MtB Posted April 4, 2018 Report Share Posted April 4, 2018 I'm up for buying one to experiment with. I've just emailed them asking what price they are. Odd they don't seem able to tell us. Or at least no-one here seems to have mentioned a price as fart as I can see. One thing to note is whereas all other lithiums I've looked at are one large cell on a box, these are dozens or hundreds of tiny cells apparently connected in parallel/series. This means cell balancing is impossible and if one cell gets out of balance and fails from overcharging, I can imagine it taking down all the others in the box. Link to comment Share on other sites More sharing options...
mrsmelly Posted April 4, 2018 Report Share Posted April 4, 2018 9 minutes ago, Mike the Boilerman said: I'm up for buying one to experiment with. I've just emailed them asking what price they are. Odd they don't seem able to tell us. Or at least no-one here seems to have mentioned a price as fart as I can see. One thing to note is whereas all other lithiums I've looked at are one large cell on a box, these are dozens or hundreds of tiny cells apparently connected in parallel/series. This means cell balancing is impossible and if one cell gets out of balance and fails from overcharging, I can imagine it taking down all the others in the box. No need to phart just because you cant find a price!! Link to comment Share on other sites More sharing options...
WotEver Posted April 4, 2018 Report Share Posted April 4, 2018 Just now, mrsmelly said: No need to phart just because you cant find a price!! I just thought he was after a smelly boat 1 Link to comment Share on other sites More sharing options...
MtB Posted April 4, 2018 Report Share Posted April 4, 2018 Yes I noticed the typo but decided to leave it in, lol! 1 Link to comment Share on other sites More sharing options...
peterboat Posted April 4, 2018 Report Share Posted April 4, 2018 5 minutes ago, Mike the Boilerman said: I'm up for buying one to experiment with. I've just emailed them asking what price they are. Odd they don't seem able to tell us. Or at least no-one here seems to have mentioned a price as fart as I can see. One thing to note is whereas all other lithiums I've looked at are one large cell on a box, these are dozens or hundreds of tiny cells apparently connected in parallel/series. This means cell balancing is impossible and if one cell gets out of balance and fails from overcharging, I can imagine it taking down all the others in the box. Mike buy what I bought they have a balancing board inside which you activate when you connect it to the computer, as of yet they are staying in balance on their own so no issues Link to comment Share on other sites More sharing options...
rusty69 Posted April 4, 2018 Report Share Posted April 4, 2018 49 minutes ago, WotEver said: I just thought he was after a smelly boat No ones mentioned ecofans recently. Required to clear the smell (just for mr Putin) Link to comment Share on other sites More sharing options...
Johny London Posted April 4, 2018 Author Report Share Posted April 4, 2018 There could still be an advantage - quick recharging and no sulfation? Certainly its a bit of a blow regarding usable capacity. (I think that going over 70% will be giving too high a voltage - prolly end up blowing all the 12v stuff). Link to comment Share on other sites More sharing options...
Dr Bob Posted April 19, 2018 Report Share Posted April 19, 2018 On 04/04/2018 at 17:29, peterboat said: Mike buy what I bought they have a balancing board inside which you activate when you connect it to the computer, as of yet they are staying in balance on their own so no issues Can I ask a dumb question? Maybe Peterboat can answer. The 12V (nominal) Li Fe battery will have 6 cells in series as per a lead acid. With lead acids, as you build a bigger capacity battery, you just make each of the 6 cells bigger. For Li Fe how do you do it? Can you make the cells bigger or do you have multiple sets of 6 cells in parallel? If the latter, what is the optimum size for each cell and how many cells total would a 110Ahr Li Fe have? Peter, do you know many cells are in your batteries? Link to comment Share on other sites More sharing options...
