Are anybody have decision for electrical shock prevent system in case of firefight operation for roof projects?
Thanks in advance!

How big of the roof and the project? (residential/commercial)

3MWp project, commercial, roof square is 84 000 sq m

We have seen G2G 420W panels with "smart box" technology that have fire supression capabilities build into the inverter as well...

Who is manufacturer of this devices?

If you will use micro inverters you will have no DC power distribution wiring and if AC power disconnected from the grid (via main disconnect is off) ac power will be off from the micro inverters at the module ... so no power anywhere on the roof, Dc or AC

You can buy panels with preinstalled on them inverters with dual warranty for both.

Ok, I understand this way, but it isn't good for me... I plan to use 27kW inverters with long dc cable links. Do you know any other ways?

DC Disconnects on each combiner box and pile of blankets store on the roof for fireman to cover solar panels - string - source of fire. No miracles

Mr. Fox!
Thank you very much for this discussion. This question is clear enough for me now.

Hi Kirill
In SANTON We have a product for your request. This is the FSS - Emergency switch that switch the instalation with a mulitpole switch. If you are interested please contact me to my email: jperez@santonswitchgear.com