NewStats: 3,259,347 , 8,169,865 topics. Date: Saturday, 24 May 2025 at 06:29 PM 2q4s1y

fuckboys:
someone is saying my s are too much for 12v. Is that even possible?

Yeah. To be frank you should have gone with 180Watts or 200watts s that are originally for 12v system. Just parallel them and set that ampere to the required charge current in your controller.

Try using your PWM to wake it up, if it’s still available.

fuckboys:
someone is saying my s are too much for 12v. Is that even possible?

Lolz, there's a reason its quoted in the manual the PV
voltage limit for the different battery voltages

BigDickProblems:


Yeah. To be frank you should have gone with 180Watts or 200watts s that are originally for 12v system. Just parallel them and set that ampere to the required charge current in your controller.

Try using your PWM to wake it up, if it’s still available.

This isn't the ideal if using an mppt. Higher voltage means more efficiency in performance and cost in lesser guage wires

Drgreatone:

This isn't the ideal if using an mppt. Higher voltage means more efficiency in performance and cost in lesser guage wires

And look at what the high voltage has caused. He could have gotten 12volts and the appropriate cable for the set charging current.

BigDickProblems:


And look at what the high voltage has caused. He could have gotten 12volts and the appropriate cable for the set charging current.

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

fuckboys:
I did multiple times and it will restart and disconnect charging again.

When I had issue like this,the problem was from the bms.so I loaded the battery overnight, then started charging again the next day.

Maybe u can try this out

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

@fuckboys follow his recommendations and try to check specified maximum pv array for ur system from the cc manual. I think here lies the solution to ur problems before things start getting fried

fuckboys:
no my battery didn't even charge at all today with all the sunlight.

I had about 700plus watts around 11am then it kept increasing and crossed 800w before the c. Disconnects and won't charge again.

Please who has experienced this.?

what type of cc are u using. Do mind ing a pic. State ur pv wattage, qty n mode of connection ( series/parallel)

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

Ok. I get it now, he maxed out his recommended voltage. I am here to learn. Just a little of my experience so far is what I’m sharing.

fuckboys:
I did multiple times and it will restart and disconnect charging again.

Are you sure you're not being limited by your battery?

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

Fuckboys have not provided sufficient information and context to enable you guys advise him.

Controller has been in use since February on a locally assembled LiFePO4 battery. Recently, he upgraded only his battery to an Haisic 12v 314ah LiFePO4 battery and he has now encountered this issue.

My suspicion is that the BMS is probably the issue here

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

Regarding the emboldened; did you want to refer to VoC limit of the controller, considering the battery voltage (12v)?

If yes, then I doubt that is the issue here because the VoC of each of his s is less than 40v and he is on a 2s2p connection, keeping the VoC of the s less than 80v, the recommended VoC for a 12v system

BigDickProblems:


That 50+ Volts on your controller dashboard, I hope that’s not the charging voltage ?

Nop that's not the charging voltage, is the voltage.

brightk:
what type of cc are u using. Do mind ing a pic. State ur pv wattage, qty n mode of connection ( series/parallel)

powmr 60a

4 420 cworth s connected in 2parallel series 2parallel with is voc 31.6v

BigDickProblems:


Ok. I get it now, he maxed out his recommended voltage. I am here to learn. Just a little of my experience so far is what I’m sharing.

no my all 4 s was connected in a way not to max out the cc voltage, I was still under 70v and max on 12v on the cc is 80v.

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

no, I was still under the recommended voltage of the cc for 12v system.


Total voltage was around 64v

4pcs of cworth s connected in 2p s 2p

Each pv has a max voltage of 31.6v

BigDickProblems:


Yeah. To be frank you should have gone with 180Watts or 200watts s that are originally for 12v system. Just parallel them and set that ampere to the required charge current in your controller.

Try using your PWM to wake it up, if it’s still available.

with an mppt cc it doesn't really matter. So long you're under the recommended voltage of the cc

okikigsm:


When I had issue like this,the problem was from the bms.so I loaded the battery overnight, then started charging again the next day.

Maybe u can try this out

maybe I'll try this. Thanks.

HeavenlyBang:


Are you sure you're not being limited by your battery?

just tire, how can I ascertain this? Battery still dey under warranty o.

Valto:
....active

What is the continues watts of the 4k and 3k watts satchet inverter.? And there prices am surely coming for 1 .

And one other thing cos I don’t know if this is important, my inverter can’t charge this battery cos it’s showing MCB main trip

fuckboys:
with an mppt cc it doesn't really matter. So long you're under the recommended voltage of the cc

So what could have caused this issue since you are under the recommended voltage??

I guess I’m still asking the same question as you 🥲

fuckboys:
And one other thing cos I don’t know if this is important, my inverter can’t charge this battery cos it’s showing MCB main trip

Then you know your problem already. It's battery issue.
Try loading it this night as something here suggested.

Deye na better Soup oo..

Efficiency 97% DC to AC conversion stop wasting unnecessary power in conversion. Even 5kwh batteries will last very well.

1750/1800

If you have 5kwh batteries, this will mean you can use 4850wh on the AC side compared to most inverter with 87%, which gives on 4350wh.. a whole 500wh saved..

fuckboys:
powmr 60a

4 420 cworth s connected in 2parallel series 2parallel with is voc 31.6v

I didn't read your whole story, but your installed capacity is way above the CC recommended Watt for a 12V system. You can try 3 s in parallel and see what that maximum Total Watt would be, if it exceed say 700W then stick to 2 s

fuckboys:
no my all 4 s was connected in a way not to max out the cc voltage, I was still under 70v and max on 12v on the cc is 80v.

What's the charging current from the CC?

pheleix:


What's the charging current from the CC?

around 50+amps

pheleix:


I didn't read your whole story, but your installed capacity is way above the CC recommended Watt for a 12V system. You can try 3 s in parallel and see what that maximum Total Watt would be, if it exceed say 700W then stick to 2 s

my installer has climbed that roof several times and my landlord isn't happy with it anymore, I want to be able to solve this issue without going to rearrange the s again.

I stay in a rented apartment.

fuckboys:
no my battery didn't even charge at all today with all the sunlight.

I had about 700plus watts around 11am then it kept increasing and crossed 800w before the c. Disconnects and won't charge again.

Please who has experienced this.?

I think your voltage is above the maximum rated for your inverter voltage. Is your PV Voc above 80v?

pheleix:


I didn't read your whole story, but your installed capacity is way above the CC recommended Watt for a 12V system. You can try 3 s in parallel and see what that maximum Total Watt would be, if it exceed say 700W then stick to 2 s

This is not how MPPT capacity sizing works... You can over your controller so long as you don't go over recommended voltage and amps.

fuckboys:
around 50+amps

I have noticed, in my own setup that once current enters the 50's with this controller, the controller gets very hot and enters into over temp shutdown. I have had to add an external cooling fan to help the situation.

Note, my setup is outside, so ambient temp gets quite high.

fuckboys:
no my battery didn't even charge at all today with all the sunlight.

I had about 700plus watts around 11am then it kept increasing and crossed 800w before the c. Disconnects and won't charge again.

Please who has experienced this.?

Ur s are too much for the CC to handle