On Tuesday, December 16, 2014 7:55:12 PM UTC, Rod Speed wrote:
Dave Liquorice wrote
Dennis@home wrote

Grid tie inverters run the panels in series anyway - the inverters
normally take 600VDC input, depending how many panels you have.

(That's why fire brigades won't enter
houses with solar panels to put fires out.)

They aint that stupid here.

Pretty stupid really.
A 240V AC supply can have about 350V peak on it which is only
a bit less than 10 solar panels in series would be operating at.

Yeah but the 240 mains supply has a big
switch that can isolate the house wiring.

So does solar. In fact it's the same switch.

With Solar PV and those volts and appreciable current are "just there".

Nope, they have to have the same system.

The grid tie invertor should shut down when it loses the grid

And that is a legal requirement, because otherwise
you can electrocute someone trying to fix a grid fault.

but that DC is still present in wiring

No it is not.


Are you asserting that the grid isolator is also required to disconnect all the series wiring between the individual panels?

Maybe the fire brigade only tackle such fires at night.

Robert