Hi Kate,
Are you looking for integrated products? IE, a radio or fan with built in
solar panels and battery? Or are you looking for DC powered radios and fans which could be run directly from a solar panel/battery system?
In either case, what size/application are we talking about?
For DC gear to add to a
solar power setup, the immediate cheapish options that come to mind are car stereos, and standard computer fans, both of which are 12V and often available cheap/free to the scavenging sort.
'Theoretically this level of creeping Orwellian dynamics should ramp up our awareness, but what happens instead is that each alert becomes less and less effective because we're incredibly stupid.' - Jerry Holkins