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When we talk about solar water heating system then solar water heater is the main device we need in the system. Often called as a solar domestic hot water system, solar water heater can be an affordable way to create warm water for your home. They can be utilized in any environment, and the fuel they use-- sunshine-- is free.

Solar Hot Water Heater: Are They Worth The Cost?

Installing a solar hot water heater is one popular method for homeowners to lower their electrical expense. These systems utilize renewable energy to decrease the need for grid power while delivering high volumes of warm water.

In this blog site, we'll describe how solar warm water heating systems work, evaluate popular brand names, provide tips on choosing the right one for you, and most significantly - reveal you just how much money you can save.

What is a Solar Hot Water Heater?

Unlike conventional water heaters, solar hot water heater don't use energy from the grid to heat water. Instead, these high-efficiency devices use dedicated solar collectors on your roof to draw power from the sun. The solar power gathered is then used to heat the water in your home.

Solar water heaters have actually been extremely popular in the past since they reduced your electrical expense and enable you to heat up your water with clean energy. The solar batteries directly heat your water, and do not provide any other solar energy to your house.

More recently, individuals have actually been going with electrical heat pump hot water heater, which are combined with home photovoltaic panel systems. Electric heat pumps use grid energy to heat your water, however, when coupled with a home solar system, they have the ability to still operate on solar electrical energy. If you aren't able to set up a full home solar system, or if you have an off-grid house, a standalone solar water heater can be a terrific choice.

How They Work in Solar Water Heating System

Solar water heating unit can produce sufficient warm water to satisfy the majority of your day-to-day domestic hot water requirements. The systems consist of tank and solar batteries. There are two types of solar water heating unit: active, which have flowing pumps and controls, and passive, which don't. Each of these works in a different way and consists of different equipment.

Active Solar Water Heating Systems

Active solar hot water heater utilize a pump to flow warm water from the solar batteries, or absorbers, to your home. These are generally installed in locations with chillier climates, as the water gets kept in a tank that can be kept indoors to prevent freezing.

There are two types of active solar water heating systems:

  • Direct flow systems, where the water is warmed directly in collectors, and is then sent out to your faucet and showerheads. The solar collectors are generally metal or glass tubes. Pumps circulate home water through the collectors and into the home. They work well in climates where it rarely freezes.
  • Indirect flow systems, in which a heat transfer fluid, like propylene glycol, is heated up within the solar collectors, and then moves the heat to the water system with a heat exchanger in a closed-loop system. Some heat loss occurs while the transfer fluid circulates the system.

Pumps circulate a non-freezing, heat-transfer fluid through the collectors and a heat exchanger. This warms the water that then streams into the house. They are popular in environments vulnerable to freezing temperature levels.

Passive Solar Water Heating Systems

Passive solar water heaters do not use flowing pumps to move warm water. Instead, they depend on convection as the flow system, where hotter water rises to the surface and cold water sinks, in order to flow water.

They are usually less costly than active systems, as they do not require unique devices to pump the water. They're normally not as effective. Passive systems can be more dependable and might last longer. There are two standard types of passive systems:

  • Integral collector-storage passive systems

These consist of a storage tank covered with a transparent product to allow the sun to warm the water. Water from the tank then streams into the plumbing system.

Integral collector solar water heaters are large, black water tank that are developed into a separated box with a top that lets sunlight through. The sunshine warms the water directly in the black tanks, which then streams into your pipes system when you need hot water.

  • Thermosyphon systems

Passive thermosyphon systems use metal flat plate collectors to heat little batches of water on your roofing. When you open your warm water valves, hot water in the top of the batch collector flows down from your roofing system to your faucets. These usually are developed to include 40 gallons of water.

Water is heated in a collector on the roof and then flows through the plumbing system when a hot water faucet is opened. Most of these systems have a 40 gallon capacity.

Many passive systems include a tankless heating unit as a backup energy source, which can either be gas or electrical.

Tank and Solar Collectors

The majority of solar water heaters need a well-insulated storage tank. Solar storage tanks have an additional outlet and inlet linked to and from the collector. In two-tank systems, the solar hot water heater preheats water prior to it enters the conventional hot water heater. In one-tank systems, the back-up heating system is integrated with the solar storage in one tank.

