> A 20-year T-bill right now is only paying about 2.5%... > Even if it takes 20 years to pay off the battery system...
Batteries are not a source of energy. They produce nothing. Solar panels do. Far better to spend X dollars available for more solar panels which pay off themselves in about 3 years and use the nearly free storage in the grid. Self-storage (if you have access to the grid) consumes $2 out of every $3 invested in Solar with zero benefit other than about 4 hours of backup electricity a year (around here with a 99.96% reliable grid). That's spending several thousands of dollars for about 60 cents worth of electricity. If you don't have the grid, then sure, on-site storage is required. Oh, my zero-usage electric bill is an $8 fixed rate "meter" fee per month, or $100 a year. That is renting a 10,000 kWh storage system (the grid). Or about 100 kWh per dollar. Compare that with the 0.01 kWh per dollar for batteries. A 10,000 times better deal if there ever was one. Bob, WB4APR _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
