Archive for November, 2009

Batteries for Solar PV Off-Grid Systems

Tuesday, November 17th, 2009

Batteries
Technically, a battery is any device that can store energy.  But what we typically refer to when we think “battery” is an electrochemical device that converts chemical energy into electricity through a galvanic cell.  A galvanic cell is a device consisting of two electrodes of different metals that we call anode and cathode, and an [...]

A Quick Way to Figure out Roof Angle for Solar Installation

Wednesday, November 4th, 2009

Roofers and Solar Installers don’t always talk the same language when it comes to explaining roof angle.  Solar Installers are always told to install panels at an angle – given in degrees (usually based on latitude position).  Roofers, on the other hand, use construction terms to define a roof angle. A  roofer describe this angle [...]