Hi everybody,
I'm working on an installation with 3 BlueSolar MPPT charger an 2 parallelized Multiplus II inverters.
I whould like to know the best practice to connect au safety switch to shutdown all the devices on one shot.
Can I simply parallelize a NC safety switch on all "remote on/off" connectors of the devices?
Thanks
The Multi's have an aux input that can be programmed as an emergency stop. The MPPT's are a little more difficult as you would need to reprogram the VE-diect port to act as a remote control input. The other method would be to use a 2nd NC contact on the stop switch to open relays on the PV side of each MPPT. The multi's also have the remote switch input. However, paralleling the multi's logic inputs is not generally recommended due to ground voltage differences, power up sequencing problems etc. You should use blocking diodes to connect the logic inputs to the switch. ground from 1 inverter should be used to the other terminal of the switch.
Hi Mike and w8dev,
thank you for your response.
Finally, I've use a double NC safety switch connected on the remote input of each Multi.
I doesn't shutdown the MPPTs.
