Solar Photovoltaic (PV) Panel Kit for the Toyota Prius Electric Hybrid

There's a discussion on this in the yahoo mailing lists. The device charges the 12V battery. The 10% claim is not supportable based on the information they provide.

Regardless, it is way overpriced, even if it did recharge the traction battery.

That's my take on it, too. It would take a pretty expensive system to add charge safely to the HV battery. And the way the Prius warms up might negate any advantage - the battery is free to charge during the mandatory engine warm up run.

Mike