Emerson/Vertiv R48 Rectifier

graememk · 12-03-2026 10:28AM

https://www.boards.ie/discussion/comment/124306165#Comment_124306165

I have the connector and cables that fit into the plug. I'll see what it's easier, Amazon or me sending you a few.

Cannot remember the name of them, but I'll look it up later

And yes can be powered by USBC. (Or any 5v usb)

micks_address · 23-03-2026 03:52PM

Hi folks,

I've already asked for far to much help here but the esp32 board and connectors arrived today. What's the process for wiring up and getting going in home assistant? Any how to guides for dummies?

Thanks

Mick

ptogher14 · 23-03-2026 04:39PM

Hi Mick,

Sorry can't help you out on the esp but how has this worked out for you so far. I am assuming the fact you have bypassed the inverter your stats and SOC etc are reading incorrectly?

micks_address · 23-03-2026 04:45PM

https://www.boards.ie/discussion/comment/124335042#Comment_124335042

soc reads correctly… the inverter doesnt see the extra power going into the battery from the rectifier but the bms (i guess) reports back the soc to the invertor. I've it set up to come on every night at 2.05 and then stop when either the battery hits 95% or time is 445 all via home assistant. Seems to be working fine.. only downside is im only getting about 9 or 10kwh into the car over the same three hours.. if/when i get to 16kva connection that will help the car.. dont drive every day so its ok at the moment. noise was the first concern but since i added the anti vibration pads and some sound insulation to the door if has calmed down enough not to bother anyone. I'm keeping a close eye on the temps etc in the space and its not to bad. Im dumping my batteries each night at around 10.30 down to 30%/1am.. trying to balance what i can import/export to maximise fit

ptogher14 · 23-03-2026 04:51PM

I would have assumed the SOC would have read incorrectly. I have limited knowledge on the subject but was of the understanding the inverter measured current in/out to calculate the SOC meaning this method would throw the value off.

Any concerns with running the rectifier to 95%? I've noticed my own (dyness) batteries cab start limiting current at 80%

micks_address · 23-03-2026 04:55PM

https://www.boards.ie/discussion/comment/124335078#Comment_124335078

by no means an expert either but others on the thread have suggestion the bms will keep things in check.. mines running at 57v some have said its better at 56v.. you can get them set to 56v at ordering or 57

on_the_roots · 23-03-2026 04:56PM

https://www.boards.ie/discussion/comment/124335059#Comment_124335059

3 hours is just too tight to charge a large battery + Heat Pump + EV.

I'm charging the EV almost every day to get what I need. When I need to charge more the EV I have to lower the rectifier to 40A max output.

I guess in the winter this is going to require a bit of a management on my 12kva grid connection.

mjatkey · 23-03-2026 08:27PM

https://www.boards.ie/discussion/comment/124334932#Comment_124334932

Hi, try github for HA integration, I use ESP32C and VP230 along with the github integration for the Huawei, worked ok with the Eltek too and the github has the wiring diagram too.

I'd say graememk will have the diagram for that ESP board.

https://github.com/mjpalmowski/CAN-BUS-control-R4875G1-with-ESPHome-and-MQTT/releases/tag/v001-SHTF-offgrid-edition

Emerson/Vertiv R48 Rectifier

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