Series fusing for string installations [RE-wrenches]

[William Miller]

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Bob-O:

In SLO county we are allowed to delete any roof-top disconnects if we run 
metallic conduit.  All of our pitch roof PV installs have the modules flat 
with the roof pitch, therefore no rack there to mount a combiner to.  I do 
not like roof mount disconnects for a whole range of reasons (get out the 
ladder to check fuses, extra hardware to secure the disconnect to the roof, 
etc.).  This particular job is a barrel tile roof anyway, so who wants to 
replace the tiles after you access the fused combiner.

WM








At 01:22 PM 8/1/2005, you wrote:
>Marco, William and all,
>Another option would be to use a small rack mounted fused combiner box 
>like Energy Outfitters sells in conjunction with a regular H361 at the 
>inverter or an inverter such as the Fronius or Xantrex which has the DC 
>disco onboard. That way you've got just one set of conductors coming down 
>from the roof. Once the big switch is open, the HV touch-safe fuse holders 
>can be opened safely.
>Bob-O

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