yabert
Solar Enthusiast
Hi
I had some trouble with my Chargery BMS16 and after lot of emails exchanged with Jason (Chargery support) the conclusion is Chargery give false specification of the product. So be warned!
In fact, they indicate on their web page and on the manual this: BMS16 will alarm and cutoff charge or discharge according to users’ setup.
But it's completely false. The discharge will stop based on Under SOC protection. Despite if you set the low discharge protection to 2.8V, by example, the BMS will stop discharge based on SOC. This stop can be set from 5% to 90%.
At first, it don't seem a big problem, right? Up to the moment I realize that the SOC isn't adjustable and that 7% SOC is 3.65V.
So, 3.65V is the nominal voltage of many NCA or NMC cell chemistry (so around 50% SOC), but for Chargery 3.65V is near dead cell
Consequence of all that, you would not be able to use 20-40% of your battery capacity simply because the BMS SOC is dump.
The lost in capacity will depend of the discharge rate and the cells temperature, but you will lost battery capacity for sure.
I like the Chargery design (on/off switch, external display, ...), but it's unacceptable to sell a product with false spec.
Don't lose money and time like me and be warned.
If you have suggestion for a relay BMS with adjustable settings, it will be welcome.
I had some trouble with my Chargery BMS16 and after lot of emails exchanged with Jason (Chargery support) the conclusion is Chargery give false specification of the product. So be warned!
In fact, they indicate on their web page and on the manual this: BMS16 will alarm and cutoff charge or discharge according to users’ setup.
But it's completely false. The discharge will stop based on Under SOC protection. Despite if you set the low discharge protection to 2.8V, by example, the BMS will stop discharge based on SOC. This stop can be set from 5% to 90%.
At first, it don't seem a big problem, right? Up to the moment I realize that the SOC isn't adjustable and that 7% SOC is 3.65V.
So, 3.65V is the nominal voltage of many NCA or NMC cell chemistry (so around 50% SOC), but for Chargery 3.65V is near dead cell
Consequence of all that, you would not be able to use 20-40% of your battery capacity simply because the BMS SOC is dump.
The lost in capacity will depend of the discharge rate and the cells temperature, but you will lost battery capacity for sure.
I like the Chargery design (on/off switch, external display, ...), but it's unacceptable to sell a product with false spec.
Don't lose money and time like me and be warned.
If you have suggestion for a relay BMS with adjustable settings, it will be welcome.