DIYBMS v4

[Daemon_D (Daemon256)]

@rolfbartels

Hey Everyone,

So I have been running the DIYBMS on a 2P7S 1650 powerwall for the past 2-3months and I am still having some issues with the shunt trip being tripped randomly.
@stuart

• Is there a delay configured in the code before a trip is initiated, something to the effect that if the rule is met ( especially the voltage and temp rule ) that the rule has to be met for a min 5s before the relay is activated, My thinking is that maybe the BMS is getting random abnormal readings and tripping the shut.
• When the BMS looses wifi is it resetting or something, it would seem that these shunt trips are more prominent when we have wifi or internet issue.
• If it is a simple high to low on the PFC chip then can someone help me with a circuit or resistor of sorts that will require the 5v to the relay be active for at least 3s before the relay is tripled to try stop or eliminate these high low signals. Something that needs to build up and drains once on more current is applied.

I recently change from using the Powerwall a purely backup to now running my essential load off grid, and these trips are painful as it trip at random times and them all our essential load go off until someone goes to the Powershed and resets it.

If the @stuarts advice does not help, then a simple delay is implemented through a capacitor and a high impedance resistor.