FAQ
Frequently Asked Questions
What are the components of a PV system?
A PV system is made up of several different components. These include groups of PV cells called "modules"
(also known as "panels"); one or more batteries; a charge regulator or controller for a stand-alone system; an
inverter for a utility-grid-connected system or when alternating current (AC) rather than direct current (DC) is
required; wiring; and mounting hardware or a framework.
How do I know if I have enough sunlight for PV?
A PV system needs unobstructed access to the suns rays for most or all of the day. Climate is not really a
concern because PV systems are relatively unaffected by severe weather. In fact, some PV modules actually
work better in colder weather. There is enough sunlight to make solar energy systems useful and effective
almost anywhere in the world. Most homes have adequate roof space for a PV system, and this can be
complemented by integrating the system into walls or by using modules to cover a porch or patio in the
backyard.
What is a stand-alone system ?
A stand alone renewable energy system is one that is not connected to the grid. This type of system is usually
more expensive due to the batteries required to store the energy.
How long do the technologies last in constant use ?
Many of the technologies we supply are expected to last more than twenty years. Technologies with moving
parts such as wind turbines, will eventually require replacement bearings. Solar panels, which have no moving
parts, last an extremely long time. Some of the earliest solar electric panels, made about 35 years ago, are still
producing energy today. Recently, photovoltaic panel manufacturers have started offering 20 year performance
warranties.