The solar power tariff fell to an all-time low, with Finland-based energy firm Fortum Finnsurya Energy quoting Rs 4.34 a unit to bag the mandate to set up a 70-mw solar plant under NTPC’s Bhadla Solar Park tender. “This is the lowest solar tariff so far in India. This has happened because of confidence in the balancesheet of NTPC and solar parks that come with all clearances and confidence in the market,” New and Renewable…