willful simplicity
New Member
My 12.8 100ah batteries do not have bms installed. Should I go with the external BMS or a battery to set protection limits, charge and discharge?
External BMS or a battery protector?
- Thread starter willful simplicity
- Start date
BentleyJ
Solar Wizard
If you have Li type batteries of any kind, an internal BMS that monitors individual cell voltages as well as battery current and temperature is not optional, its a necessity not only for proper performance and longevity but more importantly safety.
DIYrich
Solar Wizard
Can you attach a bms to the individual cells?
willful simplicity
New Member
I have EPCOM Lifepo 4 batteries 12.8 volts 100ah. I inquired to the company and they said there was no internal bms. I have read that it is mandated that all lifepo4 batteries (lithium) had to have bms.
No I can't get to the individual cells.
No I can't get to the individual cells.
DIYrich
Solar Wizard
I assume you are putting 4 in series to get 48v. I suppose a bms to keep 4 12v batteries in balance is better than nothing. Don't know anything about bms that balances 12v batteries.
willful simplicity
New Member
I have 4 batteries in series/parallel for a 24v system
DIYrich
Solar Wizard
Best wishes without a bms. I would keep max charge voltage under 27.0v, just to be safe, and cutoff above 24.0v.
willful simplicity
New Member
Do you know anything about battery protectors?
DIYrich
Solar Wizard
Brett V
Mad Scientist
If this is what you bought, no you probably don’t need another BMS but I couldn’t find anything specifically stating you can place them in series. It says they’re only good for 20 amps discharge so even with two in parallel, I hope you don’t plan on any moderate loads. 
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willful simplicity
New Member
Is there anything you can tell me about a battery balancer with a smart shunt for low voltage and over charge protection?
mikefitz
Solar Wizard
- Joined
- May 28, 2020
- Messages
- 3,076
The specification suggests a BMS is installed in the battery. I cannot see that a company would sell a lithium battery without a BMS.12.8 100ah batteries do not have bms installed
Example of battery balancer,
ZZP Solar 24V Voltage Battery Balancer Equalizer AGM Lead Acid Lithium | eBay
ZZP Solar Battery Balancer Equalizer.
www.ebay.com
Victron Battery Balancer for 24V System - BBA000100100 | eBay
Battery Balancer. If needed, several balancers can be paralleled. A 48V battery bank can be balanced with three Battery Balancers. We may utilize signature required. Reloading Supplies. Hunting Gear.
www.ebay.com
Victron Smart Bluetooth Battery Monitor BMV-712 Black/Grey shunt (BAM030712000R) | eBay
Victron BMV-712 With Bluetooth built-in, the BMV Smart is ready for the Internet of Things (IoT) era. (Free programming guide attached in the download section). Download the Victron Bluetooth app.
www.ebay.com
Victron Energy Smart BatteryProtect 12/24-Volt 100 amp (Bluetooth) | eBay
The on/off input can be used as a system on/off switch. Bluetooth: programming made easy When using Bluetooth to program the Smart BatteryProtect any required engage/disengage levels can be set. Alternatively, one of nine predefined engage/disengage levels can be set with the programming pin...
www.ebay.com
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