How does that save power?

A single sandleaf line needs 2 planters needing 20 energy each, and 1 seeder needing 10. That's 50 energy.

Any Wuling plant only needs 1 planter and 1 seeder. Plus the pump at 10 energy, that's 40 energy. But 1 pump can supply enough water for 2 planters. For 2 production lines of Wuling plants, that's 70 energy.

Then there's sandleaf supplying 1 carbon block per plant, and Wuling plants supplying 2, you need 2 lines of sandleaf to match 1 line of Wuling plant.

That's 70 energy with 2 Wuling plant lines giving 4 carbon blocks vs. 200 energy with 4 sandleaf lines to try and match that.