Re: [RE-wrenches] Short Circuit Cell Damage

2012-09-17 Thread benn kilburn
Mark, Shorting the string should not be an issue. Unless you work at night, obviously there will be an arc when you cut the jumper, so remember to cover the whole string with an opaque covering beforehandŠ I think I remember reading that somewhere?!?! Or just be careful, try to do it when the irrad

Re: [RE-wrenches] Short Circuit Cell Damage

2012-09-17 Thread Larry Crutcher, Starlight Solar Power Systems
Mark, Think about this: the Isc current is only slightly higher than Imp. Picture a series DC circuit. Both short circuit and operating current are loads on the PV module(s). An indefinite short will not be a problem any more than operating the module at higher than 1000W/M/2. Neither will there

[RE-wrenches] Short Circuit Cell Damage

2012-09-17 Thread Mark Frye
Wrenches, True or False: In a nominal sort of grid tied situation with string Voc at about 300 VDC and Isc at about 6 or 7 amps..It is OK to install modules on a roof in the sun and short the pos and neg together indefinitely. In other words modules can handle operating at Isc continuous

Re: [RE-wrenches] posting request

2012-09-17 Thread David Brearley
Steve, Have you checked out SolarNexus? http://www.solarnexus.com/ As I understand it, their goal is to provide all of the functionality you describe in a single platform. Best regards, David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer ™ david.brear...@

[RE-wrenches] posting request

2012-09-17 Thread Steve McCarney
Dear Wrenches Can anyone recommend a software package that is good for solar electric project management? We would like to be able to have the capability to coordinate scheduling, procurement, budgeting, expense tracking as well as noting communications about a given project. If an integrated pack