Recent content by Roger Harding

I am wondering if it is too low. I recently experimented with my Growatt, trying to get it to charge with more amperage at high states of charge. I did so by switching back to the user settings from the lithium settings and it actually reduced the charging current even further than it was on...

As an update to this, just for fun, I did shut off my main breaker and ran off-grid with the Growatt 12K and my AC coupled Solar Edge grid-tied system for 100 hours. It ran perfectly, even charging the battery at nearly 7kW at times. Part of why I added the extra capacity is so that it would...

I did see an interesting event recently when running ac coupled where the Growatt started throttling the PV input as the battery got to 95% and then at about 97% I saw one phase had briefly shut off, which caused my grid-tied inverter to shut off. I thought that may have been intentional. I...

Upon further research, the Growatt LF inverters DO support AC coupling, but DO NOT support frequency shifting, so manual disconnection of the grid tie input or managing of loads will be required. So it is like 90% win for me, since my 3.15 kW array maxes at about 23kWh per day, and I have a...

That isn't a bad idea. What I wish I could do is have the Growatt and Solaredge inverters communicate since they both have RS485 ports.

I am only going to disable it on 1 of the 5 battery banks, not all of them. That way I can instantly enable charging if the Growatt doesn't shut down the grid tie inverter, giving the power somewhere to go. It is a 200a BMS set to 150a charging on a 15.5kWh battery, so it will easily suck up...

It may not be advertised as such, but it is not giving me any problems at all. I would have figured that it would have instantly given me a fault warning as soon as output started backfeeding. The ShinePhone app even shows when it switches from Discharging to Charging, so in some capacity it...

Yes sir.

There are 5 battery banks, each with their own BMS, and only two of them are connected to the Growatt communication. What I may do is shut off the grid tie, power down the three banks that are not connected to the Growatt so that they are not quite as charged as the EG4 banks and let them get a...

Here is what the Growatt screen looks like, showing that it is not operating in PV or AC input.

There are, but those settings don't apply in this case. The PV power is not going in through the PV input, and the AC power is not going in through the AC input. It is set to Utility first, but that probably only applies to the AC input terminals.

Yeah, I am monitoring it very closely for that reason. If I see the packs much above 99% and nothing has changed I will start charging my car again.

I do not have the Growatt input from the mains turned on at all. The input to the inverter, as well as the output from my inverter are both coming from the same panel, and cannot be on at the same time. All of the excess power from the grid tie is going into the Growatt through the Growatt...

I just emailed Growatt to ask if these support frequency shifting. In the mean time I will monitor everything closely, including the output frequency of the inverter to see for myself if it may have that function.

Currently backfeeding over 1500W into the batteries. Yes, this is going in through the Growatt inverters output wires. I have the input breaker off both on the inverter and in my main panel.