32 minutes ago, Antonio de Sa said:

In my case the trip happens when BMS is connected to the battery, I have two 5000 KW inverters ES Hight voltage = 10 Kw.

I see you use grid power to supplement your load, I don't want to do that, I set parameter 14 at OSO ( only solar charges my battery ) 

I strongly think that the BMS tries to add power from the grid to the PV power to charge the battery. and that I definitely do not want.

They can easily handle my 3 KW geyser, mind you I only switch the geyser on at about 11 o'clock, by then PV is at maximum and battery almost fully charged.

Within 1 and half hour the geyser is hot and thermostat switches the geyser off

Also it can handle the stove late in the afternoon for cooking.

After about 7 pm my house consumption is very low, drops to about 700 wats. 

When I see that the battery SOC is at about 35%, I flip the inverter over to Eskom power other wise it completely discharges the battery overnight as the inverters no load consumption is quite high = 1.8 amps.

I switch back to solar early in the morning at +_ 7:00 AM.

I presume in winter will be a different case, I will cross that bridge when we get there.

What software do you use on your mobile ? I'm afraid to connect to Growatt server.

 

 

 

I can without any doubt tell you that the inverter cannot do the part in bold. It was one of the main reasons I bought mine. This inverter does not have the ability to feed into the grid. I even checked recently if I could make my meter spin backwards.

If it did they would charge more for it.

Edited September 30, 20214 yr by Buyeye

4 minutes ago, Buyeye said:

I can without any doubt tell you that the inverter cannot do the part in bold. It was one of the main reasons I bought mine. This inverter does not have the ability to feed into the grid. I even checked recently if I could make my meter spin backwards.

If it did they would charge more for it.

I did not mean feeding power to the grid, the inverter cannot do that, it's not a hybrid type. What I mean is that it tries to get power from Eskom to supplement, add to whatever my PV system is generating to charge the battery.  

10 minutes ago, Antonio de Sa said:

I did not mean feeding power to the grid, the inverter cannot do that, it's not a hybrid type. What I mean is that it tries to get power from Eskom to supplement, add to whatever my PV system is generating to charge the battery.  

Then I believe the document you should be reading is the battery manual, mine clearly says that the bms will override any settings on the inverter to protect the battery. 

14 minutes ago, Buyeye said:

Then I believe the document you should be reading is the battery manual, mine clearly says that the bms will override any settings on the inverter to protect the battery. 

Yes, I think that is the case, even though I have parameter 14 set at OSO = Solar energy will be the only charger source no matter utility is available or not.

Looks like BMS overrides parameter 14 setting  and try to charge battery from mains.

I just have to run the system without BMS.

Thanks for all the impute.

 

I recall you asking if you should wire the inverter input before or after the EL. Just curious- is it before or after the EL?

15 hours ago, JoeyhZA said:

I recall you asking if you should wire the inverter input before or after the EL. Just curious- is it before or after the EL?

Yes, it's done.