太陽 たいよう ねつ発電 はつでんじゃなかったです
taiyōnetsuhatsudenjanakattadesu

Noun
Desu Copula

The polite, past negative form of 太陽熱発電

1. Wasn't solar power generation.; Wasn't using solar power.

Past/Perfective
Negative
Polite
Casual Register