Admin Group
Joined: 05/06/2004
Location: AustraliaPosts: 5118
| Posted: 12:33am 05 Mar 2020 |
I've changed plans. Decided to go the low voltage element path. I've ordered a 48v 1000w element, and sourced some 230 watt 60 cell solar panels locally for $55 each.
I'll be using a different tank to. My 300 litre tank is getting rusty, and I have a 120 litre tank in good condition, plus it has a thicker layer of insulation. Using that formula Solar Mike linked to, and assuming I get 800 watts power from the panels, if the tank drops to 30c over night, 3.5 hours of sun will bring it back up to 50c.
Even in winter, say I only get 500 watts from the panels, it will take just under 6 hours.
Glenn
The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