Hi all,
I have had this system in about 4 years now, I really want to move over to lithium battery system however it's too expensive for me to do so on a 48v system.
What options do I have to convert the battery output from 24v to 48v with an inverter. I am aware this will effect my AH output of the battery system too.
Thanks in adavance.
This is not practical to do. Basically, you'd need a DC-DC converter which can provide 200A constantly and 400A peak. If you could find something like that it'd likely cost a lot more than a 24V MultiPlus. Then the losses would be quite high.
I'm curious as to how you have managed to find a 24V battery system cheaper than the multitude of 48V batteries available. I tried to find sensibly priced 24V battery systems and the 48V options were always cheaper all in. Even a set of cells for a DIY build 24V bank cost a lot more than a Pylontech battery set - for example.
what I mean by cheaper is if I was to buy a lithium battery system at 48v it would cost me a lot more than a lithium battery system at 24v. I currently used AGM Marathon battery's however some need replacing. Might just replace if its going to cost me a new inverter.
Dale its easier work in Kw stored capacity as its easier for most to calculate the real stored power in the battery bank.
ie L/A 48v 200 A/H is 9.6Kw of stored power if its lead acid then you can only use 50% max or 4.8Kw (when new and this falls off quickly if you cycle them)
Lithium is 51.2v 100 A/H is 5.1Kw usable 4.6Kw at 90% Discharge (if you cycle them the fall off is very low ie after 4000 cycles you still have around 80% of there original capacity)
so look for a smaller bank, the liFeP04 should be cheaper then L/A these days.
A lead acid battery size you can only use a MAX 50%
a Lithium phosphate you can use 100% but most recommend max discharge to 90%
so with the extra efficiencies you get from Lifep04 you only need about half the size bank to give you the same usable power.
and they last Soooo much longer
split the bank in two and run them in series so you have 48V .
