So, the slow process has started. This morning I wired a 3-point plug to the Solis, then discovered it only starts up if it has PV, carried it to the garage and plugged in some PV cabling. It works well.
Slowest relay test I’ve seen in my life. Makes my ABB PV-inverter look like a speed freak, and the ABB is already slow compared to the Multiplus. Not that it matters… you have a full minute to connect anyway. Just an observation.
I tried the Wi-Fi stick, and almost immediately gave up on it. After configuring it and putting it on the Wi-Fi, it appears I am now locked out of local access and it only gives me cloud access. I was hoping there’d be more one can do over TCP. Oh well.
Then I discovered I need a “Exceedconn EC04681-2014-BF” plug to connect to the modbus connection. Or… if you open the Wi-Fi dongle, you can also just unplug the PC-board and use the connector that came with the Wi-Fi stick. A bit overkill, but saves the time of getting the correct connector, and I’m not going to use the Wi-Fi stick in the long run anyway.
As a test, I connected the Solis to the output of the Multi (because at the time we also had load shedding). I tried to set the Grid standard to GEN50 (as I’ve seen recommended) but it had no GEN50 option, so I left it on NRS097. I was pleasantly surprised to see that it runs quite stably on the output of the islanded Multi. I even ran my tumble dryer, which normally I cannot do along with all the other loads, and it worked just fine with the extra capacity added to the output.
I’m fairly impressed. Next, we’ll see how easy it is to interface, or not. The downside: The interface is modbus-RTU, and will require some soldering
I’ll document how it goes here. Don’t expect too much progress too fast though. This is a side-project.