| Ed Earl Ross 2005-06-29, 4:25 am |
| Derek Broughton wrote:
quote:
> Vaughn wrote:
>
>
>
>
> All of my 24V panels have a simple jumper (Evergreen, BP & Siemens). There
> are no fewer connections if it's wired as 12V than if it's wired as 24V.
> All the 24V panels are then wired in parallel, so the worst case is that a
> failure takes out twice as much as if it was 12V.
There are two failure modes, open and short.
With parallel wiring, an open panel would merely reduce the current
available to the inverter. However, a short would mean one parallel
leg would only generate 12 volts and would adversely affect system
operation, severely. Except, panels with a smart protection circuit.
With series wiring, an open panel shuts down operation, except
panels with smart protection. However, a short would reduce output
voltage of the panel array, but still supply reduced-voltage power
to the inverter.
--
Humbly--Ed
"If the man doesn't believe as we do,
we say he is a crank, and that settles it.
I mean, it does nowadays, because now we
can't burn him." (Mark Twain)
|