The full weight of a 50 percent tariff on Indian goods took effect this week, undercutting one of the country’s most promising markets for solar exports.

Businesses and policymakers are casting around for help from unlikely places, as the country’s exports to the United States are crushed by 50 percent tariffs.

The full weight of a 50 percent tariff on Indian goods took effect this week, undercutting one of the country’s most promising markets for solar exports.