In this blog post, we will explore why solar water heaters are a great investment for North Carolina homeowners, discuss how they work, explain what’s required to add one to your home, and touch on how they can be used in conjunction with solar panels to maximize energy savings.
Why North Carolina is Ideal for Solar Water Heaters
North Carolina enjoys a favorable climate for solar water heating systems. The state receives an average of 2,600 hours of sunshine per year, which translates to plenty of energy available to heat water efficiently. While areas like the deserts of Arizona and California and Florida are famously sunny, it turns out that North Carolina also receives high sunshine levels. Using NOAA data, NerdWallet ranked 174 cities by the percentage of potential annual sunshine. Notably, six North Carolina cities made the list: Wilmington (63%), Charlotte (62%), Cape Hatteras (60%), Greensboro/Winston-Salem (60%), Asheville (59%), and Raleigh (58%)!
Sunlight Availability in Different Seasons
The amount of sunlight available varies across different seasons, which impacts the efficiency of solar water heating systems.
- Summer (June - August): The sun shines for approximately 14 to 15 hours per day in peak summer months. During this period, a solar water heater can operate at maximum efficiency, providing ample hot water without relying on backup heating sources.
- Fall (September - November): Days begin to shorten, but homeowners can still expect 10 to 12 hours of daylight, making solar heating effective, especially when coupled with a well-insulated storage tank.
- Winter (December - February): The shortest days occur during winter, with only 9 to 10 hours of daylight in December. However, solar water heaters are still functional, though some systems may need an auxiliary backup on extremely cloudy days.
- Spring (March - May): As the days get longer again, solar water heating systems return to peak performance, making them a year-round sustainable option for homeowners.
For real-time sunlight data and seasonal variations in North Carolina, homeowners can refer to sources like NASA’s Surface Solar Energy Data or the National Renewable Energy Laboratory (NREL).
How Solar Water Heaters Work
A solar water heating system harnesses the sun’s energy to heat water for household use. The process involves several key components:
1. Solar Collectors
Solar collectors absorb sunlight and convert it into heat. The two main types used in residential systems are:
- Flat-plate collectors: A dark-colored, insulated box with a transparent cover that absorbs solar radiation and transfers it to the water inside.
- Evacuated tube collectors: More efficient than flat-plate collectors, these consist of rows of glass tubes with a vacuum inside, which minimizes heat loss and maximizes absorption.
2. Heat Transfer Fluid
The collectors use a heat transfer fluid (either water or an antifreeze solution) that absorbs solar heat and circulates it through the system.
3. Heat Exchanger & Storage Tank
The heat exchanger transfers the absorbed heat from the fluid to the household water stored in an insulated tank. This ensures a supply of hot water even when the sun isn’t shining.
4. Backup Heating System
During cloudy days or winter months, an electric or gas-powered backup heating system ensures uninterrupted hot water availability.
What is Needed to Add a Solar Water Heater to Your Home?
If you’re considering installing a solar water heater, several factors must be evaluated to ensure the system is effective and meets your household’s needs.
1. Suitable Roof or Ground Space
Most homeowners install solar collectors on their rooftops, ideally facing south for maximum sunlight exposure. If roof space is limited, collectors can also be installed on the ground in an open area that receives sufficient sunlight.
2. Plumbing Compatibility
Your existing plumbing system must be assessed to ensure compatibility with a solar water heating system. In some cases, modifications are needed to integrate the new system properly.
3. Storage Tank Capacity
A properly sized storage tank ensures you have enough hot water at all times. The tank size depends on the number of people in your household and your daily water usage.
4. Permits and Regulations
Homeowners must comply with local building codes and regulations before installing a solar water heater. Checking with North Carolina’s Department of Environmental Quality or local municipalities ensures compliance with all necessary permits.
5. Professional Installation
Proper installation by certified professionals ensures optimal system performance and efficiency. At Action Service Company LLC, our expert technicians handle the entire installation process, from site assessment to final setup.
Financial Incentives and Savings
One of the most compelling reasons to invest in a solar water heating system is the financial savings it provides. Homeowners in North Carolina can benefit from several incentives and rebate programs:
- Federal Solar Tax Credit: In the past this tax credit has allowed homeowners to deduct 30% of the cost of installing a solar water heating system from their federal taxes. Review current tax regulations for updated tax credit information.
- Duke Energy Solar Rebates: In the past, homeowners who installed qualifying solar energy systems, including solar water heaters were eligible for rebates. Consider looking into updates on this rebate program.
- Piedmont Electric’s Renewable and Solar Energy Loan Program has provided up to $15,000 in low-interest loans for solar installations. Check the current program for updated information and eligibility.
- State and Local Rebates: Some municipalities offer additional incentives. Homeowners can check the Database of State Incentives for Renewables & Efficiency (DSIRE) for a complete list.
On average, homeowners may be able to save 50% or more on water heating costs annually with a solar water heater.
Using Solar Panels in Parallel with Solar Water Heaters
Many homeowners pair solar water heaters with solar photovoltaic (PV) panels to maximize energy savings. While solar water heaters provide hot water, solar panels generate electricity, reducing overall utility bills. According to SEIA (Solar Energy Industries Association), North Carolina ranks among the top 10 states for solar energy adoption, with over 8,000 MW of installed solar capacity powering thousands of homes.
How Solar Panels Benefit Homeowners
- Lower Energy Bills: Solar panels offset electricity costs, potentially reducing monthly bills by 50% or more.
- Net Metering Benefits: Homeowners can sell excess electricity generated back to the grid, earning credits on their utility bills.
- Increased Home Value: Studies show that homes with solar panels sell for 4-5% more than those without.
- Environmental Impact: Solar panels reduce reliance on fossil fuels, decreasing carbon emissions and contributing to a cleaner environment.
Why Choose Action Service Company for Your Solar Water Heater Installation?
With over 60 years of licensed plumbing experience, Action Service Company has the expertise to seamlessly install and maintain solar water heating systems. Our team ensures that each installation meets high-quality standards, providing homeowners with reliable and efficient hot water solutions.
Our Commitment to Quality
- Expert Consultation: We evaluate your home's energy needs to recommend the best solar water heater system.
- Professional Installation: Our technicians ensure proper system setup for maximum efficiency.
- Ongoing Support: We offer maintenance services to keep your system running smoothly.
Read more in our blog about what our electrical licenses mean for your plumbing projects.
Conclusion
Switching to a solar water heater is a smart investment for North Carolina homeowners. With ample sunlight, financial incentives, and environmental benefits, solar water heating offers a sustainable and cost-effective way to meet household hot water needs.
Pairing solar water heaters with solar panels can further enhance energy savings, making your home more efficient and eco-friendly. At Action Service Company, we are here to help you make the transition to solar energy hot water heating seamless and hassle-free.
Interested in learning more? Contact us today for a consultation and take the first step toward a cleaner, greener, and more energy-efficient home!