What would be a good battery to use for renewable energy generation? If the anual average wind speed of an off-grid house was 6 m/s and had a roof at 30 degrees due south (for the use of solar PV). What kind of battery would you suggest I purchase so that it can be used for a turn key system and last for up to 3 days using wind power and solar PV? - The average power consumption per week of the house is 111.657 KWh [more inside]
posted by sockpim on Dec 30, 2009 - 25 answers

Why hasn't solar energy been able to replace fossil fuels in Europe where gas is taxed so heavily? [more inside]
posted by MrMulan on Aug 31, 2005 - 33 answers