rich1.0ObjectiF MooN⚡️₿ (npub1mp…60pxm)https://nostr.now/npub1mpz30qp2gdr403t2apjzhla56fh94hs8zgznw5pp26q0tztw27dsu60pxmnjumphttps://nostr.nowFor example, if i need it only for shower, is it a on demand instant system or it's work with a water tank ? how many antminer S9 do i need to heat enough water for let's say 5 showers per day ?