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I think I figured out a solution - treat the grid like a generator. Move the grid line in wires to Gen line in, which I believe can handle dirty power. Turn off TOU. Set gen charge batt % to something like 35% and gen charge amps to 180. This way, the grid is offline most of the time, and...

thanks for the explanation. That explains the periodic momentary flickering in my LED lights when there are no inductive loads locally to trigger them. after making the adjustment earlier today, no further disconnects, so fingers crossed.

Understood. 95% of the time, only 20w is coming from the grid. But that 5% is when I'm running 9000 watts/180A to top off the batteries. I think I could reduce my battery charge rate to 55A and accept a longer top off period. But when a hurricane is approaching and power is uncertain, bump...

thanks, very helpful. What disconnect rate would you consider acceptable? Number of times per day/week?

Have not heard of these. interesting solution, I could remove all grid input and let my inverter create a nice clean supply to my house. set the chargeverter to a charging voltage roughly corresponding to maintaining a 30% state of charge. However, I see no way to manage remotely in the units I...

Baja Sur does not connect to the Mexico grid, let alone the western US grid. There’s been talk of building an undersea cable across the sea of Cortez for the last 20 years, but no activity yet. All of our power is generated by two diesel plants and one propane plant in La Paz. Our town is at the...

I live in Baja, Mexico. The grid here is essentially an island, and we are at the end of the transmission line. So we have dirty power with wide swings in voltages, one phase dropping out, brownouts, and occasional frequency fluctuations. People complain of fried boards on refrigerators...

I guess I'm out of the loop then. The components for this system were selected by my local installer, and that's what was available. Hard to sneak 42kw of batteries over the border. But the last time I built a system myself in 2019, there were so many bugs in the inverter/battery...

I have a Solark 15 K and a Victron BMV 712. The Victron is much more accurate at tracking SOC. So was the Growatt that I had prior to this new inverter. All three systems use a shunt to measure net power. So I think a simple way to put this question is: why didn’t Solark invest a bit more...

Nope, still scratching my head. Here's an example of the last 6 days. For Oct 2, for example, my total load was 18.8 kw. But my solar production was 28.8kw. So I should have had a surplus of 10kw to put back into the battery. However, I ended up not even getting back to prior day SOC...

I have a Growatt 12000 SPF, Solar Assistant, and Victron BMV 712. I just installed the BMV712, and noticed a large discrepancy between the AC load in watts as reported by the LCD panel on the growatt (and also matched in Solar Assistant reports), and the load on the batteries as reported by the...

I was seeing this earlier today. My battery pack is LI-NMC 52 nominal volts, 45kw, 7 batteries total. The battery voltage dropped to 49.4 last night, and the growatt keeps throwing error #4. My battery cutoff voltage is set much lower than that. After doing a factory reset on the growatt, and...

Thanks for the information. Perhaps I’m missing something, but I’m not sure how your information explains why Growatt shut off the solar panels when float voltage was hit each day and switched to battery only mode? After setting float to match bulk, the panels were finally engaged for the...

In case anyone else runs into this with a Growatt inverter: After a lot of experimentation, I set float=bulk=56.6, and finally the growatt is using solar to feed the loads during the day.

I have just finished setting up a system with: 14 455w panels in two strings 42kw LG NMC batteries in 6.5kw modules Growatt 12000T MPV I have param 1 set to SBU. So I should see the PV array being used for house load during the day, with batteries coming in only if load > available PV...

OK, I adjuated the settings in the growatt inverter. Bulk charge 56.4, Float at 54.4. Did this at 10:30 AM, and a few minutes later the Growatt MPP controllers shut down with the batteries around 53.8. Ian at Watts247 thought the battery BMS might’ve shut down the packs and caused the inverter...

And what are you doing for float and min voltage values?

Thanks. I'm trying to understand your math. Is this correct? LG has not published a specific charge profile for this pack, so I'm using generic NMC charge/discharge curve values. Pack voltage (2p14s) Cell voltage Max volts 58.8 4.2 Min volts 42 3 Nominal volts 51.5 3.67 90% SOC...

I’m trying to determine the correct bulk/float voltages for my batteries to set in my inverter. Inverter is growatt 12000T Batteries are an LG NMC Lithium battery. Each battery is 6.5KW, so over the 7 batteries in the pack, 45kw total. These batteries were planned for an off-grid...