if charging a few small items is the end goal, what about forgetting PV and just using a 12V battery charger off vehicle batteries?

that way you can even charge items at night and on overcast days. a large car battery can recharge lots of cell phones, radio batteries, yet still start the vehicle later.

pick your items carefully: we live on solar-only so have always purchased battery-run items with low wattage to get the most out of the system (ie: our older laptops used 1.2 mA/hr but current macbooks uses 1/4th that).

and for back-up and travel, we always carry small inverters in each vehicle to recharge cell phones (should the DC charger die), small batteries, or run electronics directly. we've never had a problem starting vehicles after running a laptop for a couple of hours, which should be more than enough time to tell relatives/friends that you're ok during a crisis.

and if you're still interested in having PV, just get a panel to lay on the dashboard for topping off the car's battery.

as an added bonus, a car-based system allows you to easily bug-out with all this stuff, if necessary.

just a thought...