My new system will have (2) multiplus II 5kPV in split phase. I’m using a SmartSolar 450/100 and (2) EG4 wallmount batteries in parallel. I’m assuming that each multiplus will connect to a different battery (but they are in parallel) but I’m not sure which battery to connect the charge controller to. Or do I just use a lynx distributor along with the shunt to make all of the connections?
You only have one DC system/battery.
Here at Lynx, the 450/100 and both multis are connected.
The shunt will then most likely be connected to the negative terminal of the two batteries… in order to measure them… here you will need to connect the 2 negative cable to the shunt and then split it again, or use a larger cross-section to the Lynx Minus … although the solution with the two individual cables would probably be better for connecting to the Lynx.
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Makes perfect sense. Thank you.
All dc components should be connected to a common dc busbar. The lynx bus bar system would be ideal. In your situation I would consider a lynx power in and distributer whether or not combined with a lynx shunt.
Is there BMS functionality in your batteries?
Also read up on synchronising cable runs before start.
according to linkes video, EG4 batteries shall support Victron.
Communication
Connect your 2 batteries via RS485 to build up a stack. Connect the stack master via CAN-bus to battery CAN in Cerbo or GX.
Select protocol VCT on your EG4 master.
Address DIP switches must be either 0 and 1 or 1 and 2. Master has the lower value.
You do not need the shunt in this configuration. The EG4 BMS will transfer SOC and much more data like DCL, CCL, CVL to Victron for optimal usage.
Energy
Connect both batteries to a Lynx Distributor. Also connect the both MP2s snd the MPPT to a Lynx Distributor. As you need 5 ports, you need two distributors, each having 4 ports.
I would create o e battery Lynx and one Lynx for the Victron gear. You can put a heavy duty switch or NH switch between the two Lynx’s.
Fuse monitoring
Check out my build thread about how to monitor fuses in Lynx Distributor
