All of renewable energy sources such as wind, sun heat, etc. are temporary and need to use them, is generally at a much later time than the present “overproduction” . This means that, that the use of any surplus energy (heating, solar, renewable), requires its storage for a long period of time .
Yote ya vyanzo vya nishati mbadala kama vile upepo, jua joto, nk . ni ya muda na haja ya kuzitumia, ujumla ni wakati baadaye sana kuliko sasa ” overproduction ” . Hii ina maana kwamba, kuwa matumizi ya nishati yoyote ziada (inapokanzwa, nishati ya jua, mbadala), inahitaji hifadhi yake kwa kipindi cha muda mrefu .