Hi all,
I'm currently designing a home solar system that will use Winston LiFePo batteries to store excess energy.
To keep the initial costs down, I'm going to use 16x 300Ah cells in series to make a 48V 300Ah bank. I'll be using the GWL BMS123 to manage the batteries.
This bank will be connected to a Victron Quattro inverter and 18x Solar panels via 2x Victron MPPTs. I'll also have a Colour Control GX module setup in the ESS config
I'd like to design the system in such a way so that I can add additional battery banks of the same type later in parallel to the original one to give more storage. As far as I can tell, this is possible with the BMS123 system, I'll just need additional BMS kits per bank. However there's a line from the manual which has me confused
Multiple battery packs parallel When you have to connect multiple packs parallel, you need 1 complete BMS per pack. You can connect the signal relays on each End Board in series. For instance: with 3 packs parallel, you can run the charging signal through from the first End Board Charge relay to the second Charge relay and through the third Charge relay. This signal can switch an enable/disable or power relay. The same goes for the Load relays in series.
If anyone has any experience with this kind of setup, can you please help me figure out what they mean by connecting the relay signals in series?
Also if there's any other advice for connecting banks in parallel, I'm all ears