[RE-wrenches] DC disconnect placement

[ryan]

I to agree it is nice to have a disconnect means at the pv array. I 
worry that touch safe fuses may give some one the wrong idea as they are 
not safe to open under load. they will catch on fire. I like the 
combiner with disconnect idea and I know there is a Huge player in the 
combiner market that is bringing a better line of these to market for us 
they will be more in line with what we need for residential arrays and 
may have some more nice features built into them as well.