Three types of solar batteries are used for property applications:

  • Flat-plate collector

Glazed flat-plate collectors are insulated, weatherproofed boxes that contain a dark absorber plate under several glass or plastic (polymer) covers. Unglazed flat-plate collectors-- usually utilized for solar pool heating-- have a dark absorber plate, made from metal or polymer, without a cover or enclosure.

  • Integral collector-storage systems

Understood as ICS or batch systems, they include one or more black tanks or tubes in an insulated, glazed box. Cold water first goes through the solar battery, which pre-heats the water. The water then continues on to the traditional backup hot water heater, offering a reliable source of hot water. They must be installed only in mild-freeze climates due to the fact that the outside pipes could freeze in severe, cold weather.

  • Evacuated-tube solar collectors

The fin's finishing absorbs solar energy however hinders radiative heat loss. These collectors are used more often for U.S. industrial applications.

Solar water heating unit often require a backup system for cloudy days and times of increased need. Traditional storage hot water heater typically offer backup and may currently become part of the solar system package.

A backup system might also become part of the solar battery, such as rooftop tanks with thermosyphon systems. Considering that an integral-collector storage system currently shops hot water in addition to collecting solar heat, it may be packaged with a tankless or demand-type hot water heater for backup.

Choosing a Solar Water Heater - How to Select the Right One?

Each type of solar water heating unit works best in various environments. Direct systems work best in areas that don't typically see temperature levels below freezing. In cold climates, indirect active systems are more resistant to freezing damage.

Want your solar heating unit to do double duty? Invest in an indirect flowing system The heating fluid can be redirected to heat your pool or health spa in between working to provide your home with heated water.

Families that use more warm water throughout daylight hours gain from integral passive systems. By producing several small batches of warmed water, family members will not need to fret about having enough warm water for early morning showers.

Have more roofing system than ground area? A thermosyphon solar hot water heater fits on your roofing system, which leaves you more area in your living area.

Integral collector storage systems can weigh over 400 pounds, so you need to make sure your roofing can support the weight of a heavy water tank.

You also have to think about how much sunlight your property receives, how much hot water you utilize daily, and your spending plan.

When shopping for solar water heater options, search for rankings from the Solar Ranking and Certification Corporation (SRCC). SRCC rankings enable you to easily compare various brands and models utilizing specialist third-party data.

Every residential or commercial property is special, so you should likewise seek expert guidance to ensure you select the best system for your home. Talk with an installer in your area to find out more about suggested equipment for your job.

What Are the Most Popular Brands of Solar Water Heaters?

As solar technology continues to find brand-new applications in our every day lives, more business are manufacturing solar heating units. These are some of the most popular models on the marketplace today.

  • Duda Diesel produces machinery that uses biodiesel and other alternative fuels. They provide a series of solar hot water heater for property and commercial usage.
  • Sunbank Solar produces collectors, pumps, plates, and other parts for solar water heating systems.
  • SunEarth uses a series of solar power services for homes and organizations, including solar water heating unit and aspects.
  • Apricus and Rheem are two of the more popular solar water heaters.

How much you invest in a solar warm water heating system depends upon what type of system and what size system you get.

Smaller passive solar hot water heater systems might cost around $3,000, while a bigger active system could run you more than $10,000.

Things to Consider Before Installing a Solar Water Heating System.

Before to you buy and set up a solar water heating system, you want to do the following:

  • Quote the cost and energy performance of a solar water heater
  • Examine your website's solar resource
  • Determine the appropriate system size
  • Investigate local codes, covenants, and policies.

Comprehend the different parts needed for solar water heating systems, including the following:

  • Heat exchangers for solar water heater
  • Heat-transfer fluids for solar water heating systems

Installing and Maintaining the System

The proper setup of solar water heaters depends upon lots of factors. These elements include solar resource, climate, local building regulations requirements, and security issues; therefore, it's best to have actually a qualified solar thermal systems specialist install your system.

After installation, effectively keeping your system will keep it running efficiently. Passive systems don't need much maintenance. For active systems, talk about the upkeep requirements with your system service provider, and seek advice from the system's owner's manual.

Plumbing and other standard water heating components need the same upkeep as conventional systems. Glazing may require to be cleaned in dry environments where rainwater doesn't supply a natural rinse.

Routine upkeep on easy systems can be as infrequent as every 3-- 5 years, ideally by a solar contractor. Systems with electrical parts usually need a replacement part or two after 10 years. Learn more about solar water heating unit maintenance and repair.

