Solar Technologies
Heating & Electric
Solar Water Heating Systems
Water heating ranks as the second largest household energy expense after heating/cooling. Most solar domestic hot water (DHW) systems operate by preheating water for a standard water heater that, when needed, operates as a backup to increase the water temperature. There are two categories of solar DHW systems: indirect and direct systems.
A typical solar DHW system is sized to provide 70% of the annual hot water heating load.
A solar water heating system often requires higher maintenance in freezing climates. Where freezing is possible indirect closed loop or drain-back systems are often most appropriate.
Solar Electric Systems
Photovoltaic technology (PV) converts sunlight into electricity. The basic building block of PV technology is the solar “cell” and several cells wired together are called “modules”. Other items that may be required with this system is an inverter which converts direct current (DC) into alternating current, batteries for stand alone systems, wires, conduit, fuses, safety disconnects, etc.
The more energy efficient your home is the greater impact a PV system will have. Measures such as increased insulation and energy-efficient lighting, appliances, and windows will drastically reduce a home’s use of electricity.
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