Archerite
New Member
Because of the price and small formfactor I have got a few Eco-Worthy 12V 8Ah LiFePO4 batteries from Amazon. Here is the listing on Amazon UK for the same battery since I got it in NL and all text is in dutch there.
I have a Victron BlueSmart 5A charger and it charges the battery just fine, except when it reaches the "fully charged" voltage of 14.5V it's current draw drops to zero! I have tried tweaking the settings but it happens no matter what! I have put four of them in parallel and matched the voltages as much as possible before putting them together. Even let them sit a few days after charging, and then using the ones that were "too high" for something to get it closer together.
That 4 battery bank works fine...but it has the same charging issue near the end. And the problem is that the smart shunt is not showing 100% yet at that time. At least 5-10% still remaining to be charged.
To upgrade my solar system from 2 7.2Ah SLA batteries to lithium I got two more of them. Matching them after full charge and a night resting and getting the voltages close together. Now this smaller bank of two is connected to a victron MPPT 75/15 and while charging works (given there is enough sun ofcourse) it has the same issue!
There is also another thing that puzzels me about the specs of this battery. They say in series you may connect up to 4 identical ones to get 48V and I get that. The BMS might have a voltage limit. But in parallel they say you may connect an unlimited number of batteries!! Before really thinking about it I ordered another 4 of them to upgrade the two in the solar array into a 6 battery 48Ah battery bank! Yeah, in the end that was more expensive but I like how small they are and it allowed flexibility in placing them. Also...I have two 60Ah victron super cycle batteries that are intended to be hooked to the MPPT instead...and then these can go in smaller "powerbanks" or something.
The batteries each have their own build-in BMS without an option to read it's status! It just does internal balancing and a bunch of other protections like: over or under-voltage, over-current, high temperature or short-circuiting. My guess is that the BMS kicks in for over voltage and stops charging, but the victron smart shunt is showing that not all Ah have been recharged! So I am a bit confused...am I charging the batteries the wrong way or is the shunt configured incorrectly?
I have tried finding a datasheet on the battery but could not find anything useful! Only for a close relative from eco-worthy but those have yellow labels and I have the blue ones!
Hopefully the mess above makes some sense, sorry. ?
I have a Victron BlueSmart 5A charger and it charges the battery just fine, except when it reaches the "fully charged" voltage of 14.5V it's current draw drops to zero! I have tried tweaking the settings but it happens no matter what! I have put four of them in parallel and matched the voltages as much as possible before putting them together. Even let them sit a few days after charging, and then using the ones that were "too high" for something to get it closer together.
That 4 battery bank works fine...but it has the same charging issue near the end. And the problem is that the smart shunt is not showing 100% yet at that time. At least 5-10% still remaining to be charged.
To upgrade my solar system from 2 7.2Ah SLA batteries to lithium I got two more of them. Matching them after full charge and a night resting and getting the voltages close together. Now this smaller bank of two is connected to a victron MPPT 75/15 and while charging works (given there is enough sun ofcourse) it has the same issue!
There is also another thing that puzzels me about the specs of this battery. They say in series you may connect up to 4 identical ones to get 48V and I get that. The BMS might have a voltage limit. But in parallel they say you may connect an unlimited number of batteries!! Before really thinking about it I ordered another 4 of them to upgrade the two in the solar array into a 6 battery 48Ah battery bank! Yeah, in the end that was more expensive but I like how small they are and it allowed flexibility in placing them. Also...I have two 60Ah victron super cycle batteries that are intended to be hooked to the MPPT instead...and then these can go in smaller "powerbanks" or something.
The batteries each have their own build-in BMS without an option to read it's status! It just does internal balancing and a bunch of other protections like: over or under-voltage, over-current, high temperature or short-circuiting. My guess is that the BMS kicks in for over voltage and stops charging, but the victron smart shunt is showing that not all Ah have been recharged! So I am a bit confused...am I charging the batteries the wrong way or is the shunt configured incorrectly?
I have tried finding a datasheet on the battery but could not find anything useful! Only for a close relative from eco-worthy but those have yellow labels and I have the blue ones!
Hopefully the mess above makes some sense, sorry. ?