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I currently have my EasySolar-II 5kVA MPPT 250/100 GX connected to 2x Pylontech US5000B batteries. I would like to add some additional battery storage.
Can I connect 2 more of the same units to my current setup?
I have considered I may need a second set of cables to go from the additional 2 batteries to the battery input breaker but I am unsure if there is any other considerations.
Have a look at the pylon installation manual, it has all the detail you need.
Remember, newest battery should be master.
Thanks for the reply. I have been looking at the Pylontech "Installation and operation" manual but I cannot see the information I am after and there is no information specific to the Victron EasySolar-II in there at all. Can you point me to the relevant info please?
To be clear I have read and understand the process of joining multiple Pylontech batteries together, I am specifically asking about considerations for connecting them to my Victron EasySolar-II and if 4x US5000B would be compatible and recommended?
I can't see any good reason why not but perhaps someone else with more experience than me can.
More battery is never an issue, your system is ultimately limited to what it can draw and charge and to the pylon cabling (100A constant) which should be sufficient for 5kVA (even though the batteries can supply more).
You could add the second set on their own dedicated battery cables, or daisy chain and connect the "spare" remaining + and - port at the top/bottom of the stack and run it back to the busbar.
https://en.pylontech.com.cn/view_pdf/web/viewer.html?file=/A_UpLoad/upload_file/20230901200039_8419.pdf&fname=RESS-Installation+Manual-US5000+US5000-B+5PMPA08-00219_V1.0.pdf
Page 26 shows a large stack which uses dual connections back to the system.
I thought it would be that simple but sometimes I think things will be simple only to find I'm in above my head.
I plan to daisy chain all 4 batteries but then run a second set of cables from the bank to the breaker. I tried to add a mspaint diagram but I keep getting an error when I add it.
I think I'll double check my plan with the supplier that sells both Victron and Pylontech and then do the difficult bit (parting with the dollars).
I'm connecting to a breaker that then connects directly to the Victron Easy Solar. I can easily connect both the pairs of cables to the one breaker.
You really want to make sure that the battery connections are as solid as possible.
From my understanding the extra pair of wires is overkill to begin with and I could realistically just use the one pair.
If you believe I have this wrong I am willing to be convinced otherwise, I just don't see how a busbar would be less resistance than what I am planning.
Just raising a consideration, if your system caters well for that connection then that is what matters. There is a lot of potential power on that bus, even if the inverter can't use all of it.
Having seen what happens when a connection goes bad, personally, I am always a fan of overkill :)
