Post by Deleted on Nov 27, 2021 8:40:13 GMT
Disclaimer: I am a very low power consumer on the off grid craft and I have access to mains power elsewhere.
So I bought "a few" of these LTO electric bus batteries.
eBay item www.ebay.co.uk/itm/274877454668
They are very nice modules. A bit unusual in that the voltage is around 14/15v as they are 6s lithium titanate batteries so not ideal for direct use on 12v as some 12v equipment will dislike it.
So anyway. The idea I had was to connect a charged one (which is a 15v 40ah battery) directly to my little onboard LiFePo4 bank which usually sits between 13 and 13.2v.
Overnight the LTO has donated around 22amp hours to the LiFePo4 on account of the voltage difference.
So the same effect as running a very small generator and charger for an hour.
Seems like a nice little solution as a way to transfer remote mains power . My daily use is about 20ah on this boat.
LTO batteries have very long lifetime, capable of being charged very fast too. Cycle life in the tens of thousands if used lightly.
A little bit on the heavy side but not as heavy as lead acid.
These also make incredibly effective jump starters as a 40ah module is happy to discharge 400a in any temperature down to well below freezing.
Handy batteries I reckon.
The LiFePo4 is supported by solar and has a fairly light wire connection to the AGM engine start battery which is of course slightly lower voltage than the LiFePo4.
The point is that this means one does not need to take the battery off the boat to recharge as you can use the LTO. I managed to charge the LTO with a normal lead acid charger. max allowable voltage is 16.8v and they are very stable and unlikely to run away.
So I bought "a few" of these LTO electric bus batteries.
eBay item www.ebay.co.uk/itm/274877454668
They are very nice modules. A bit unusual in that the voltage is around 14/15v as they are 6s lithium titanate batteries so not ideal for direct use on 12v as some 12v equipment will dislike it.
So anyway. The idea I had was to connect a charged one (which is a 15v 40ah battery) directly to my little onboard LiFePo4 bank which usually sits between 13 and 13.2v.
Overnight the LTO has donated around 22amp hours to the LiFePo4 on account of the voltage difference.
So the same effect as running a very small generator and charger for an hour.
Seems like a nice little solution as a way to transfer remote mains power . My daily use is about 20ah on this boat.
LTO batteries have very long lifetime, capable of being charged very fast too. Cycle life in the tens of thousands if used lightly.
A little bit on the heavy side but not as heavy as lead acid.
These also make incredibly effective jump starters as a 40ah module is happy to discharge 400a in any temperature down to well below freezing.
Handy batteries I reckon.
The LiFePo4 is supported by solar and has a fairly light wire connection to the AGM engine start battery which is of course slightly lower voltage than the LiFePo4.
The point is that this means one does not need to take the battery off the boat to recharge as you can use the LTO. I managed to charge the LTO with a normal lead acid charger. max allowable voltage is 16.8v and they are very stable and unlikely to run away.
