MisterSandals
Participation Medalist
I am not near my computer to double check but that looks like it will need 4/0 wiring and high quality (UL !!!) lugs.
finally bought solar
- Thread starter ddaky
- Start date
no im in croatia eu
so 12mm thick wire if i understand this correctly
MisterSandals
Participation Medalist
AWG - American Wire Gauge Current Ratings
Amp ratings vs. US AWG wire gauges.
www.engineeringtoolbox.com
This says 4/0 good to 325A for single core. Hopefully plenty for your stranded wire.
Maybe someone with expertise in this can chime in?
So
There is a BMS on the battery but there is no communication protocol, so the BMS cannot be used
kind regards
Is this a problem...i have jk bms ordered
So i just found out thisAWG - American Wire Gauge Current Ratings
Amp ratings vs. US AWG wire gauges.
This says 4/0 good to 325A for single core. Hopefully plenty for your stranded wire.
Maybe someone with expertise in this can chime in?
There is a BMS on the battery but there is no communication protocol, so the BMS cannot be used
kind regards
Is this a problem...i have jk bms ordered
MisterSandals
Participation Medalist
What battery?
Why do you suspect the BMS cannot be used?
Can the battery be opened so the BMS can be replaced?
Where in Croatia? Its a lovely country with very friendly people.
So
There is a BMS on the battery but there is no communication protocol, so the BMS cannot be used
kind regards
Is this a problem...i have jk bms ordered
What to do now...my inverter is in post office waiting to be picked up...what about rs485 protocol?
A city Slavonski Brod far cca 400km from the sea but beautiful country side
So i just found out thisAWG - American Wire Gauge Current Ratings
Amp ratings vs. US AWG wire gauges.
This says 4/0 good to 325A for single core. Hopefully plenty for your stranded wire.
Maybe someone with expertise in this can chime in?
There is a BMS on the battery but there is no communication protocol, so the BMS cannot be used
kind regards
Is this a problem...i have jk bms ordered
I got that response from seller...
What to do now...my inverter is in post office waiting to be picked up...what about rs485 protocol?
A city Slavonski Brod far cca 400km from the sea but beautiful country side
rodrick
Free energy enthusiast
Is this a cell kit that you are putting together or is this a pre made battery if it’s a pre made just hook it up and set the aio settings for the batterys manufacturers recommendation
if you have problems with the charging the bms stops the charge drop the top voltage down some till that doesn’t happen and then slowly increase the voltage over time the battery will eventually balance out if it’s a good battery
if you have problems with the charging the bms stops the charge drop the top voltage down some till that doesn’t happen and then slowly increase the voltage over time the battery will eventually balance out if it’s a good battery
MisterSandals
Participation Medalist
The best you can do is charge it up as slow as possible so the cells absorb as evenly as possible. When your cell voltage start to diverge and one gets close to 3.65V, stop charging. You then discharge this higher voltage cell. You can leave it hooked up in series. Use an incandescent light bulb like 100W or larger. It will not light but should get warm and lower cell voltage eventually.
Then start charging battery until a cell gets to 3.65V and repeat discharge of that cell.
Keep doing this until all the cells are over 3.6V and cannot stand doing this anymore.
are you talking about charging in series with inverter or in parallel with different charger?
rodrick
Free energy enthusiast
U can leave them in series and just bleed the higher cells down with the light bulb plus the bms will help balance over time also
So i make 8s battery connect bms and connect to hybrid Inverter and charge the battery normal?im new to all of this sorry for stupid questions but i just want to be shure
Bok ddaky, dobrodošao na forum.
Stvarno je lijepo vidjeti nekoga tko je također iz Hrvatske ovdje. Malo nas je al nas ima!
Molim te, nemoj zamjerati ali pitam ovo s razlogom, jesi li i prije gradio solarni sistem ili si novi u svemu ovome?
LP
D.
rodrick
Free energy enthusiast
Yes you can do you have a dmm that you can check individual cells with to see how close they are you may want to hook them up in parallel for a day or 2 to let them all balance to each other then build the battery and start charging slowly and help balance with the light bulb
Bok ?takoder ajd bar netko nas da se nade...potpuno sam novi u svemu ovome zato i postavljam tolika pitanja ?? taman sam dobio baterije pa kemijam kako i sta s njima najbolje da ih nebi zeznuo...jel imas ti iskustva u svemu ovomeBok ddaky, dobrodošao na forum.
Stvarno je lijepo vidjeti nekoga tko je također iz Hrvatske ovdje. Malo nas je al nas ima!
Molim te, nemoj zamjerati ali pitam ovo s razlogom, jesi li i prije gradio solarni sistem ili si novi u svemu ovome?
LP
D.
Ok thanks...i will do it like that slow charge than check which is faster in charging than discharge a little that cell and like that i circle
MisterSandals
Participation Medalist
If your only charger is a 12V or 24V charger, then yes, in series.
The best option would be for a 3.65V bench top charger. I have a hobby battery charger that i use. If you know anybody with RC cars or drones, they probably have something that would work.
Definitivno pitaj što više pitanja za sve što te zanima ili ne razumiješ. Sa vremenom ćeš steći dovoljno znanja te ćeš početi kontati kako je to sve povezano i matematika koja stoji iza toga. Sa malo truda i upornosti, bit ćeš profesionalac u tren oka.
Iskreno, imam nekog skromnog iskustva u gradnji malog solarnog sustava, pa ću ti pokušati pomoći koliko mogu s onim što sam naučio do sada.
Onako čisto kao okvirni savjeti koji bi ti mogli pomoći lakše shvatiti kako što funkcionira i slično, pa nakon toga će ti možda biti lakše vidjeti u kojem smjeru želiš ići.
Također, molim te nemoj zamjeriti ali iz respekta prema ovom forum kao i drugim ljudim ovdje pisat ću na engleskom jeziku.
Samim time da informacije koje se dijele ovdje s ciljem da ti se pomogne budu dostupne i svima ovdje i na jeziku koji većina ljudi razumije u svijetu.
Ukoliko ti bilo koji dio nije u cijelosti jasan, samo reci i napišem na našem jeziku. Bez problema
Btw, If you haven't already, it might be a great idea to watch videos on 'how to build a DIY LiFePo4 battery' on YT. There are a lot of great channels and videos on this topic. This should give you a good idea of how to go about this.
Here are a few, but there are plenty of such channels/videos on YT. Worth watching!
Also, in addition to using this forum, there are a lot of groups on FB related to DIY solar and/or batteries. There's also a Croatian one called 'Solarni klub' where you can find out a lot of information related to grid-tie, the law, and compliance with the electrical code in Croatia.
Personally, I do not have any experience with the grid-tie system, the Croatian solar group should be helpful on that part.
Yet, I would advise that before spending a lot of money on huge and very expensive cables and so on, you are absolutely certain how many batteries are you planning to invest in. Do you have any plans to ever upgrade the storage to a more significant capacity?
Take your time, and try not to rush things.
Ask questions, ask a lot of questions! Also, take your time to process all the information.
There are a lot of really great guys here on the forum willing to help out with these things.
Best,
D.
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