Leisure Battery and stand alone Battery Charger
- Thread starter AllanD
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I am genuinely interested and sorry if I appear not to be. I would go look for myself but can’t find anything, you haven’t given enough information, do you have a link? I would like to get a better understanding of them in terms of comparison.
You’re using an external smart SOC monitor which measure cycles and other data (I see a reading of 8 cycles), but the batteries themselves can’t register the number of cycles completed or the current state of each cell (I’ll stand corrected
). I’m guessing that’s why they give a five year guarantee rather than an actual cycle guarantee, in other words if the battery fails below 2500 cycles, send it away, they see the internal data and replace it, something worth paying a little extra for that amount of time IMHO.
On the subject of the cost, some 50 ah Lifepo4 batteries far cheaper than the one I mentioned, I only mentioned it because it was the
same brand as the larger one I have.
This one on eBay would suit the op’s needs it states >2000 cycles, it’s an dumb EVE and comes with a 5 year warranty. Coupled with a cheap smart SOC monitor and shunt, what could go wrong?
Lithium, Leisure battery LiFePo4 battery, 50ah Motor home, boat trolling motor | eBay
12v 50ah lifepo4 battery. Nominal Capacity 50Ah. Cell Type EVE LiFePO4. Internal Resistance ≤20mΩ. Cycle Life >2000 cycles. No exceptions. Storage Temperature & Humidity Range Less than 1 month: -20℃~35℃, 45%RH~75%RH.
www.ebay.co.uk
AllanD
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This one on eBay would suit the op’s needs it states >2000 cycles, it’s an dumb EVE and comes with a 5 year warranty. Coupled with a cheap smart SOC monitor and shunt, what could go wrong?
Lithium, Leisure battery LiFePo4 battery, 50ah Motor home, boat trolling motor | eBay
12v 50ah lifepo4 battery. Nominal Capacity 50Ah. Cell Type EVE LiFePO4. Internal Resistance ≤20mΩ. Cycle Life >2000 cycles. No exceptions. Storage Temperature & Humidity Range Less than 1 month: -20℃~35℃, 45%RH~75%RH.www.ebay.co.uk
Thanks for looking and appreciate your suggestions.
FiFePO4 is an interesting option but one I need to rule out I’m afraid (at least at this stage) for a couple of reasons. The main one being battery management, if I installed one which had a good integrated BMS and added a monitoring system, Mrs. AllanD would throw a bit of a wobbly, something like “really, you mean we have a nice control panel up there that has bar graphs and shows volts and amps and things that tell us how our battery is doing but now it doesn’t (followed by several expletives
).So it might sound a bit boring but a good drop in replacement with lead acid chemistry is the way I need to go.
Polar Bear
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It took me ages to read through this post. I am not sure what the outcome is?
Can anyone tell me what are the best batteries to buy using the formula 'usable amps per kilogram', please?
Can anyone tell me what are the best batteries to buy using the formula 'usable amps per kilogram', please?
wildebus
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Off-grid - Lithium 100%
on EHU - as short a hookup cable you can use and a PP3.
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Stanski
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Sorry Polar Bear: There is no answer to your question as it is asked, you need to consider other aspects such as how many recharging cycles you need the battery to do in your ownership, how many years life you have left to take advantage of the energy stored and cycles available also the number of of amperes to be delivered per 24hrs (as an average) over lifetime of the user not withstanding the operating temperature and high current items that you need to power under WildCamping scenarios.