[strken]

It's possible and often desirable to calculate the estimated impact of externalities, positive and negative. Human lives are (in)famously given a monetary value by environmental agencies to enable this calculation.

I think the more likely explanation is that this is a pilot project by a clean energy startup, it intentionally operates at a loss because it's RnD rather than mature tech, everyone involved is okay with this, and the company doesn't want to release its modelling of future ROI because that's valuable proprietary data and giving it away to clients and competitors is dumb.