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paul-ham asked

3 phase ESS BYD high voltage Alarms

Having issues with a new system. All firmware up to date.

Has 5 RS 450/200 and a grid tied inverter on output. Batteries go into high voltage alarm and shut down the system.

Looking at battery CCL showing 0amps the Victron continues to charge also when trying to reduce charged voltage through DVCC it has no effect and doesn't follow the value set. Help needed

battery chargingvoltage
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1 Answer
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paul-ham answered ·

On this installation we are not using a fronius inverter and instead using a Solis on the system output (metered of course). As it is grid tied we won't get frequency shifting and instead expect any surplus to flow to the grid supply which it is doing. The issue is the power is still charging at a low rate to the battery resulting in high voltage alarms. We have high voltage alarms frequently on new systems but beyond this the system shuts down in high voltage protection mode.

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