We don't even know whether the OP load is a laptop or whether they are boondocking. But, here is a solution:
1) Plug whatever electronics or small DC loads you want with whatever adapters and inverters you have.
2) Get more solar :)
When 14W load run an hour or two becomes an issue, somebody has serious problems with energy supply and storage.
I don't even know the efficiency of my cordless drill charger. Must be 40% or less, since it's a diode cutting a half of 120 VAC. Good news is - doesn't matter to me whether it's drawing 50 or 100 WH per charge. My panel generates upwards of 1,200 WH in all but exceptionally rainy days (then it could indeed harvest as little as 200 WH, but don't forget 3,600 WH battery bank).
