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Once the relay is stuck, the inverter was unusable. It wouldn’t finish boot and just sat at the failure message. I had also tried turning off the grid and that leg went down (the other was still on and powered by the battery + CC).

Thank you! I popped the cover off the Deltron 375p and pushed on the relay, then powered it up. The error is gone now.

After about a year and a half my slave inverter in a 2 phase configuration has died. What was interesting is that it died in a strange way: AC1 and AC2 were bridged, so since grid power was still up, I didn't notice immediately that the inverter had failed. What was also interesting is that I...

Just to reinforce my point, I unplugged the com adapter around 1:30p and manually set the CC voltages higher at which I point the power immediately jumped back up. The inverters detected the high voltage and started sending excess power to the grid (around 80A), but then my BatSoc started to...

I get nowhere near that power output. 20 panels fast East-ish and 12 panels face West-ish (each orientation on different CCs). The panels are used poly panels from EBay ($30 each). In hindsight I didn't realize how expensive the mounting brackets would be, so I really should have bought fewer...

Just looping back to this thread to share my adventures: Per the post above by Hedges I bought the communications adapter and setup panels (32 x 240w) along with 2 midnite classics. This allowed my SMA 6048-US to see the incoming power, however I was finding that my power was strangely low. I...

I intend to create a big write-up in the future, but I'm still in the middle of my offgrid journey, so I'll save it for a little later once I have better conclusions. Today I just wanted to write a few notes about using the Sunny Webbox with my 2Phase2 6048-US system. This is information that...

What is the communication interface between the SMA 6048-US and the Midnite Classic? I can't seem to figure it out. Also, if you go DC coupled, how does the power transfer work? I expect that if the CC provides power when the battery is full, then a grid-tied inverter should start drawing...

Besides the basics of wire gauge/current/placement and fuse size what subtle things did you find that you felt were necessary?

I just wired AC1 to my main panel and AC2 to the grid, so PV is now on the island side. Yes, I generate way too much electricity for the small battery that I have, so I would prefer to dump to the grid which is why I am configured for GridFeed. @madsci1016 The BMS is internal and custom from...

I was considering a new post, but given that this thread exists I will try here first: I have been running a 2xSMA 6048-US setup running latest FW w/under-sized batteries (10KWh LiFePO4 w/internal BMS) for a few days now and while it is fully functional, I am having a heck of a time with...

First, thank you so much for sharing your knowledge and experience. It's been a bit of a slog to get here by myself, so please know that you are appreciated. Because of my battery configuration (posted elsewhere) I'm not sure that my SOC is being tracked correctly. My understanding is that...

Yes, this problem has occurred to me and I don't have a solution right now. I think that I will need to configure the Sunny Island to fail before the battery gets to 0. Presumably there should be a voltage setting to do this. I really struggle with the settings though because the...

Thanks! I'll check it out. That experiment didn't occur to me yesterday when I had it configured. I've ordered some more wires, etc for a more stable setup so my next chance to try again is this weekend. What I did see is that with the grid attached during battery charging I had a huge...

I wish that I could answer your questions but I have no idea. I literally assembled the system for the first time yesterday as a test. I ran it for about 8 hours to ensure that basic functions worked (PV comes up, charges battery, feeds excess to the grid, stress test running the entire house...

I see. Thank you for the correction. I misunderstood the earlier comment. In my case I have Enphase microinverters. They run on the AC1 side.

@Hedges it sounds like your Sunny Boy is on the grid side (AC2). Why is this? It seems like you'd put it on the load side (AC1) and then let the excess feed the grid. This way you never have to worry about whether the grid is up or down and the PV will supply power regardless of the grid's state.

I setup my system for the first time yesterday and ran into some similar problems. I am using 48V LiFePO4 batteries with an internal BMS, so I was unable to use the Lithium Ion battery setting. I tried using the "Other" setting and setting the battery parameters myself, but I could never get...

As the title says, can I mix inverters? Basically use 2 SMA 6048-US in a Master-Slave split-phase configuration with other brand inverters supplementing each leg.