What can I do for home battery system using 36v batteries?

[karlbar2k]

Hi all, I have found a reasonable amount of 36v lifepo4 batteries (50ah so 1.7kWh each approx) but when looking for inverter/chargers everything seems to be 12/24/48.
Are there any options available in 36v as a lot of these batteries seem to be available from the rail industry here in the UK?
TIA, Karl

 

[kommando]

If you can find out what cells are inside you could buy four 36V and dismantle to rebuild as three 48V as an example.

 

[efficientPV]

You might be able to use a 60V inverter. I use one directly with solar panels. 72V is within their range. 60V systems have some popularity in Europe.

 

[Q-Dog]

AIMS does/did make at least on 36 volt inverter, if you can find it. Some Victron SCCs can work at 36 volts.

 

[karlbar2k]

If you can find out what cells are inside you could buy four 36V and dismantle to rebuild as three 48V as an example.

I did consider this but want to keep the integrity of the batteries if possible as they are good quality

 

[karlbar2k]

You might be able to use a 60V inverter. I use one directly with solar panels. 72V is within their range. 60V systems have some popularity in Europe.

I tried searching for 72v and 110v (108) but again nothing like an inverter/charger for 48v.

 

[karlbar2k]

So further digging and Eaton UPS stuff seems to have some 72v architecture but if utilising a UPS which is effectively a charger inverter how do you modify it to provide power based on draw and solar cycle? I know turning the power off to the input is going to make the UPS kick in and supply the load but how would yo go about automating it to mimic a hybrid inverter charger system?

 

[cs1234]

Can those batteries actually run in series? Most lifepo4 batteries higher than 24vdc can't be put into series.

 

[matt D]

ive got a system comprising of 10 x valence 36v xp batteries which are what you have if im not mistaken , mine are set up in a 5 series 2 parallel bank which is around 200v DC , the newer inverters will work with these higher voltages . I have a SolaX g4 hybrid inverter and it works really well. You'll need a BMS to manage the batteries , ive had a genuine valence UBMS reprogrammed to work with my set up , its the only way to reliably and safely use the batteries , the UBMS controls a safety cut off relay. PM if you want any more info , Id be interested in 5 more batteries if you have a surplus. I have UBMS programmed for 5s2p set up of 36xp batteries to trade etc. cheers

 

[Ken_C]

I've got one of these on a 36v battery bank. https://analyticsystems.com/product/ipsi1200-20-110/
Input voltage range is 20-45vdc, you can find them online around 500ish