Kenny_
Solar Wizard
Using the PBMSTools (either basic or SOK) you can view all the individual cell voltages and grab a screenshot.
Install and Operation of the SUNGOLD 10KW 48V SPLIT PHASE SOLAR INVERTER
- Thread starter Kenny_
- Start date
Kenny_
Solar Wizard
Kenny_
Solar Wizard
Random thought....what if the inverter is broken and only supplying 53 V or not enough voltage to raise the batteries over 53 V ??
How would I even test/check that?
How would I even test/check that?
marionw
Solar Addict
After bulk charge the inverter "should" float charge the batteries at #11 volts as set by the BMS and as long as the BMS is requesting charge current #7.
For me #9 and #11 are 56.4 volts
Also menu item #7 Battery charging current is also set by the BMS. Disconnect the BMS and this should revert to the default of 60.
This is also displayed is SA as "Max charge current" and updates as the BMS continues to modify it.
Max PV charge current is hard coded in the firmware, I can't find a user settable menu item.
Max grid charge current is menu item #28
For me #9 and #11 are 56.4 volts
Also menu item #7 Battery charging current is also set by the BMS. Disconnect the BMS and this should revert to the default of 60.
This is also displayed is SA as "Max charge current" and updates as the BMS continues to modify it.
Max PV charge current is hard coded in the firmware, I can't find a user settable menu item.
Max grid charge current is menu item #28
marionw
Solar Addict
The output of the inverter can be measured with a multimeter at the battery cable connections in the inverter.
You should also measure the voltage at the battery
You should also measure the voltage at the battery
Kenny_
Solar Wizard
With the inverter disconnected from batteries, right?
Not sure it will even attempt to charge if disconnected from batteries
Quattrohead
Solar Wizard
No do not disconnect the batteries at all. Measure the battery voltage at the inverter connector and also measure it on your battery bus bar somewhere just to make sure you're not dropping voltage between the two
Kenny_
Solar Wizard
Okay.... But then it's just the same as I'm seeing in the inverter screen or Doala assistant and what I'm seeing in pbmstools which is 53.1....
Quattrohead
Solar Wizard
Honestly Kenny I'm sure you're doing your own head in as well as us LOL you have a weak cell in battery number 5 and either because of that or some other minor difference your battery number five acts a little differently. You either need to put it in user mode and forget about it or keep the comms running and forget about it. Whichever, go live your life away from this thing for a while. ?
Quattrohead
Solar Wizard
Good at least you know your connections are all perfect.
Kenny_
Solar Wizard
Yeah....maybe so....????
Kenny_
Solar Wizard
Yes just did this and all the same meter says 53.2 at inverter and batteries and measuring at each of the batteries and diagonal opposite the inverter supply/feed cables.
Kenny_
Solar Wizard
Sorry. Certainly not meaning to bother anyone, but this is just making me crazy when people are saying 54.4/pack and 3.4/cell is 'Full' and mine are no where near that .... 53.1/pack and 3316 mv/cell max/full.
I was concerned about battery #5 a while ago and it is acting differently (maybe it's effecting the others) but now my concern is bigger as above with none of the packs charging above 53.1
I'm going WTAF?
P.S. I'll try to stop posting so much though... just looking for help or confirmation from those with this same inverter and/or batteries and thus far it seems mine in not acting 'normally.' ----now looks like pack2 is inching up slightly to 3.321 / cell
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42OhmsPA
What's in a title?
...
don’t change your ways! I’m sure he was just being facetious
Kenny_
Solar Wizard
Why so low on 5, 9,11?
marionw
Solar Addict
What does SA show for "Max charge current" and what is menu Item #7 reading?
This is the current the BMS is telling the inverter to charge with. I assume the inverter will lower it's charging voltage so this current (as requested by the BMS) is not exceeded.
If you disconnect the BMS (for a test) #7 should go to the default of 60 amps, SA should then show 60 for Max charge current and the inverter charging voltage hopefully goes up and you see an increase in charging current as read by the SOKTools software
This is the current the BMS is telling the inverter to charge with. I assume the inverter will lower it's charging voltage so this current (as requested by the BMS) is not exceeded.
If you disconnect the BMS (for a test) #7 should go to the default of 60 amps, SA should then show 60 for Max charge current and the inverter charging voltage hopefully goes up and you see an increase in charging current as read by the SOKTools software
42OhmsPA
What's in a title?
05 - switch back to battery sooner to minimize grid usage.
09 - 55.2V / 16 gets you to 3.45V / cell, full after sitting at this voltage (setting 10)
11 - 54.8V / 16 gets you 3.425V / cell, enough to balance (if you lower your balance start voltage in the BMS like I suggested a few posts / pages back. Post in thread 'Install and Operation of the SUNGOLD 10KW 48V SPLIT PHASE SOLAR INVERTER' https://diysolarforum.com/threads/i...-split-phase-solar-inverter.71345/post-977642)
Edit to add 05 will not take affect if you are using utility first priority.
CaliSunHarvester
Solar Enthusiast
Have you tried to remove the problem battery from your system and charge it offline with a 48V lifepo4 charger like this?
Quattrohead
Solar Wizard
More like trying to stop him worrying so much about it, you know it's not top notch components and it's not going to behave like it. There's been tons of great information here. I think Kenny needs to stop, use 420' settings and start with a clean slate and not worry about it as much.
Nothing running in parallel will share the work equally, absolutely nothing, not engines, not batteries, not humans, nothing.
Quattrohead
Solar Wizard
I'm actually loving that three or four of you are delving into these so hard for everyone's future reference, it is great.
Kenny_
Solar Wizard
Interesting.... 5 make sense that way...would be my preference as well.
on mine the BMS set value for 9 and 11 is 56.4 significantly more but others are saying theirs is set to 57.6 for 9 and 11
as far as balance threshold I'm never getting anywhere near 3.4/cell ?? right now max on all 5 packs is 3.321 .... maybe I don't understand what this does but if the cells never reach that voltage then is doesn't matter anyway, right?
Thanks!
Partimewages
Solar Addict
Off the wall question. How accurate and how many digits is your meter? With lifepo4 milli volts are a concern.
Tier 1 inverters generally have a setting for off set voltage between the inverters and the battery terminal.
Tier 1 inverters generally have a setting for off set voltage between the inverters and the battery terminal.
Kenny_
Solar Wizard
I'm very close to going to grid and dumping this whole mess.
Oh Wait I meant very close to going to the User thing and see what happens....Either that or do a full factory reset and attach only one or two batteries and see what happens (def without battery 5)
at the moment still waiting on battery 5 to get up there (and we're still charging but may run into that 240 minute limit real soon now.. bat 5 is at 93% SOC cells at 3.315 - 3.313..
still charging though at aggregate of 99% SOC
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Kenny_
Solar Wizard
Are you talking about at the Cell level or the Pack/Battery level? I'm using a cheap Craftsman digital meter... only .1 accuracy that I'm seeing on the 200 VDC range.
I think my inverter is Tier Garbage!
Shoulda gone with the big boys.
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