I managed to track down a professional adventurer!
He does expeditions across the country/continent & tests a wide range of gear too.
I shot him a mail & this was his response:
"In terms of the tracking / emergency comms system, the DeLorme inreach solution is the way to go... http://www.delorme.co.za/
The local guys rip you off a little, so rather try get the actual contract side of things direct from the US http://www.inreachdelorme.com/ and you'd look at the Recreation Plan to start with.
For emergency backup power, the PowerTraveller Adventurer is AWESOME! Unlike many other portable power systems, this gives you a battery pack AND solar in one. http://www.actiongear.co.za/solarmonkey-adventurer"
Please remember that this was an answer to my specific question...