We have one of those and they're awesome, but overkill for your purpose. We just got a good 4' ladder at Lowe's and it does everything you'll need to put the Gizmos on. Also came in really handy when we had a monsoon and we'd left the awning out....had to remove all the remains and put into the back of the truck to get home. Another lesson learned.
Reread your post and you said solar PANELS...I was thinking the bunkend Gizmos. Yep, for the panels you're going to need something taller. They are dandy, but agree on being pricey.