I just got back from being out in the bush for four days and I vape a sub-ohm (.52 Ω ). Lotta watts, (34 on a full 18650).
I only brought 5 batteries so pretty much continuously(from sunrise) I kept a single 18650 in an xtar MP1S connected to a Thunderbolt Magnum Solar Panel from Harbor Freight (5 watt). (http://www.harborfreight.com/5-watt-foldable-solar-panel-charger-60449.html).
I took most of the day, but it powered up an 18650 (drained down to 3.8v) up to 4.1-4.2v.
I am a heavy vaper, but I didn't run out of vape. Just kept rotating as long as the sun was in the sky.
So, it works and it works on the cheap.
XTAR MP1S: $10
Thunderbolt Panel: $35
Blowing Huge non-stop clouds while camping: Priceless
I only brought 5 batteries so pretty much continuously(from sunrise) I kept a single 18650 in an xtar MP1S connected to a Thunderbolt Magnum Solar Panel from Harbor Freight (5 watt). (http://www.harborfreight.com/5-watt-foldable-solar-panel-charger-60449.html).
I took most of the day, but it powered up an 18650 (drained down to 3.8v) up to 4.1-4.2v.
I am a heavy vaper, but I didn't run out of vape. Just kept rotating as long as the sun was in the sky.
So, it works and it works on the cheap.
XTAR MP1S: $10
Thunderbolt Panel: $35
Blowing Huge non-stop clouds while camping: Priceless