I think that PV has at least a 3% after-tax, ROI (not including the TOU arbitrage bonus). And right now that's hard to beat, as you know.planet4ever wrote:Yes, I see your emoticon, but seriously, this is something people need to think about before they switch plans or get a solar system. The time of day differential is really nice for half the year (sell excess power to PG&E during the afternoon at 30 cents/kWh, buy it back for 5 cents/kWh after midnight) but for the other half of the year you only gain 5 cents/kWh.
See for example http://www.thomaswlewis.com/?page_id=45 showing a simple payback of 9 years. With 20-25 year warrantees on panels, if someone owns their home and has the right exposure, I think its a no-brainer.
And E9A sweetens the pot. Considerably.