If you are interested in buying a solar water heater for your home, consider the following before you buy.
1. Determine if your site is suitable.
Most solar water heating systems are installed on the roof. For best results, you roof should:
- Receive direct sunlight between the hours of 10 AM and 4 PM year round
- Face South (within 15°)
- Be sturdy with the shingles in good condition
- If your roof isn’t appropriate for a solar water heater, but you have suitable unshaded land next to your home, you may want to consider a ground-mounted system instead.
2. Decide what type of system meets your needs and lifestyle.
You can tell your condition and budget to us or our dealers, they can help you to choose the right solar water heaters. Or you can consider as follows:
- Understand how solar water heaters work so you can discuss which collector type and circulation system makes the most sense for you.
- Protect against freezing in colder climates. Some solar systems are appropriate for freezing climates, while others are not. As a general rule, if there is a good chance that temperatures will fall below 42°F (5℃), choose either a closed-loop system with antifreeze as the heat transfer fluid (split pressurized solar water heaters), or a integrated pressurized heat pipe solar water heaters.
- Estimate the capacity you’ll need. Use the gallon/liter capacity of your current water heater as a starting point. You can find your current water heater’s capacity or volume on its nameplate. This should help you decide the sizing of your solar system. If you have recently added or are planning to add more occupants to your household or a new shower, faucet, dishwasher or washer that will be in frequent use, take that into account in your consideration.
Usually, you will need double capacity of your current electric water heater. Because electric water heater can be heated again and again, while solar water heater only can be heated once a day.
3. Search for rebates and utilize tax credits.
You may be able to reduce your costs by taking advantage of rebates or tax credits. Be sure to review the eligibility rules before you make your purchase. Now there are many rebates and tax credits for solar water heaters in different countries.
And it always share 20-50% of the total cost, will be very helpful for you.
4. Don’t forget about maintenance.
After installing a solar system, it is important to perform periodic maintenance to ensure efficient operation. In addition to hiring a qualified contractor for annual maintenance inspections, you should periodically check the following:
On the roof or ground, depending on installation:
- Collector is clean and not shaded
- Collector is sound, sealing and glazing are not cracked or yellowing
- Fasteners connecting collector to roof are sound
- Piping and wiring are well-connected, well-insulated, and without damage
- Roof penetrations are well-sealed
In the home:
- Pressure relief valve is not stuck completely open or closed
- Pumps (in active systems) activate when the sun is shining
- Pipes are free of mineral build-up.
If you live in an area with hard water, you may need to add de-scaling agents to the water every few years. For example, you can run a vinegar solution through the collector or hot water loop every three to five years.