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Post by lollygagger on Mar 26, 2020 14:25:00 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane whizz type retired...at 40.
Has just built his own 110Ah "12v" battery. I quote...
"So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors."
I can post more details if anyone's interested.
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Post by Deleted on Mar 26, 2020 14:28:37 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane geezer retired... Has just built his own 110Ah "12v" battery. I quote... So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors.I could do with one of those. If it’s really 4 x 105ah = 420 ah , that would set you back a lot more than £1000 off the shelf I would’ve thought.
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Post by lollygagger on Mar 26, 2020 14:30:16 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane geezer retired... Has just built his own 110Ah "12v" battery. I quote... So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors.I could do with one of those. If it’s really 4 x 105ah = 420 ah , that would set you back a lot more than £1000 off the shelf I would’ve thought. Cells, it would be 420Ah at 3V. Putting 4 together just gets more volts.
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Post by Deleted on Mar 26, 2020 14:32:02 GMT
I could do with one of those. If it’s really 4 x 105ah = 420 ah , that would set you back a lot more than £1000 off the shelf I would’ve thought. Cells, it would be 420Ah at 3V. Putting 4 together just gets more volts. Ah, Ok, makes sense now.
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Post by lollygagger on Mar 26, 2020 14:36:54 GMT
Cells, it would be 420Ah at 3V. Putting 4 together just gets more volts. Ah, Ok, makes sense now. As you can drain them, not to mention the fast charging, 110ah roughly equivalent to 220Ah lead acid so similar cost to a quality Lead Acid? I'm due a complete overhaul - batteries, solar... A couple of those would do me. 3 would be most excellent. £3000 I would not spend. £1200 I might.
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Post by Jim on Mar 26, 2020 14:38:41 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane whizz type retired...at 40. Has just built his own 110Ah "12v" battery. I quote... "So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors."
I can post more details if anyone's interested. Certainly worth a look at.
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Post by lollygagger on Mar 26, 2020 14:44:35 GMT
I'll see if I can pinch the pictures. I may be some time, it's like CWDF and you can't link to pics hosted there so I'll have to host them somewhere myself.
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Post by lollygagger on Mar 26, 2020 14:49:02 GMT
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Post by Deleted on Mar 26, 2020 15:00:04 GMT
As you can drain them, not to mention the fast charging, 110ah roughly equivalent to 220Ah lead acid so similar cost to a quality Lead Acid? I'm due a complete overhaul - batteries, solar... A couple of those would do me. 3 would be most excellent. £3000 I would not spend. £1200 I might. TBH my excuse has always been that we are on the move a lot and my battery gets charged up enough. As we don’t have much demand for electricity we’ve not really been able to justify shelling out for lithium batteries and solar panels....well until now!
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Post by lollygagger on Mar 26, 2020 15:04:07 GMT
And I haven't bothered yet because we're plugged into the mains. I've still managed to destroy a couple of new batteries though.
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Post by JohnV on Mar 26, 2020 15:11:02 GMT
That is a very attractive price ...... I think that if I needed more capacity it might be a route I would take (my batteries were second hand and were a lot cheaper otherwise I would probably have stuck with lead)
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Post by peterboat on Mar 27, 2020 13:33:50 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane whizz type retired...at 40. Has just built his own 110Ah "12v" battery. I quote... "So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors."
I can post more details if anyone's interested. Thats very expensive I can buy 140 ah batteries for less than that LifePo4s with BMS I can also buy bare cells for way under what he is paying
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Post by peterboat on Mar 27, 2020 13:39:54 GMT
That is a very attractive price ...... I think that if I needed more capacity it might be a route I would take (my batteries were second hand and were a lot cheaper otherwise I would probably have stuck with lead) john our batteries are 1.6 KWH I would think the above batteries to be under a KWH just not big enough to be any good, James does some bare cells which are very well priced and would make up a really good 24 volt battery for £375 to me 50 cells I think?
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Post by lollygagger on Mar 27, 2020 14:03:57 GMT
A friend of mine, who unlike me isn't an idiot - he's an RAF electrical fighter plane whizz type retired...at 40. Has just built his own 110Ah "12v" battery. I quote... "So far this has cost me less than £400, most lithium batteries are £800-£1200
Parts used are a BMS (Battery Management System), 4 x 105aH aluminium cased LifePo4 cells, a battery box with built in terminals. I also used a some 10mm2 cable. And some Crimp connectors."
I can post more details if anyone's interested. Thats very expensive I can buy 140 ah batteries for less than that LifePo4s with BMS I can also buy bare cells for way under what he is paying New?
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Post by lollygagger on Mar 27, 2020 14:08:02 GMT
That is a very attractive price ...... I think that if I needed more capacity it might be a route I would take (my batteries were second hand and were a lot cheaper otherwise I would probably have stuck with lead) john our batteries are 1.6 KWH I would think the above batteries to be under a KWH just not big enough to be any good, James does some bare cells which are very well priced and would make up a really good 24 volt battery for £375 to me 50 cells I think? The guy is doing it for fun for a tiny camper, he's only making this one and sharing his experience. It's for leisure DC, not propulsion or running your washing machine. I think Kris is interested in this application on this thread so I posted.
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