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Thanks for all the info, i'll get the 150 :)

I thought this would be the case, thank you for the info

I am using comms so I am unsure how to actually get the settings being used by the Growatt. It is simply set to 'Program 52'

On balance would you say I should pony up the extra money for the 150V version? Even given the 0.5% margin here?

Hi, I am looking at adding a victron 100/30 to manage one of my strings. The VOC from my string would be 100.68V. Would that extra 0.68V fry or substantially shorten the lifespan of the controller? The 150V version is almost twice the price!

Do you have any info on using the victron in combination with a growatt ES and SOK 48V batteries?

Hi All, I am hitting the Amp limit on my Growatt 5000es so i have decided to move one of my 3 PV strings to its own charge controller. I plan to buy a Victron 150 | 30 mppt charge controller. My Growatt is using ethernet communication with my two SOK 48V server rack batteries. Program 52 if I...

Due to shading i cannot create a single string or split the strings

I take it I hook it up without any communication?

Followup question, if i got a second charge controller for one of the strings, can I hook it to my existing batteries that the growatt is communing with?

Thanks for the input, I figured as much. I have a combiner box so the strings don't interfere with each other too much, just wish I could get an extra 50V per string!

Hi All, I have ~6kw of panels in 3 strings wired in parallel going into my growatt 5000es. The total voltage of my panels is around 170V. I have noticed recently that i am hitting the 22A limit on the growatt and am therefore losing out on potential power. Wiring more panels in series to boost...

You mean charge all the way until the bms low voltage disconnect kicks in? Thanks for the advice!

You mean charge all the way until the bms low voltage disconnect kicks in? Thanks for the advice!

I’m referring to the FCC value displayed on the little screen on the unit under the analogue info -> cell capacity menu.

Yes I have set all these settings and I believe the batteries are now balanced. They certainly dont seem to be massively out of sync now. However my question remains: when/how will the SOK battery reset its FCC value?

How do I do things like ‘reduce the charge’? All I can do is let the solar charge the battery until it stops charging right?

Yes this is the battery I have (two of them). My question is, when will they reset their FCC? I’m pretty sure the new one with 15 cycles hasn’t really gone from 107ah to 91ah. As I said, the first time I charged using manual settings it charged to 110ah on the battery display but since then it...

Hi All, I have been having some issues using a pair of 48V 5kwh SOK batteries with my Growatt 5000es. The batteries were not balanced and so I removed all coms and ran the system with manual setting values for a few weeks. Things appear to have improved but I still have some issues. When the...

I did fully charge them and they have been fully charged several times since. It just appears that the SOC rapidly drifts apart if I start to discharge the inverter (at maybe 3kw). After an hour or so they can easily be 20% apart. How can i do this? I depend on the Growatt to charge the...

Hi All, I have a Growatt 5000ES which I have been running with a SOK 48V server rack battery (5kwh) quite happily for 6 months. I recently added a second identical SOK battery and i am now seeing some issues. The batteries are frequently not balanced and both charge and discharge at different...

I have set this up and my PV should get the batteries charged over the next few days. Couple of questions: Just so I understand, you’re suggesting I get both batteries charged to full then have PV hold them at 100% for a week? Would it speed up the process if I charge with AC to full then...

Disconnect comms between battery AND between inverter?

Hi All, I have a Growatt 5000ES which I have been running with a SOK 48V server rack battery (5kwh) quite happily for 6 months. I recently added a second identical SOK battery and i am now seeing some issues. The batteries seem to sync up and communicate ok. They charge and discharge together...

Hi, I have a 48V system with a Growatt 5000ES and a SOK 48V 100ah (5kwh) server rack battery. I have just purchased a second identical SOK battery. I know how to hook them up with CAT 5 cable and set the address etc but I was wondering about the state of charge differences between the two...

Interesting. So you’re saying I may be better going with 8S rather than 4S2P? My panels are half cut and they are next to each other so I can easily go with either config. I just assumed that a single shaded panel would drag all 8 down if in 8S. Why is that not the case?

So my question is: if I have 2 strings of 4 panels in series and run them into a combiner box, 4S2P, if one string becomes shaded (goes to around 2a) and the other gets full sunlight (10a), will this configuration allow the fully lit string to continue to provide full output without being...

Many apologies, I meant all the panels in series not in parallel.

I have 8 panels @ 40V and max 10A and during the day 4 of the panels are likely to become shaded but the other 4 should get full sunlight all day. Obviously if I parallel all 8 panels into a single string then the amps will drop for all panels when the shade hits. However if I split into 2...