Wattsup
Member
- Joined
- Feb 19, 2017
- Messages
- 512
Ok, I have another question, or thought for you all.This is me thinking out loud really
Since I got my LiFePO4 cells I've been busy researching the chemistry while running my 12 volt system.
There is not a massive amount of info out there and a lot of it can be conflicting I've found.
The main focus of discussion around them is over charge/ discharging and balancing cells.
My experience has been my cells are all really well balanced, even at higher and lower voltages but there are a couple of cells that discharge to a lower voltage than the rest.
The other thing is that unlike Li Ion you can't rely on voltage for true indication of state of charge. The cells may be reading 3.45 volts per cell under charge, then take away the solar and they will soon settle to around 3.30v.
These are thereasons I have purchased abms.
The next issue is finding a charge controller with suitable charging profile for LiFe chemistry. Some say it's as easy as restricting voltage to around 3.65v per cell and all is good...But is it?
This brings me to my question...I have only found a fewthat some say are suitable and a couple that are supposed to be designed around these batteries, one being the Australian designed GSL electronics GSL MPPT60-1L. Does anyone have any experience with these?
The other option I've been considering is either the Eltek flatpack 2. Or the Elcon TC48v charger both of which I think can be controlled by the batrium system.
Would be great to hear your thoughts
Cheers
Since I got my LiFePO4 cells I've been busy researching the chemistry while running my 12 volt system.
There is not a massive amount of info out there and a lot of it can be conflicting I've found.
The main focus of discussion around them is over charge/ discharging and balancing cells.
My experience has been my cells are all really well balanced, even at higher and lower voltages but there are a couple of cells that discharge to a lower voltage than the rest.
The other thing is that unlike Li Ion you can't rely on voltage for true indication of state of charge. The cells may be reading 3.45 volts per cell under charge, then take away the solar and they will soon settle to around 3.30v.
These are thereasons I have purchased abms.
The next issue is finding a charge controller with suitable charging profile for LiFe chemistry. Some say it's as easy as restricting voltage to around 3.65v per cell and all is good...But is it?
This brings me to my question...I have only found a fewthat some say are suitable and a couple that are supposed to be designed around these batteries, one being the Australian designed GSL electronics GSL MPPT60-1L. Does anyone have any experience with these?
The other option I've been considering is either the Eltek flatpack 2. Or the Elcon TC48v charger both of which I think can be controlled by the batrium system.
Would be great to hear your thoughts
Cheers