Solar

Panels, hot water, off-grid systems and solar lighting. Sizing, payback periods and choosing an installer.

What off-grid solar living involves, the benefits it offers, and the core system components needed to power a home without the grid.

How solar panels compare to other renovations on return on investment, and why a 6 kW system can add roughly $25,000 to a home's value.

How photovoltaic panels work, what wattage really measures, and the four factors that affect how efficiently your solar panels perform.

Nine questions to ask a solar panel installer, covering panel quality, sizing, roof condition, pricing, warranties, certifications and referrals.

Calculate your household electricity use, compare panel efficiency types, and use a simple formula to estimate how many solar panels you need.

Falling equipment costs, federal tax credits and a property value boost make solar one of the most cost-effective home improvements available now.

Seven practical arguments for solar outdoor lighting, covering easy installation, fewer bulb changes, garden and patio use, and horse arena lighting.