When evaluating possible professionals for setup and/or maintenance, ask the following concerns:

  • Does your company have experience installing and preserving solar water heating systems?
  • Select a business that has experience installing the kind of system you desire and servicing the applications you pick.

How many years of experience does your business have with solar heating setup and maintenance?

The more experience the much better. Ask for a list of previous customers who can offer recommendations.

Is Your Company Certified or Accredited?

Having a valid plumbing's and/or solar contractor's license is required in some states. The licensing board can likewise tell you about any complaints versus state-licensed professionals.

Improving Energy Performance

After your hot water heater is appropriately installed and maintained, try some extra energy-saving techniques to help decrease your water heating expenses, especially if you require a back-up system. Some energy-saving gadgets and systems are more affordable to set up with the water heater.

How Much Can You Save With a Solar Water Heater?

Solar water heaters need a substantial in advance investment - in many cases around $5,000.

After installation, a solar hot water system will slowly start to pay back their value in the form of lower energy costs. Solar hot water heating systems can generally cut your water heating expenditures by anywhere from 50% to 80%!

When you reach the end of your solar payback period, your solar hot water heater will be producing almost complimentary warm water for the remaining lifetime of the system! Plus, because solar hot water heater don't have moving parts, they have reasonably low upkeep costs.

Remember, depending upon how much hot water you utilize, you might have to count on a backup grid-tied warm water system.

To determine your potential savings, you'll need to understand:

  • How much hot water your household needs everyday.
  • The expense of fueling your backup heater. Contact your local utility company to learn more on energy costs for backup heaters.
  • The SRRC or solar energy factor score for your designated equipment. These numbers offer you an idea of how effectively your device will use collected solar power.
  • How much of your hot water use takes place throughout daylight hours. Utilizing more hot water when there's less sun available means more dependence on costly grid energy. The life expectancy of your solar water heating system. The longer your heater parts last, the more money you'll save.

With this information, you can identify the annual operating expense of your solar hot water heater. Compare this to your routine monthly utility costs to see just how much energy cost savings you might get by changing to solar.

What Rebates and Rewards Are Available for Solar Water Heaters?

The Financial Investment Tax Credit, likewise called the Federal solar tax credit, uses a credit equal to 26% of the expenses of setting up a solar hot water heater. Let's say your solar water heating system costs $5,000. You'll receive a tax credit of $1,300, bringing the total cost of your system down to just $3,700.

Your regional utility company might offer unique discount rates or rebates for the setup of competent equipment. For example, Hawaii Energy offers refunds of $750 to consumers who install a solar hot water heater.

Find a solar water heater installer in your location to decrease your energy expenses without compromising comfort.

Solar Water Heater vs Home Solar Panel System, Which One Should I Get?

Solar water heaters were a popular alternative till a few years ago. The present trend is for homeowners to just get a photovoltaic panel system set up rather.

Why? Since the expense of photovoltaic panels has fallen a lot in recent years. The most cost-effective choice is to combine a domestic solar panel system with an electrical hot water heater. The solar panel system will not just cover your hot water costs, but the energy expenses of your whole home. Plus, electrical hot water heater are more efficient than even the highest quality solar hot water heater.

Of course, solar water heaters can be worthwhile sometimes. They are more effective than photovoltaic panels at their particular function - heating water. The sunlight only needs to heat the water, not get developed into electrical energy that then powers a system to heat the water.

Solar hot water heater likewise require much less roofing space than a full solar system. If you have significant space constraints, solar hot water heating systems could be the best method for you to make the most of solar power.

Regional solar business will have the ability to set up both solar panel systems and solar water heaters. They'll likewise have the ability to determine what would be best for you - getting just one or both. To learn more, including how much a solar energy system would cost for your house, contact a vetted regional solar power installer in your location.


While the upfront expense of a solar hot water heater may be higher than standard hot water heater, the solar energy you'll harness can yield excellent savings and environmental benefits. Heating water represent 18% of a home's energy use, however a solar water heater could cut your water heating bills by 50 to 80%.

Solar-powered hot water heating system can help you take advantage of a free, renewable resource, potentially saving money and doing helpful for the world. Wish with this info, you could make the best choice about whether a solar water heater is an excellent financial investment for your home's hot water requirements.