So there's a high power car audio amplifier that runs with high DC voltages.
Amplifier works from a range from 120Vdc to 415Vdc. max input
current draw from 1 - 133 ampers. depending on the power you demand from it.

I would ran 30 ampers at most for short periods, or even less,
probably 10 ampers at most for daily driving. My question is, would the hybrid battery ECU throw a code?
From the extra current draw from the amplifier?
I am a engineer, and also been installing solar panels.
I know the risks that involve using high voltages.
And i would be running DC circuit breakers.

this on a 2009 hybrid silverado , and giving that it has two 60KW motors.
and both motors pulling 400 ampers at full power.

Anyone have any experience running electronics fromt the hybrid battery?

 

You know this will not work. The fluctuation of your amp will cause problems with the 300v battery. That's why there is a capacitor that you can buy to compensate for the amp draw.

 

First problem is attachment. The HV DC is isolated from chassis ground. So negative to chassis is -180V and positive +180V.

Next is the dual HV isolation diagnostic systems. If the tapped in system is not real high in impedance ( > 3 Meg )and it is detected by either isolation system... you walk.

The hybrid and HV battery computers are in constant contact. The system adds up current and double checks. If the amplifier pulls too much unaccounted for current... codes.

You can try to pull 400 amps but the fuse in the orange HV battery service dissconnect will blow by 200. In less than 2 seconds.

The HV system is all shielded cable and is completely isolated from chassis ground.