The houses, propped up over the water on stilts, are cobbled together from old plywood, corrugated steel, and rusted chicken wire. But walk inland and you reach a clearing covered with an array of a hundred solar panels mounted atop bright new metal frames. Thick cables transmit power from the panels into a sturdy building with new doors and windows. Step inside and the heavy humidity gives way to cool, dry air. Fluorescent lights illuminate a row of steel cabinets holding flashing lights and computer displays.

The building is the control center for a small, two-year-old power-generating facility that provides electricity to the approximately 200 people in the village. Computers manage power coming from the solar panels and from diesel generators, storing some of it in large lead-acid batteries and dispatching the rest to meet the growing local demand. Before the tiny plant was installed, the village had no access to reliable electricity, though a few families had small diesel generators. Now all the residents have virtually unlimited power 24 hours a day.