Tagged: Home battery storage
June 21, 2013 at 22:09 #3634
Home battery storage is going to be the next big development in domestic solar. Germany last month introduced a subsidy for storage if installed with a home solar array, and now something similar is happening in the US – no sign of anything in the UK though.
I also read yesterday of a solar inverter that is coming soon (later this year) that includes a 2kWh battery – and that alone is claimed to increase domestic consumption by 50%:November 28, 2013 at 22:14 #6336
Another article that caught my eye:November 29, 2013 at 08:30 #6340
I think Ecotricity will be heading down this route at some point. The Eco Labs section of their website refers to a ‘black box’ which is set to ‘transform the way we use electricity’.
Because the nature of their energy production is unpredictable, I suspect they can trigger the storage device to store power when they are over producing and release when they are under producing, thus reducing their need to buy future contracts from others and not being able to sell their surplus at decent rates.
Would be good if that also worked with my solar panels!November 29, 2013 at 10:10 #6341
I have seen proposals that the energy stored in an electric car could be used to power the home in the event of a power-cut. As we are frequently reminded, there is a strong likelihood of power-cuts in the not-too-distant future, as demand outstrips supply.
This would require a sizable inverter and a means of accessing the car’s battery output, so would not be simple or cheap.
February 3, 2014 at 23:29 #7348
- This reply was modified 4 years, 9 months ago by andyfras.
I am actively looking to buy a home energy storage system (ESS) or possibly make my own (like Christophe Hubert’s DIY ESS).
I recently tracked the sale of a wrecked Nissan LEAF with a friend at work who also has solar PV. Its battery pack would be large enough to make anything up to half a dozen ES systems. Bidding started at £1k, but we decided to proceed no further once it passed £4k.
Another one has appeared, so I’ll be watching this one in the same way:February 6, 2014 at 23:47 #7429
I’ve been looking at home ESS that have begun appearing on the market. The problem is that they are all still pretty expensive, so the pay-back on investment is long. I guess that prices will fall in time, but with the approach of sunnier months I can’t help wondering if it’s not about time to take the plunge…February 8, 2014 at 10:34 #7447
We bid on the second Leaf on Wednesday until it hit £4500, so the other buyer got it for £4550. It was clearly automated, though (like eBay) so it would have gone even higher if we had persisted. However, there was only one other bidder once we passed about £3500 so I think maybe next time we’ll be luckier.
Christophe’s DIY kit is 500euro without batteries, and he suggests a total of 3k euro for a 5kWh system which is pretty good. However, a Nissan Leaf holds enough batteries for nearly 5 such systems, so could be a really cheap way of building a handful of them. Timbo, would you be interested in buying a chunk of Leaf batteries? Inside the big pack there are 48 small fully packaged cells, so it’s easy to ‘break up’ a pack.
Battery pack ‘in situ’:
Close-up on individual cells (note the one cutaway to show the internal pouches that make up the cell):
Obviously we can’t use a ZOE as a donor since the batteries remain the property of Renault.March 11, 2014 at 11:23 #7912
Home storage is expensive I saw the cost of a standalone inverter and battery storage at 12 grand
While the DIY route seems much cheaper for a 12v 100ah battery at $1300 and $165 for a charge controller from a company that specializes in RV and large off grid systems.
I was hoping to use a few years after my initial solar install, it makes sense to wait for the cost of lithium batteries to either fall or rise as more and more battery factories come online…March 11, 2014 at 22:23 #7913
They are expensive, but that one seems excessively so – for example:March 14, 2014 at 19:33 #7937
nice links but again I think they are lead acid batteries, longevity is important and so is safety. I was looking for different battery chemistry and think sodium has a better prospect.
While lithium might be just right for a small portable solution ( for camping )
However I am waiting for prices to fall, as the going rate for batteries is still high or the price per
Kilowatt storage. We’ll just have to see in a few years…
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