance, maybe you could bury it out of the way (like under a deck or lawn?), maybe even under the frost line.
Underground is a big problem with it comes to water permeation and flooding.
The other potential problem with a lot of energy systems that use things that have hydrogen in them is running power over the systems for long periods of time can start to leak hydrogen. You'll always want to ensure you have ventilation to ensure whatever is outgassing can escape the system. You'll end up with explosions, hydrogen embrittlement, or interesting corrosion in ways you didn't think were possible.
might need to be in some special containment at that size, depending on the technology -- some sodium ion battery implementations are very toxic / highly reactive / flammable.
That would you pay for that shed size battery?
Depending on just how much more cost effective sodium battery tech gets, that might not be a questionable proposition
You can get a 16kWh LFP battery for $2-3k USD.
I mean, I pay around $2,000 (AUD) per annum for electricity from the grid.
If this battery plus some solar panels could get us free power for the next 20+ years, that's easily worth $15-$20k or so.
I am about 2 years in to my off-grid solar setup. The cost for the easement was looking to be about $25k, plus about 30k for the wire, transformer, et.
I live in middle of nowhere so I just built out a system myself. I am about 8k into it. It's not the biggest system (6kw inverter, 4kw panels, 15kwh storage) but it's fine for one old man living a 2kM in the high desert.
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It's called diesel fuel.