India, Sept. 15 -- The solar pumping manufacturer that built its name on making almost everything itself has just moved to close the one gap in that chain. A fresh capital infusion into its wholly owned subsidiary is funding a new manufacturing facility in Madhya Pradesh, aimed at a component the company has always sourced from outside vendors until now. The step fits into a capacity build-out that's already well underway elsewhere in the business. What it actually costs, how big the new facility will be, and what it means for margins is worth digging into.

Shares of Shakti Pumps (India) Ltd are trading at Rs. 478.45, down 3.11 percent on Tuesday. The stock touched the intraday high of Rs. 493.75 after opening at Rs. 492.90 before slipp...