This could be interesting

[CommandoJoe]

Turned it on with a boost converter on the solar input, works great. Can't hook it up to a battery or actual solar just yet. I did start playing with the Wifi interface, which is really just RS232 (like actual real RS232, not UART).

The protocol is some custom thing that could just as well have been modbus. It takes commands in the form of e.g. "05 03 13 A3 00 01 71 28" (hex sequence, last two is the checksum, CRC16/Modbus). 05 03 is common to all commands, 13 can also be 11 depending on the type of command, the 00 sequence is always there, etc.

The response to the command above would be 05 03 02 38 02 DB 85 (bulk voltage 56.8V, little endian integer and /10). Responses seem to be always 05 03 02 followed by the data and again the checksum. There are also commands that return more data in one go.

I did not get the protocol documentation from them yet, but I don't think I'll need it. I'll document it once I'm done decoding it all.

I just reconfigured my setup yesterday with the new charge controller. Replaced a 24v 3kw PowMr AIO with a 36v WZRELB 3kw inverter, panels hooked up 5s2p 550w bifacials, and 36v 1000ah forklift battery pack (was running it w/ the PowMr with 6 cells bypassed). Initial testing of the inverter looks good - it handled the startup of my travel trailer's air conditioner (1200-1500w running) without issue, and then I turned on an oil filled radiator heater on high for another 1500w. Ran it at 2993w for several minutes. I finished everything late in the day so today will be the first full day of sun, but I did see 95a at 40v out of the CC at one point. My PowMr would top out with 80a @31v with the 24v pack.

I've got the CC, inverter, a 5kw 48v PowMr AIO, and 48v 200ah of LifePo4 batteries in a metal cabinet outside and I did get a high temp alarm on the charge controller. The cabinet does have an exhaust fan with it's own small solar panel and battery pack, but it wasn't running for some reason until I cycled the switch off and back on - I need to look into that. Opened the cabinet door and the alarm went away.

The monitoring software that works with it is just OK - I think I got spoiled with Solar Assistant... I wonder if I can get this working with Home Assistant somehow. Something else to check into...

 

[455dan]

If the quote was DDP, any tariffs should be taken care of already.

Good that we now have two Guinea pigs

three, I ordered two by the slow boat, so it will be a while. Will be Very interested to hear how these 500 V input units handle near their rated solar throughput.

 

[upnorthandpersonal]

The protocol is some custom thing

Correcting myself, it is Modbus. Makes life easier...

 

[Brucey]

First impressions: pretty nice build. I don't like the battery connection terminals, they're a bit small and hard to get access to.

I'll power it up and see if it all works before I take it apart further.

How's the fan noise on these? Temp controlled and ramps up with output or screaming from the start?

 

[upnorthandpersonal]

Ramps up, it's quiet while powered on from the boost converter.

 

[upnorthandpersonal]

Meet 'Tiny'. 48V, 1kWh, and can deliver 66A. Made with LF22K cells, 18650 cell for scale. No BMS for now, used for testing purposes only.