[RE-wrenches] Design Software?

[Kelly Larson]

Hi y'all,

Since I haven't been doing layout/design recently, I wonder what 
software I can recommend to a client.  He is a newbie doing mostly 
commercial systems - some roof and some ground mount.  The software 
needs to layout strings for string inverters, calc voltage drop, 
conductor sizes, etc, and show distances.

Suggestions?

Thank you in advance,
Kelly