Solar Water Heater Maintenance

For many, one of the best parts of the day is sinking into a nice, hot, relaxing bath. But imagine turning on the tap and instead of warm water, you’re greeted with cold water that refuses to heat. If you have a solar water heater system, you can often avoid this nightmare by following a routine maintenance schedule.

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What Are Some Tasks Homeowners Need to Do Regularly to Keep Their Solar Water Heaters Well Maintained?

Solar water heaters are an efficient and cost-effective way to heat your home’s water supply and can save you as much as 80% on your water heating costs. But like any other water heater, these systems require routine care. The following are some routine maintenance tasks to keep your water heater operating efficiently.

Solar Panel Inspection and Cleaning

Water heater solar panels are usually mounted on the southern part of your roof, where they absorb sunlight to transfer heat to your water. Due to their location, these solar collectors often accumulate dirt, dust and debris and can become damaged due to exposure to the elements. For optimal performance, it’s important to inspect and clean these solar panels at least once a year.

Tools/Materials Needed:

• Mild detergent

• Soft brush

• Bucket of warm water

• Microfiber cloth

Steps:

1. Shut off the system. Flip the breaker to your water heater to prevent accidents.

2. Check the panels. Inspect the flat panels that collect sunlight. Contact a qualified technician for the repair or replacement of any damaged parts.

3. Clean the surface. Use a soft brush and warm, soapy water to gently scrub the panels.

4. Rinse with clean water. Rinse away all soap residue and dry the panels with a microfiber cloth.

5. Restore power. Flip the breaker to restore power.

Inspect and Clean the Water Tank

Over time, your water heater can accumulate mineral deposits and sediments that can keep your system from operating efficiently. Flushing the system at least once a year will keep it clean and prevent clogs.

Tools/Materials Needed:

• Garden hose

• Bucket

Steps:

1. Shut off the main water valve. Shut off the main water valve in your home. It’s usually located in the basement or crawl space close to the front wall of your foundation.

2. Drain the water tank. Attach a garden hose to the drain valve on the bottom of your water heater tank. Open the valve and let all the water out.

3. Flush out the tank. Turn on a hot water faucet somewhere in the home. Let the hot water flow out of the hose for a few minutes to flush the tank. Once all the water is out, close the drain valve.

4. Inspect for leaks. Check the outside of the tank for any pooling water. If you notice any signs of leaks, it’s important to contact a plumber.

5. Perform a system test. Disconnect the hose and turn the water back on. Let the tank fill. You should hear the blowers activate if it’s a sunny day.

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Examine the Connections and Insulation

Leaks at the pipe connections and poor insulation can cause heat loss in your solar water heater system, making it harder to keep your water warm. It’s important to inspect both for maximum efficiency.

Tools/Materials Needed:

• Wrench

• Insulation or foam pipe wrap

• Plumber’s tape

Steps:

1. Inspect the insulation. Water heater insulation should be wrapped around the body of the tank, covering most of the surface. Check for any gaps or damage in the insulation and replace it. Wrap any exposed pipes in foam pipe wrap.

2. Check all exposed pipes. Check under pipes to look for standing water and watch for any leaks.

3. Tighten the pipe connections. Use a wrench to tighten any connections between the pipes and your water heater tank.

4. Seal the leaks. For minor leaks, dry the connectors and apply a layer of plumber’s tape. For larger leaks, it's best to contact a plumber.

Check the Water Pressure on Your Solar Water Heater System

Your water heating system’s pressure relief valve is located near the top or side of your water heater. It has a small lever or knob with a small pipe that extends downward. The valve prevents dangerous pressure from building up inside the tank to reduce the risk of explosions and damage.

Tools/Materials Needed:

• Bucket

Steps:

1. Find the valve. Locate the valve on your solar heat water tank. If you’re not sure where the valve is, check your owner’s manual.

2. Open the pressure valve. Turn the knob slowly or lift the lever to allow some of the water pressure to discharge. Be sure to catch the water in a bucket.

3. Ensure it operates correctly. The water should flow freely from the valve and stop when it’s closed.

4. Replace if needed. If the valve sticks or is leaking, you should contact a plumber for a replacement.