The guidelines for Skyhook cable is about 2,000 lbs per 1/8 th inch of rope diameter. ( Guideline only - check with the Manufacturer for specific applications )...
Or a 1/8th inch cable will be adequate if the panels are resting on Ledgers and cable stayed to plumb in 4 directions... Also,be sure to spec 'Galvanized' as they might be there for a long time.
