It's called "Value Added Tax" in English (UK has same rules despite Brexit), because it works out as the tax on the value you add: Business 1 digs €1 of stuff out of ground, charges their customer e.g. 15% VAT; business 2 buys it for €1.15, claims that €0.15 back always, processes the stuff into €2 of new stuff, charges their customer (in this case) €0.30; business 3 buys it for €2.30, claims that €0.30 back always; etc. all the way to the end customer or export market.
If you're spending millions on power management equipment, you're absolutely a business, and absolutely will get to claim this tax back, and you effectively owe tax only on the net benefit it brings. Electricity is also subject to VAT, though the rates are allowed to vary, and the e.g. UK electricity VAT rate is 5% while the general rate is 20%.
https://en.wikipedia.org/wiki/Value-added_tax#Comparison_wit...