A one metric ton weight on a 30 meter tall tower has a potential energy of 81 watt hours. I’d stick with batteries.
The only places gravity storage works are where you have “free” height and huge amounts of free weight. That is, an existing lake at a good elevation for pumped storage. But on that note, it’s cheaper to buy and opportunistically fill a 1,000 gallon plastic storage tank than to buy the batteries needed to fill that storage tank on demand. Store the final product if you can. Hilton Dier III Renewable Energy Design Missisquoi River Hydro LLC _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
