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I now have Solar Assistant up and running. Love it! Better than the Shine app (when it worked for me).

I am trying to get my system back online so I can monitor what's happening WRT solar production, solar charging, utility charging, utility bypass, battery SOC, etc. Very important to me so I can time when I charge my EV from the off-grid system and when from the utility. I am trying to make...

I changed out the board and the inverter came back online. Now I need to get the WiFi dongle to speak to the inverter so I can see the status of the system via the app and online. I'm in the middle of trying to write the inverter SN to the new controller board, per Growatt's instruction. Not...

@BenFromSignatureSolar Looks like you hooked someone else up with the assistance I need to change out the control board on my SPF6000T DVM-MPV. It bricked after an attempted firmware update. Sig Solar already sent me a control board and I am ready to install it.

I saw a picture of someone opening the unit and had the same thought. Looks like there’s a ribbon cable to the controls/display on the front. Anyone out there know of a video or post with pics showing the procedure for replacement?

After a number of calls and submitting a video of the current state of affairs to signature solar they were going to take back the unit and send me a new one. But the hassle of taking this hundred pound unit off the wall and shipping it back to them seemed greater than the trouble it might take...

Do you usually get responses quickly? I emailed this morning (I'm on Eastern time).

Not at all. I installed the driver for the ISP tool and the PC recognized the inverter. I unzipped and, using the ISP tool, browsed for the bin file that was in the folder you linked to and flashed the inverter. It shut down and the CHG light came on as the instructions stated it would. And...

Do you have nay other contact info?

@Pete@SolarBatteryBarn: Unfortunately this firmware update did not take and now my inverter is dead. I will reach out to Francis Liang for support. Are they stateside or in china?

I now I wished I’d gotten the 8K model. As of now when I’m charging the EV the wife can’t make tea with the electric tea kettle without causing a fault. Because my kitchen has got a couple of multi-wire branch circuits I had to move more over to the off-grid system than I originally planned.

@Pete@SolarBatteryBarn I still get those data spikes. How do you update the firmware and where do you get it?

The utilities are in it to make money, and they are trying to maximize that. There are reasonable arguments that say managing the unpredictable ebbs and flows of all us small guys feeding the grid makes it harder, and that the grid is expensive to maintain to begin with. You ask me, it should...

You will need way more panels than you can fit on your truck, unless your work day’s a week long. ?

If 50 kW they are likely DC fast chargers.

Please post the wiring diagram, or if you prefer we can work out a way for you to share it with me privately.

We are in the middle of our first year attempting to get to net-zero with our household and one (recently purchased) EV. As mentioned previously, the EV requires more energy than anything we currently run. Charging the car takes more juice than running an electric clothes dryer, and one needs...

Update: we bought an EV and I've added yet another transfer switch so I can charge from my off-grid system when the sun is shining and from my grid-tied at other times. I bought a charger that allows me to squeeze the current down to a few settings: 10, 16, 20, 24, and 32 amps as I can only...

I agree. It would be nice if we had better documentation and engineering support for growatt here in the US. All I can tell you is my unit seems to be functioning very well and it behaves in every way as if it is a well engineered and well-built machine. Add to that the fact that growatt is a...

Sounds right. You have to size these things for the potential surge and not plan on running them maxed out for a long period of time. I have a 6000 W unit and I am mostly pulling 1 to 3K at a time on both legs combined with occasional surges that get me close to 2.5 and 3K on a single leg.

All of the inverters in this line (SPF xxxxT DVM) are split-phase and will support half the rated load on each leg. You do want to be careful to balance the load as well as you can, especially if you are maxing out the unit.

Definitely switch to 60Hz in the US. And go with the SBU priority (solar, battery, utility) to maximize your solar generation. You are maxing this inverter out as it is designed to run up to 3kW per leg / 25 amps at 120v and though the unit is low frequency with autotransformer and handles...

Yes, our situations are very similar. I was also running in the green with the utility before I started working from home. Lucky us that we have decent net metering rules in effect. Although New York is adjusting ours to the detriment of the solar generators like us.

I have been running a 6000T for about 4 weeks now and love it. Here's a post with my system details: https://diysolarforum.com/threads/supplemental-6k-off-grid-system-growatt-spf600t-4-eg4-lifepower4-in-rack.43053/ I had one overload fault that shut down the inverter when I accidentally...

My Shine app also only tracks power from the grid that goes to charge the battery as "imported". Grid power taken up in "bypass" mode is not tracked. Not sure why, but the tracking appears to only consider PV/grid power that passes into the batteries or through the inverter.

I recently installed a 5K array on my roof and a 6K hybrid/off-grid inverter with autotransformer/split-phase output (Growatt SPF600T DVM-MPV) and 4 EG4 48v, 5.12kWhr batteries in a rack to provide uninterrupted power to the critical loads in my house and my business computers (vs installing a...

Thank you! I will add a jumper in my main transfer switch as shown below. One side-note for those who want Signature and Growatt to tell us how to do this. I work in the construction field and it is the responsibility of the owner/architect/engineers to design the projects so that they meet...

@timselectric, would I be correct to say that if using the inverter as a true standalone, i.e. no grid input for bypass or charging, then you would consider the inverter a separately derived system with independent neutral and bond the neutral to ground, but that if using with the grid assist...

@RichardfromEG4: I have seen a picture of an older model LiFePOWER4 with grounding screw but mine do not have anything that is clearly labeled as such. Please see the image attached and advise. I have 4 batteries in a rack with bus bars. Also, I assume can run the ground to my house EGC (which...

Not sure I understand why, as in both modes power is delivered to the sub panel via the auto transformer with center-tap for neutral. But we could write a book with the gaps in my knowledge, But you are of the opinion that if I create a common neutral then all is OK and no iso transformer is...

@timselectric: but if my sub panel ground and inverter ground are both running to the main panel ground and therefor EGC (which they are) then I should not have an issue with breakers not tripping, is that correct?

Thanks again @timselectric. And given that I am not seeing the neutral current return on the inverter ground, is it safe to assume I do not have a ground neutral bond in the inverter, and that the autotransformer center tap is not grounded?

Thanks @timselectric. I am reading your posts here and it seems you are suggesting I have a safety issue if my system is out of balance OR if the load on the utility transformer is out of balance (me and my neighbors) which is of course out of my control. What is the danger? And it also...

@Kornbread, I got the same results measuring current on the ground and neutral when in bypass mode or inverter mode. The only difference was the less than 2v measured between ground and neutral when in bypass. I see now that a lot has been discussed here between the last time I read this...

@SignatureSolarUS @SignatureSolarRay @SignatureSolarJames @SignatureSolarAdam @Will Prowse I am using the 6K version of this inverter (SPF600T DVM-MPV) and wanted to get it up and running and perform some tests before chiming in with my thoughts regarding the utility bypass function and the...