Emerson/Vertiv R48 Rectifier

Wonder would bigger washers on the topside increase the surface area for better conductivity?

Not really, since the actual contact area is the bottom of the lug with the connector. That's fine for the ~56A max this rectifier can deliver.

Yes, it should only run when your inverter is also charging.

It's fine to keep it running when charging is finished (100% SOC), since your BMS will simply stop charging no matter what is in the input. The only slight downside is that you won't have the "settling charging phase" (the last 1% slow charging that takes ~15min) because the rectifier will continue to throw its full charging capacity until the BMS stops at 100%.

All fitted, was only able to test for a few minutes as batteries were nearly full. I could see the house draw of combined solis and rectifier via myenegi app/home assistant but I couldn't see the extra charge going into the batteries.. need to test when they are emptier I guess. Noise might be a concern. I don't think it would wake us but you could hear it inside and outside the side of the house fair whoosh of it. Again I doubt it would wake the neighbours but we will see. I won't run tonight id rather dump some of the battery and do a test during the day for 3 hours and see how everything fairs out

Let us know how you get on, if I could turn down the fan speed a fraction would be a big help I think. I've lots of ventilation where it is so not that worried about heat. There's a can connection on the PCB connected to mine

You could remove the upper cover entirely and fit the rectifer into a plastic box with a large (but silent) fan on top.

Should you be able to see the extra power supplied by the rectifier on the Solis app/screen?

32kWh. Inverter alone can barely get 40% of that in the 3h EV window.

Where did you get those brackets? Looks very nice, with glands!

Running a charge test now. Have the inverter charging for 3 hours and started the rectifier 5 minutes later. Both running now. Battery soc at 21%. Solis app is showing the house load but doesn't show it all going to the batteries for some reason? It wasn't showing the full kw going to the batteries just with the inverter on its own. I'll keep an eye on the progress, temperature of the space etc over the next few hours. In theory should get 25ish kWh in over the 3 hours. Won't run any other appliances or the car charger during the window

Thanks,

Mick

Battery 2 BMS

Got my first can anyone else hear that humming noise from the cohabitants. It's probably no louder than a dishwasher running in the kitchen but will not ideal.. whether it wakes someone at night would be the deal breaker.

You sure your inverter has been capable to charge as much as you expect it to do? If it charges at 5kW you should see it going into the batteries.

If you have comms with the BMS it shows the total charging power.

Added some washing machine rubber mat material between the mounts and wall and seems to have taken away the hum noise completely. Ran at 2am for 15 minutes and no complaints. Will ramp up over the coming nights.

The 23 kWh was from the previous evening test run over 3 hours