February 21, 20242 yr I have a 5 year old Pylontech US3000C that's working well connected to a Must hybrid inverter that can't read the SOC - it's been operating mostly in UPS mode without any issues. I'm thinking of either adding an additional 3000C to allow for higher amp capacity. Is there any issue with connecting both a new and old pylontech battery in parallel? Should I rather sell and get a Dyness 5.12KW Lithium Battery BX51100 for almost the same price?
February 21, 20242 yr There are no issues adding a new battery. The new battery must be the master battery as described in the Pylontech manual along with how to add it.
February 21, 20242 yr I have 3 US3000C batteries. All bought at different times. Cycle count on them from oldest to newest. 738, 696, 469. No issues between them, Like JKKM said. Newest battery always the master.
February 21, 20242 yr My cycle counts are a little further apart. Oldest US3000 has more than 1000 cycles and newest US3000C less than 30.
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