joepolcari
New Member
- Joined
- Mar 5, 2021
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For testing see you tube - LiFePo batteries are practically indestructible.
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Cool! (Pun intended)For testing see you tube - LiFePo batteries are practically indestructible.
Me tooWatching this intensely as I am very interested in this battery. It'll fit perfect on the tongue of my trailer in a dual GC2 box. All other 200ah are too big.
Any update on this 300 Ah Lossigy battery?I have a 300 Ah version of this battery arriving tonight! I will charge it up and let everyone know how that goes.
For a 4S LiFePO4 battery, 10 volts is fully discharged and 14.6 volts is fully charged. Anything much above or below those voltages is asking for trouble.I’m still a newbie, but I thought LiFePO4 batteries could get discharged almost fully and was a big part of why people choose them? (That said, it may reduce the number of cycles available overall, especially if done on a regular basis.)
I can't explain why the charge was not linear. But the BMS cutting off at 14.2 volts is a little low for a BMS HVD. Was that the voltage measured at the battery terminals? Does Lossigy claim the BMS balances the cells? This is from their sales page:During the charge
There was most likely not any damage to the cells. Does your volt meter measure to more decimal places? In other words did the LVD kick in at exactly 9.8 volts? And how accurate is your volt meter? Also there will be some voltage drop between the BMS's output and the voltage measured at the cells terminals. So the voltage measured at the cells terminals would be a bit higher than the voltage measured at the battery terminals.During the discharge
thanks,I can't explain why the charge was not linear. But the BMS cutting off at 14.2 volts is a little low for a BMS HVD. Was that the voltage measured at the battery terminals? Does Lossigy claim the BMS balances the cells? This is from their sales page:
Charging
Charging voltage: 14.4-14.6V
Overvoltage disconnect voltage: 15V
Overvoltage reconnection voltage: 14.2V
Discharge
Low voltage disconnection voltage: 10.8V
Low voltage reconnection voltage: 10.6V
Undervoltage warning voltage: 12.4V
There was most likely not any damage to the cells. Does your volt meter measure to more decimal places? In other words did the LVD kick in at exactly 9.8 volts? And how accurate is your volt meter? Also there will be some voltage drop between the BMS's output and the voltage measured at the cells terminals. So the voltage measured at the cells terminals would be a bit higher than the voltage measured at the battery terminals.
It would help if they disclosed the BMS they are using although most manufacturers don't. It would be nice if the BMS had bluetooth.
Most if us keep the cells between the knees to increase cycle life and to keep the delta of the cells low. One should not rely on the BMS for LVD and HVD although it's good to test the BMS to make sure it's working properly as you did The BMS is supposed to be used as the last line of defense in case a device fails in the system.
The fact the battery tested at full capacity and the BMS is working is good. IMO you received a good battery at a good price. Sorry I can't halp with data logging.
What trailer do you have? That tongue box fit perfect. I have an Alpha Wolf 26dbh-l.bought 2 lossigy 200ah 12 v batteries April 2021. Made a 12 v, 5.1 kWh battery bank with them for my Rv trailer, using a 200w renogy solar suitcase, Victron 100/30 mppt. They have worked great for me on many camping trips. Have not experienced any problem in charging by solar or AC both chargers Victron. All components fit in a tongue box from harbor freight.
2021 25bh wildernessWhat trailer do you have? That tongue box fit perfect. I have an Alpha Wolf 26dbh-l.
I had to remove the latch on the front of the box to get both batteries in. Just 4 rivets then riveted it back in.2021 25bh wilderness