so I have 4x victron smart 330ah, recently was given a pytes v5a
nobody will buy my victron batteries, new 330ah are not available anymore? so I’m stuck with them. how can I add the pytes?
can pytes run as dumb battery and I just parallel? both are 16s
or do I run the pytes CAN and stop using victron smart and use the victrons as dumb batteries? but then the total ah is hard coded by the pytes? so then soc% will be wrong?
what about the new victron smart ng 51.2V 100ah? its more expensive but will it work combined with the old smart batteries?
please advise with your ideas, skip the posts about voiding warranty I will risk it for the biscuit
The victrons bms can be parallel connected (some caveats) its in the manual.
For parallel connection of any other type of battery the real question is do they use the same charge voltages? This matters a bit more than their AH and capacity.
ok it works fully charged now 56.8v. during flat V curve (20-80%) the majority of current the 4 victrons were taking on during charge discharge. as they started getting fuller the current % shifted to the pytes you can see it ramping up more and more as victrons got full. eventually at max V it at settled equaled out no alarms or errors since both types of batts are exactly the same 16s and lifepo4. I suspect when I add more pytes in groups the current sharing will equal out.
I’m running pytes open loop using victron smart bms
it means the bms inside the pytes is working only internally, its not communicating with cerbo. the victron smart bms is controlling the victron smart batteries, and the pytes is connected in parallel blindly. it charges discharges and all the Voltage Amp limits are as if it were another victron smart battery. both are 16s 51.2v lifepo4 so should be fine, just need to add more pytes now to get even balancing of current, i started with 1 as a test
Of all the solutions this is probably one of the worst. Please use some kind of BMS aggregator. If one of the Pytes requests a lower CVL or CCL for whatever reason, theres no way of reacting to that for the Victron system currently.
With all the flammable material all around those batteries theres no need to also increase the risk of a cell overheating
