We've gone from ~200 GW installed per year to ~400 GW per year.
The India mega solar farm [2] is quoted as designed to deliver 30 GW from 72,600 hectares (179,398.5 acres).
Sanity checking ( 437 / 30 ) x 179,398 gives 2.6 million acres.
[1] https://ourworldindata.org/grapher/installed-solar-pv-capaci...
[2] https://en.wikipedia.org/wiki/Gujarat_Hybrid_Renewable_Energ...