MtB Posted April 19, 2018 Report Share Posted April 19, 2018 On 04/04/2018 at 17:22, Mike the Boilerman said: I'm up for buying one to experiment with. I've just emailed them asking what price they are. Odd they don't seem able to tell us. Or at least no-one here seems to have mentioned a price as fart as I can see. One thing to note is whereas all other lithiums I've looked at are one large cell on a box, these are dozens or hundreds of tiny cells apparently connected in parallel/series. This means cell balancing is impossible and if one cell gets out of balance and fails from overcharging, I can imagine it taking down all the others in the box. Ok some feedback. I contacted them citing their claim to be selling at prices competitive with LA batteries asking for a price for a 100 ah battery. They responded asking what the application was. I explained I wanted one to play with on mebote. They referred me to technical dept who suggested I buy four batts at about £300 each, and ignored my technical questions about charging. Consequently i ignored their proposal and its all gone quiet. Link to comment Share on other sites More sharing options...
peterboat Posted April 20, 2018 Report Share Posted April 20, 2018 13 hours ago, Dr Bob said: Can I ask a dumb question? Maybe Peterboat can answer. The 12V (nominal) Li Fe battery will have 6 cells in series as per a lead acid. With lead acids, as you build a bigger capacity battery, you just make each of the 6 cells bigger. For Li Fe how do you do it? Can you make the cells bigger or do you have multiple sets of 6 cells in parallel? If the latter, what is the optimum size for each cell and how many cells total would a 110Ahr Li Fe have? Peter, do you know many cells are in your batteries? Bob they only have 4 cells at 3.2v nominal, in my case each of those cells is made up of a block of 100 cells in parallel, then the 4 blocks are put in series. So in reality I have 400 cells in my battery thats why in some cases a BMS is needed. Mine are Lifepo4 batteries by Valence 1 Link to comment Share on other sites More sharing options...
Richard10002 Posted April 20, 2018 Report Share Posted April 20, 2018 On 17/03/2018 at 11:48, Johny London said: Not heard from the guys at Acceleron, but I've mailed them, summing up our requirements and concerns, so I will let you know what the response is. In the meantime, Jono is making (somewhat lengthy) progress... I must say, this level of install does look a tad daunting - not to mention costly. £3600 for his batteries alone, (perhaps less his JONOPROMO 10% discount).... Link to comment Share on other sites More sharing options...
Richard10002 Posted April 20, 2018 Report Share Posted April 20, 2018 On 28/02/2018 at 21:10, peterboat said: He is a silly man I bought 8 x 138 ah lithiums for less than his 3 and mine are from Valence who have a history of using these on boats. I put two on charge with solar the other day they just suck up power so fast and can push the amps out without dropping the volts so much better than the trojans they replaced Where from? Link to comment Share on other sites More sharing options...
Johny London Posted April 20, 2018 Author Report Share Posted April 20, 2018 I have seen those Victron Batteries at under £900 now - if these are the same ones... https://www.ebay.co.uk/itm/Victron-LiFePO4-Lithium-Ion-12-8V-90Ah-Battery-wind-solar-off-grid-storage/253067185962?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649 Meanwhile, Aceleron gave me prices. "Standard 12V 100Ah units range from £720-£875 depending on features and terms, and our 24V 100Ah (not a standard production model) runs between £1100-£1300. We could provide volume reductions as well." In that case, I'd go with the Victron out of the two. So much for prices comparable to standard l/a Link to comment Share on other sites More sharing options...
Dr Bob Posted April 20, 2018 Report Share Posted April 20, 2018 4 hours ago, peterboat said: Bob they only have 4 cells at 3.2v nominal, in my case each of those cells is made up of a block of 100 cells in parallel, then the 4 blocks are put in series. So in reality I have 400 cells in my battery thats why in some cases a BMS is needed. Mine are Lifepo4 batteries by Valence Peter. Thanks for the info. Very useful. Link to comment Share on other sites More sharing options...
peterboat Posted April 20, 2018 Report Share Posted April 20, 2018 3 hours ago, Richard10002 said: Where from? Have a look on ebay his name is James he is in richmond London I have a number for him if you want it? Link to comment Share on other sites More sharing options...
George and Dragon Posted June 2, 2018 Report Share Posted June 2, 2018 (edited) On 24/03/2018 at 12:29, WotEver said: Edited June 2, 2018 by George and Dragon superfluous Link to comment Share on other sites More sharing options...
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