Renewable Energy Systems & Technologies, LLC

OFFICE (802) 672-2299 :: Po Box 277 :: Bridgewater Corners, VT 05035

Solar Energy Products | Vermont

RES-TEC offers a range of solar energy products to clients throughout Vermont and the surrounding region, including photovoltaic solar systems, wind energy systems, micro-hydro turbines, generators and solar thermal systems.

Photo-Voltaic (PV) Solar Systems

Photovoltaic or solar electricity is the most common source of renewable power. PV modules are relatively easy to site, have long usable lifetimes, and require little maintenance. Proper site analysis and orientation is critical.

To perform well they need to be mounted (typically ground/pole or rooftop) so that they face within a few degrees of true south at an angle approximately equal to your site latitude.

Modules should not be shaded by anything other than clouds from 9 am to 3 pm standard time everyday of the year.

The size (in watts) of your PV array is determined by how many watt hours will be consumed in your home and the percentage of consumed power to be produced by the PV array. Look for a manufacturer, and a type of PV module that has proven itself over many years. RES-TEC has excellent relationships with multiple long-term suppliers to best meet the needs of each project, assuring customer satisfaction.

Long-term warranty, power tolerance, operating characteristics, and cost are all considered in selecting the right module for your project. The warranty should be minimum 25 years on PV modules.

High power tolerance modules typically provide more power compared to their nameplate, producing more watt-hours in a year.

RES-TEC will design and install a PV Solar system that meets your needs, handle any state and local permits that may be required in your area, and file for any available rebates or incentives. Read more about our PV Solar Systems.

Wind Turbines

If you have the right site, wind power can be a fantastic way to generate renewable power. Relatively constant, good speed wind is required for an efficient blade type (horizontal axis wind turbines or HAWTs) wind power installation. Newer vertical axis wind turbines (VAWTs) are not as efficient as HAWTs in good, stable wind environments, but they operate very efficiently in the more turbulent, gusty wind conditions of rural home and small business sites. Vertical axis wind turbines are cheaper, safer and more environmentally friendly than horizontal axis wind turbines. Either way, monitoring and analyzing site-specific wind conditions is critical.

With our state-of-the-art anemometers and data loggers, RES-TEC provides short and long term monitoring and site analysis, for estimates of actual power produced. Note that small wind turbines in the mountainous areas of New England require the perfect site conditions, which are rarely found. Additionally, Solar PV has come down in price over the last few years, where it is much more cost effective than small wind turbines, with no moving parts, no maintenance requirements, and highly reliable power production estimates, virtually guaranteeing your payback period. For these reasons RES-TEC recommends Solar PV over Wind turbines for most applications.

RES-TEC will design and install a wind power system that meets your needs, handle any state and local permits that may be required in your area, and file for any available rebates or incentives. Read more about our Wind Systems.

Micro-Hydro Turbines

If you have the necessary conditions for hydro power (decent, year-round running water, reasonable vertical drop (or head), hydro power is the most reliable way to generate continuous renewable power. Installation costs can be significantly higher, depending on site conditions, but once installed, electricity generation is continuous, with little down time.

Note that grid-tied micro-hydro systems have significant environmental permitting requirements at both the Federal and State level. We will consult with the customer in acquiring these permits, however the process is the responsibility of the customer. Off-grid systems require no permits. Generally, RES-TEC will only install micro-hydro systems in conjunction with Solar PV systems for off-grid applications for optimization of your energy storage. Additionally, due to the considerable site work requirements for micro-hydro in installation of the intake, penstock, and turbine mounting, this effort is also, left to the customer. Solar PV has come down in price over the last few years, where it is much more cost effective than micro-hydro turbines, with no moving parts, no maintenance requirements, and highly reliable power production estimates, virtually guaranteeing your payback period. For these reasons RES-TEC recommends Solar PV over Micro-hydro turbines for most applications.

RES-TEC will design the complete system, supply turbine and electrical components, and consult closely with the customer for site installation, including turbine and electronics and file for any available rebates or incentives. To learn more about these systems and to see if your site is adequate for micro-hydro check out our Micro-Hydro Turbines web page.

Generators

Generators are typically used as a backup energy source to charge your battery bank when your renewable charging sources are not keeping up with your watt hour consumption or when the grid goes down (power failure, rolling blackouts). They are a necessary evil for most independent power producers (off-grid systems) and as a low cost backup for grid-tied systems during power failures. Additionally, generators can be a relatively inexpensive way to limit the size and cost of your main power-producing source (solar, wind, hydro, battery storage size) during the inevitable periods of cloudy days, windless days or drought periods. Generators are typically powered by gasoline, diesel, or natural gas/propane, depending on size and customer requirements. Generator systems can be fully automated or fully manual, to energize and provide power during low-solar or grid failure conditions.

RES-TEC can optimally size generator requirements for our customers, reducing total system cost while providing peace of mind and security by ensuring that you will have electricity under most conditions. Read more about our Generators.

Solar Thermal

The use of solar energy to heat domestic hot water and space is soaring, along with the cost of fossil fuels. New, more efficient heating technology makes solar even more desirable, cost effective and environmentally friendly, especially under extreme, variable weather conditions. In many areas of the country, the typical homeowner spends over 60% of domestic energy use on heat and hot water.

RES-TEC recommends that all homeowners with a reasonable solar exposure examine the possibility of supplementing their hot water and heating needs with solar thermal energy, reducing costs and dependence on fossil fuels.

This is especially true for new construction and for existing radiant floor heating, where many parts of the renewable energy system can be integrated, with relatively small, incremental construction costs. Typically, hot water is created in solar thermal modules of various types and efficiencies (similar in size and appearance to PV modules).

Heat is transferred to a storage tank where it can be used as needed for domestic hot water and space heating needs.  Solar hot water used to be a summertime only solution for camps and vacation homes.

Today, with the correct site and detailed system analysis, anywhere from 10-80% of a typical homeowner’s need for domestic hot water and space heating can obtained with less than a 5 year investment payback period. And with double digit increases in fossil fuel costs, the economics are getting better all the time.

RES-TEC will design and install a solar thermal system that meets your needs and handle any state and local permits that may be required in your area and file for any available rebates or incentives.

Read more about our Solar Thermal Systems.

Geothermal Systems

Geothermal heat systems are the most energy efficient, environmentally clean and cost effective space conditioning systems available today declared the EPA in the 1970's. And it's still true. Conventional residential and light commercial heating and cooling systems are generally fossil fuel and electricity based. As energy prices fluctuate the demand for Geothermal systems is on the rise. Ground Source Heat Pumps (GSHPs) are the most efficient types of geothermal systems and are becoming more common as the costs of energy and equipment maintenance rise. When properly designed and installed they not only reduce energy use but lower maintenance costs and extend equipment life since they have no exposed outdoor equipment.

Geothermal heat pumps, while not a new technology, remain a small but growing player in the residential and commercial heating/cooling sector. Although somewhat higher in first cost, this technology can, in the right application, quickly repay this cost premium through savings in energy costs.

RES-TEC will design and install a Geothermal system that meets your needs and handle any state and local permits that may be required in your area and file for any available rebates or incentives.

Read more about our Geothermal Systems.

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