How do you connect a PM-LV rack battery to a hybrid inverter using CAN or RS485?

Direct answer: Confirm that your inverter model and firmware support the battery’s protocol, set the battery address (DIP switch) for the master and any slave units, use the communication cable and pin-out specified by Redway, select the matching battery type in the inverter, and only then power up and check that the inverter reads the battery’s state of charge and limits. Pin-outs and protocol settings are not published on the pages, so get Redway’s integration sheet for your inverter first.

What the pages list: the PM-LV51100-3U-PRO (51.2V 100Ah) and PM-LV48100-3U (48V 100Ah) list RS485 / RS232 / CAN-bus communication, a “Manual DIP Switch” (automatic DIP optional), accessories including inverter power cable, parallel cable, communication cable and grounding wire, and a “Compatible Inverters” list naming brands such as Victron, Deye, Growatt, GoodWe, SMA and others. The PM-LV51200-5U lists RS485 and CAN bus and a similar brand list. A brand on the list is not proof that every model and firmware of that brand works.

Step 1, check compatibility: ask Redway which protocol to select for your inverter model and firmware version, and whether CAN or RS485 is the preferred link. Many inverter makers also publish their own battery compatibility list; check that it names the battery or protocol.

Step 2, set addresses: with several packs, one is usually the master that talks to the inverter and the others are addressed slaves linked by parallel communication cables. The DIP-switch positions for each role come from Redway’s manual. Set them with the battery switched off.

Step 3, wire it: connect DC power cables with correct polarity, size and fusing, the grounding wire, and the communication cable from the master’s CAN or RS485 port to the inverter’s battery port. Ports may share the same RJ45 shape but have different pin-outs, so use the specified cable rather than a generic network lead.

Step 4, configure and test: select the lithium battery type or protocol in the inverter, power the batteries, then the inverter. Check that the inverter shows the battery’s state of charge, voltage and charge/discharge limits, and that a communication alarm appears if you unplug the cable. Record the settings. For mixing packs, see paralleling PM-LV batteries of different ages; for choosing the voltage class, see 48V vs 51.2V rack batteries.