sunshine_eggo
Happy Breffast!
Open her up!
Renogy Scum!!!!!
- Thread starter Urge38
- Start date
Open her up!
Texas-Mark
Solar Addict
- Joined
- Aug 4, 2021
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Balance the cells and use it.
seneysolar
Solar Addict
I think you might be obligated to change the title from "Renogy Scum" to "Renogy actually warrantied something!" 
Glad to hear they refunded you. This is a step in the right direction for them.
Glad to hear they refunded you. This is a step in the right direction for them.
ScropusGobbleBottom
Corn Pop was a bad dude.
YES this! And for the record, they RMA'd my battery after 1 year of use I think. It took some convincing but they did.I think you might be obligated to change the title from "Renogy Scum" to "Renogy actually warrantied something!"
Glad to hear they refunded you. This is a step in the right direction for them.
Well !!!!
Renogy insisted I gave them my PayPal details even though I had previously paid via my credit card.
I did mention this but I caved in as I wanted my refund.
Guess what???
PayPal charged me for the privilege off a refund.
Lost £8 in fees
Not the end off the world as I get to keep the battery and have had 4 months use out off it
Just happy to get most off my money back tbh
Renogy insisted I gave them my PayPal details even though I had previously paid via my credit card.
I did mention this but I caved in as I wanted my refund.
Guess what???
PayPal charged me for the privilege off a refund.
Lost £8 in fees
Not the end off the world as I get to keep the battery and have had 4 months use out off it
Just happy to get most off my money back tbh
mikefitz
Solar Wizard
- Joined
- May 28, 2020
- Messages
- 3,091
The issue is most likely due to the BMS, so the first step is to change that,
4S or 3S 12V Li ion or Lifepo4 Battery smart BMS with Bluetooth function UART and RS485 communication with 60A to 120A constant current - LLT POWER ELECTRONIC
1) Application:this smart BMS can work for 3 to 4S Lithium ion or Lifepo4 Battery ,client can choose based on your battery chemistry features 2) Current : constant current of this version BMS can be made with 40A to 120A in accoridng to the different demand 3) Dimension: :Max 138*102*15mm for...
www.lithiumbatterypcb.com
Once replaced and operational you will see battery status via the app, Overkill Solar App.
You could cycle the battery and see if things improve. Try this for a few weeks.
To manually balance either charge up the low cell, use a suitable charger with great care not to exceed 3.6volts.
A safer, and less likely to damage by overcharging a cell, is to have the battery on charge and as it nears full, the cell voltages will start to diverge. By monitoring the cell volts via the BMS, identify the high cell and apply a DC load across the cell for several seconds. ( a 12v car headlamp bulb is a suitable load).
The cell volts will drop. Increase or reduce the load contact time as needed.
The 'high' cell will change from cell to cell, 'wack the mole , discharging the high cell. When all cells are above 3.4 volts with less than 50 mV differential, consider task completed.
The issue is most likely due to the BMS, so the first step is to change that,
Select the fast delivery option for 7 day UK delivery. ( company take Paypal)4S or 3S 12V Li ion or Lifepo4 Battery smart BMS with Bluetooth function UART and RS485 communication with 60A to 120A constant current - LLT POWER ELECTRONIC
1) Application:this smart BMS can work for 3 to 4S Lithium ion or Lifepo4 Battery ,client can choose based on your battery chemistry features 2) Current : constant current of this version BMS can be made with 40A to 120A in accoridng to the different demand 3) Dimension: :Max 138*102*15mm for...
Once replaced and operational you will see battery status via the app, Overkill Solar App.
You could cycle the battery and see if things improve. Try this for a few weeks.
To manually balance either charge up the low cell, use a suitable charger with great care not to exceed 3.6volts.
A safer, and less likely to damage by overcharging a cell, is to have the battery on charge and as it nears full, the cell voltages will start to diverge. By monitoring the cell volts via the BMS, identify the high cell and apply a DC load across the cell for several seconds. ( a 12v car headlamp bulb is a suitable load).
The cell volts will drop. Increase or reduce the load contact time as needed.
The 'high' cell will change from cell to cell, 'wack the mole , discharging the high cell. When all cells are above 3.4 volts with less than 50 mV differential, consider task completed.
I think the batteries are lots of cylindrical cells
go to page one of this thread and watch the youtube video, you can easily skip to the part where the battery is open to see what I mean
mikefitz
Solar Wizard
- Joined
- May 28, 2020
- Messages
- 3,091
I assumed the battery used four prismatic cells. Renogy have other variants, cylindrical and pouch cells. In this case multiple small capacity cells will be connected in groups as four 'big' cells.
The manual self balance still can be performed and a 4s BMS fitted.
It's remotly possible that one of the cylindrical or pouch cells in the group has failed, not much you can do other than replace.
Last edited:
Whinny
Solar Enthusiast
- Joined
- Dec 24, 2020
- Messages
- 407
ScropusGobbleBottom
Corn Pop was a bad dude.
Its Renogy, I would consider this greater than "remotely possible"
A bit off a side step
But can I ask you guys is it worth buying a Eco worth 100ah battery ????
Ive seen a stonking deal for one @ £175 inc delivery??? (100ah not my 50ah Renogy size)
dont want to fall into the same trap as the Renogy, but at least with the Eco worthy, it uses four block EV type cells
But can I ask you guys is it worth buying a Eco worth 100ah battery ????
Ive seen a stonking deal for one @ £175 inc delivery??? (100ah not my 50ah Renogy size)
dont want to fall into the same trap as the Renogy, but at least with the Eco worthy, it uses four block EV type cells
mikefitz
Solar Wizard
- Joined
- May 28, 2020
- Messages
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Don't think you get low temperature protection.
Eco Worthy may have a similar support system as Renogy
What was the cell delta before the JBD fixed it? .150v or higher?
Whinny
Solar Enthusiast
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- Dec 24, 2020
- Messages
- 407
I don't remember the delta, but it was considerable, more than 150. The BMS shut down during charging at 13.7 volts. I did balance it a bit with an 1157 bulb before connecting the JBD. I had to change the harness to reach the new BMS, but the 2 negative leads are original.
SpongeboB Sinewave
Solar Enthusiast
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