Hi,
I have 240 Wc Solar Panel with a MPPT boost (CTKEV300). The battery of my e-bike is 19.2 Ah 36 V (4p10s) and the BMS on it is 5 amp recharging, which I find quite conservative for 19.2 Ah Li-Ion. I think I could charge 6.5- 7 Amp without damaging the cells. (36*5 = 180 W, 42*5 = 205 W) so more sun power than what can BMS do).
First, do you agree with that or would advise me to buy a new battery with more capacity for my 240 Wc Solar Panel ?
I do not know the exact spec of the BMS and head charging, if they're fused, cut off and how to restart it when it happen for I have not open the battery yet for the warranty.
I have two solutions :
- Buying a new BMS with over 7 amp capacity for the charge and replace the current BMS. My last solution, because I plan a trip with this bike for several weeks very soon.
- Charging by output. Solar panel probably will never produce more than 260 W at peak sun and my MPPT can have a limit at 42 V. Do I take some risk for me or for the battery in this case ?
If None of these, solutions is good, I could limit the max current by some ways but that is not my main idea.
Thank you for your opinion
I have 240 Wc Solar Panel with a MPPT boost (CTKEV300). The battery of my e-bike is 19.2 Ah 36 V (4p10s) and the BMS on it is 5 amp recharging, which I find quite conservative for 19.2 Ah Li-Ion. I think I could charge 6.5- 7 Amp without damaging the cells. (36*5 = 180 W, 42*5 = 205 W) so more sun power than what can BMS do).
First, do you agree with that or would advise me to buy a new battery with more capacity for my 240 Wc Solar Panel ?
I do not know the exact spec of the BMS and head charging, if they're fused, cut off and how to restart it when it happen for I have not open the battery yet for the warranty.
I have two solutions :
- Buying a new BMS with over 7 amp capacity for the charge and replace the current BMS. My last solution, because I plan a trip with this bike for several weeks very soon.
- Charging by output. Solar panel probably will never produce more than 260 W at peak sun and my MPPT can have a limit at 42 V. Do I take some risk for me or for the battery in this case ?
If None of these, solutions is good, I could limit the max current by some ways but that is not my main idea.
Thank you for your opinion