Running an ESS setup, I want to connect an additional 48V charger, looking at the one linked below (please let me know of a better one). Am I right in saying there is no need to get them communicating with each other. Probably wise to get a smart shunt so the Cerbo GX knows the battery percentage.
Simple reason why is I want to connect my EV which supports V2L. I get free charging at work, would be very nice to discharge the car battery into my house battery. And also in the event of a blackout, the car should support the house for a couple of days at least.
My main concern with that charger is that there does not appear to be a way to set the voltage. Unless I missed something.
I would not want my batteries charged to 58.7V (as shown on the display) until it auto-powers off. Maybe the 54.6V “Li Ion” variant is ok (the one you linked) if that suits your batteries. The current level is clearly adjustable.
For anyone looking to do something similar. I chose a 1500W one from Aliexpress. Connected a smartshunt too, not sure if that is really required as my battery has a BMS which calculates the percentage. I have two batteries in parallel and this does seem to cause a mis-calculation which causes the voltage to drop slowly when not charging to 100% over many cycles.
The pots on the bottom right set the voltage and current limit. It works well. I have a 40A fuse on the output and I’m thinking of getting some MOVs to protect the battery is the charger fails short.
