And they're assuming $0.1 per kWh, which is ok for the US, but could mean faster ROI around the world. https://www.ovoenergy.com/guides/energy-guides/average-e

And they're assuming $0.1 per kWh, which is ok for the US, but could mean faster ROI around the world. https://www.ovoenergy.com/guides/energy-guides/average-electricity-prices-kwh.html https://www.ovoenergy.com/guides/energy-guides/average-elect... https://www.npr.org/sections/money/2011/10/27/141766341/the-price-of-electricity-in-your-state https://www.npr.org/sections/money/2011/10/27/141766341/the-...