Commercial Solar Hot Water
If your business uses hot water, you can experience immediate and dramatic savings by installing a solar hot water system.
ReVision has installed hundreds of commercial solar hot water systems in Maine and New Hampshire. Our clients include:
- Hotels, motels, and inns
- Retirement/assisted living communities
Solar hot water systems capture the energy of the sun and uses it to heat your water - the heated water is then pumped into your existing plumbing systems and your usage of fossil fuel energy sources (oil, gas, or electric) is reduced.
State and Federal Rebates and Incentives
Numerous state and federal rebates are available to help you make a solar energy project happen. For example:
- A federal investment tax credit worth 30% of the cost of the system
- Accelerated depreciation benefits that can reduce your tax liability by as much as 34% of the system cost
- State rebates up to $50,000 in New Hampshire or $4,000 in Maine
- L.L. Bean - System on Flagship Store in Freeport, Maine
- Guinness and Porcelli's - Bar Harbor, Maine
- Maple Hill Farm - Hallowell, Maine
See our full listing of state and federal solar rebates and incentives.
Solar Hot Water System Design
While the concept of capturing solar heat energy is simple, there are a number of aspects of design that are critical to building a reliable, effective system that will last 20-30 years in New England's challenging climate.
Solar hot water collectors are typically mounted on a south-facing roof section, but we also have plenty of experience ground-mounting systems when the roof is not a viable option. Major system components include the collectors, a purpose-built solar storage tank, copper piping, pump and electronic controls.
Some systems are profiled in our blog:
How it Works
Whenever sunshine makes the solar hot water collectors hotter than the water in the bottom of the solar storage tank, a differential temperature sensor automatically activates the solar pump affixed to the tank.
Sun-heated antifreeze is pumped from the collectors and circulated through a heat exchange coil located in the bottom of the storage tank, transferring the heat from the sun to your domestic hot water supply.
Here is an example of a complex system that integrates solar with an existing gas water heater:
ReVision Energy builds automatic backup into all solar domestic hot water systems so that when the sun can't get the job done, you don't have to worry about cold water. The solar storage tank has a secondary heat exchange coil located in the top of the tank, which is plumbed to your existing heating system for backup. If this is not possible, alternative solutions include using a special tank with an electric element for backup, or installing an on-demand hot water heater.
Types of Solar Hot Water Collectors
There are two major designs of solar hot water collectors - evacuated tube collectors and flat plate collectors. Each has pros and cons, and part of the design process is determining which collector best meets your situation.
Evacuated Tube Collectors
We use Apricus evacuated tube collectors for most solar domestic hot water systems. Apricus collectors boast a vacuum tube design which provides superior insulation to flat plate collectors, which prevents system heat losses during cold weather.
In addition to better cool weather performance, evacuated tube collectors can handle higher water temperatures, which makes them usable for process water heating.
Flat Plate Solar Hot Water Collectors
We also use American-made Solene Aurora flat plate solar hot water collectors because of their superior summertime performance. Flate plates and are also slightly less expensive.
Their improved summer performance makes flat plate solar hot water collectors a good choice for inns, hotels, restaurants and other businesses with high summer-season demand.
Both types of collectors will last 20+ winters in Maine or New Hampshire and come with ReVision's 24/7 emergency service guarantee.
Engaging ReVision Energy
If you're ready to start talking about solar for your business, please contact us for a free, professional, and in-depth consultation about your energy use and viable of solar for your location.
We also frequently bid on projects and are engaged by engineers and architects as a sub-contractor or designer on renewable energy systems.
Here are some other resources for your review: