KindMind writes: Clarian Power, a Seattle startup, is promising "plug-in" solar panels at $600 to $800 installed per panel for homeowners and small businesses. A typical installation is three panels, at around $2400 installed. These generate about 200 watts a panel, so a three panel systems would be 800 watts A single panel would save 30 to 40 kilowatt hours per month, translating to around $50 a year in energy cost savings. The estimated payback for a setup like this is estimated at four years, with tax credits and rebates taken into account. This is a supplemental power system, for replacing outside utility power, not for selling back to the utility company. The target date to have these for sale is sometime in 2011.