FixAMess

This.........

Will it not balance the batteries, but not the cells? That is the point I was trying to make..

Maybe that was too short a time to balance the batteries more would have been better. All the pylontech batteries I have connected have had Over voltage issues which usually settle down after a few days/charge/discharge cycles.

Are you using self-define for the battery, I don't think the goodwe lists your battery in the selection menue? What settings are you using?

This is the responsible thing to do!

I updated 2000Plus and 3000C. I have the .bin file for 2000Plus, the 3000C is a bit more tricky, the upgrade versions are different, 2 available the last time I looked. Search on the forum for differences and related file. If you just want to connect the 2000Plus to 3000C, you only need to upgrade the 2000plus. I stacked 1x3000C, 4 x 2000 plus, 3x3000C. Let me know if you need the 2000plus .bin. and installer. Also remember you will need 2 different cables to connect to the console port on the battery, plus vs "C".

On the Sunsync 8kW inverter, what is the maximum battery charge current that can be drawn from grid? I see the specs mention a 40A input current, from grid, am I correct in saying this is also the max charge current from grid alone, no PV included?

If one looks at the above charge from grid settings, 17:00 -> 21:00 is set to charge from grid. Is this correct? I suggest all inverter owners try to supply their own power (battery) , where possible, at SA peak usage times I.e. 17:00 -> 21:00. Will this not aid the overall power issue we are experiencing now?

In my experience a minimum of 15kWh battery backup is required for the average SA home, taking LS, cloudy days, family requirements etc. into account. One can do with less, but then you have to act like a Nazi electrical usage guy.

I think there is a misunderstanding. Normally the DB is split into essential and non-essential. The inverter will feed both but is fed from 1 battery bank and the same solar panels. So the battery bank is not separated. Where are you based?

Are the heavy duty appliances on the essential side? The 10kW possible power is split scross the 3 phases but a max of e.g 6kW on any one phase. You need to find out what the max load on a single phase can be. On the sunsync 12kW inverter it's 6kW on a single phase, so the goodwe might be the same ratio i.e 5kW, which may be why it's tripping. Not very helpfull but a good starting point. I have a 5kW goodwe, it's essential output is 4600W, that's my kettle + mwave, add anything else snd it trips. Try your kettle, mwave and 1000w appliance together that should trip if your max per phase is 5kW.

Sorry, yrs, you are correct. I was not thinking!

I didn't mean disconnect the BMS, I meant disconnect from load/inverter to allow cells to equalize.

What BMS does the battery have? Ideally you should connect to the battery and see what's going on at the cell level. There are 2 levels of issues, a warning and a fault. Warnings are good cos the bms is telling the inverter there's an issue, so they are at least communicating. The bms is probably doing its job. A "fault" being issued is bad, a warning has been issued but the cell is still being charged. FYI, even my pylontechs have ov warnings, it takes them a few charge/discharge cycles to settle down. Discharge your battery down to 80% DoD(20% SOC), then disconnect it for 24hr, maybe the cells will equalize and then let it charge normally..See what it does. Repeat a few times...

Which model do you have?

Yes, engineer still required, the sunsync is grid-tied, irrespective of whether or not you feed back into the grid.

1 - yes 2 - yes 3 - Yes, but why? The grid is effectively a battery from which you can draw as required, when Sun + battery is not enough. 4 - Not sure, because at night your battery will also export its charge to grid if there is no solar. Youd need a switch to tell the inverter not to export at night??? 5 - Yes..

It's got to do with the power, Amps that your inveter can draw and the capability of the battery bms to provide. E.g your inverter can draw 100A, but battery only provide 50 A then you'd need a fuse for 70A. If you have 2x100Ah batteries and your inverter can draw 200A that then you'd need a 250A fuse. So you need to Match the inverter draw with what the battery can provide and add 25%.. A 5kW inverter can nominally draw 100A, so a 125A fuse will do. A 2 pole breaker , 1 for positive, 1 for negative will do.

So its a 24V, 800W inverter?

They have to upgrade 8 batteries and then add 4 type "C"....My usual solar electrician/troubleshooter, my wife,) is not keen.😆

I am getting quotes for the installation and upgrading of 4 pylontech batteries. I'm overseas at the moment so can't do it myself. I've got quotes ranging from R2k to R5k. What is the "going" rate? Installers, please advise what is reasonable.

Is there anybody who has the firmware update file for a US2000 Plus battery?

I would use 45kWh x 1.2 = 55kWh, allows one to take battery DoD to 80% only. Also people forget, irrespective of panels and inverter sizing, pv production follows a bell curve so one does not generate power at 10x550W from sunrise to sunset, and don't forget cloud, rain, hot weather as well.

@Narek, what problems are you experiencing? Maybe we can assist...

"Activate lithium battery, when the BMS of the lithium battery is protected, battery will not power inverter or the inverter cannot charge the battery." This setting is to charge a battery that has been discharged too deeply and is in protected mode. it's not for making 2 batteries discharge/ charge equally. Charge each batter to full indepenindely and then parallel them, maybe that will help.