Ah right - that is more a problem of peace corps and similar projects. You can't just "air drop" technology into a place to produce economic results, it has to fit in with the local economy. Unfortunately in Afghanistan the local economy is opium.
(see also: attempted modernisation of collective farming in communist countries; "rocket stoves"; pumps driven by "children playing", and so on.)
I have a 4kW set up here at 56 degrees north in Scotland. The big downside is not the diurnal cycle but the seasonal one; off-grid is not viable here without wind. If I've read this map correctly New York state goes up to 45N, so you should get great power in summer but need to think carefully about winter. I believe you also get colder winters than us?