I had no update problems with 2.4.0, all went perfectly. ipad mini 2. In fact, I've never had an update issue. Perhaps the ios just works better? Sorry to hear so many are having problems, but is it more an issue with Android apps, or I just lucky?
Hi, I use a 1000w Pure sine wave inverter to charge my solo batteries. I too travel with a camper trailer out bush and have no problems feeding the solo for another flight.
Tonyo