BMS handling inverter peak

[houdayec]

Hi everyone,

I have recently purchased a 4x3.2v 280ah EVE cells to make my own battery on 12v.

However, I have some doubts about the max load of my BMS. Here's my situation:

I plan on using, sometimes, a 1000w inverter with a peak @ 2200w (183a) for a few seconds

At the same time, I will have an average of 30a connected equipments.

- Normal use would be: 83a (1000w/12v inverter) + 30a (equipments) = 113a -> in this case, a 150a would make a great job, without pushing to the limits
- Peak use would be: 183a (2200w/12v inverter) + 30a (equipments) = 213a -> 150a BMS would not be enough

What should I do? On normal usage, a 150a BMS is more than enough, but will it handle a 20s peak from the inverter?

Thanks in advance for your advices

 

[snoobler]

Many BMS have good short (very short) duration tolerance of high surge currents.

If you actually expect to utilize your inverter's surge power, you should size the BMS for it.

 

[houdayec]

Many BMS have good short (very short) duration tolerance of high surge currents.

If you actually expect to utilize your inverter's surge power, you should size the BMS for it.

I don't plan on using it. Thanks for your answer

 

[John Frum]

If its a high frequency inverter you can safely ignore the surge capacity as its rated in milli-seconds.