Environmentally Friendly, High Efficiency, Low Noise
Solar panel water heaters use solar water heating panels to convert sunlight into thermal energy for water heating. These solar panels for water heating provide a green, renewable, and zero-emission solution for hot water demand. They can be hybrid energy heating operation mode, where solar energy is complemented by optional auxiliary electric heating for high-efficiency. Perfect choice of water heater for high rise building.
Your Reliable Solar Panel Water Heater Manufacturer
Haoha is your first choice of solar panel water heater manufacturer, specializing in flat plate solar water heaters for global markets. The water tanks are also made at Haoha’s main plant, whereas the flat panel units, together with their mounting brackets, are manufactured by our affiliated factories. Having multiple factories working at the same time, we become much more efficient in terms of production and delivery.
The water tank, heating element, and mounting bracket of the flat panel water heater are easy to install when it is delivered. Nevertheless, this is not a cause of concern because we have detailed instructions on how to install and have even shot step-by-step installation instructions to make sure that you end up successfully installing and using the unit once you have received it.
Solar Panel Water Heater By Capacity
We provide full customization for your solar panel water heaters, from inner water tank manufacturing to collector configuration. Meanwhile, we offer some standard size tank water heater with solar panel options for your selection, helping customers quickly select the right water heater with solar panel based on household size or project demand.
With 20 gallon hot water tank, the 100L model offers reliable hot water supply for small households scenarios. Optional 2000W electric backup heating. The water heating solar panels are customizable.
The 120L compact solar panel hot water heater is ideal for small households with stable and efficient hot water supply. Optional 2000W electric backup heating and customizable solar water heater panel.
With a 40 gallon hot water tank, this water heater with solar panel offers efficient heating with a 2000W electric backup heating. Perfect for small households with 54mm insulation and 0.7MPa rated pressure. Details customizable.
With a 50 gallon hot water tank inside, ideal for medium-sized homes. This model offers energy-efficient heating with 50mm insulation and a 2000W electric backup. Customizable solar water heater panels.
With a 60 gallon water tank inside, it offers efficient heating with a 2000W electric backup. Ideal for larger households, featuring 50mm insulation for reliable performance. Details customizable.
Featuring an 80-gallon hot water tank, it delivers stable and energy-efficient hot water for large households or commercial applications. With full customization options.
With 100 gallon hot water tank, the large-capacity model is designed for villas, hotel and commercial projects with high hot water demand. Optional 2000W electric backup heating. Full customization options.
500L model features high-efficiency flat plate collectors and a large insulated tank, delivering reliable and energy-saving hot water for commercial and large residential use. Optional 2000W electric backup heating and customizable details.
Why Choose a Solar Panel Water Heater?

By consuming the same amount of energy, it can produce more hot water, saving 30%-75% on annual water and electricity costs.

The core components of the high-quality models have a long lifespan, requiring no frequent replacements over the long term.

Powered by renewable energy, with no reliance on fossil fuels. Long-term helps reduce carbon emissions.

Support remote control by mobile app, eliminating the need for manual operation and ensuring precise matching of water usage times.
Strict Quality Control for All Your Solar Panel Water Heaters
All solar panel water heaters produced by Haoha are manufactured under standard production processes and strict technical specifications. As a professional solar panel water heater manufacturer, every unit is tested to ensure long-term safety and stable performance before delivery.
Each inner water tank undergoes two pressure tests and one pulse fatigue test to verify sealing integrity and pressure resistance.
These tests ensure that the tank will not leak or crack even under continuous high-pressure operation over an long service life.
We only approve the tanks that pass all required tests for final assembly into solar panel water heaters, supporting our customers in reducing installation risks, after-sales issues, and long-term maintenance costs.


Customize Your Solar Panel Water Heater
Haoha offers flexible customization for solar panel water heaters to match different climates and application needs. We provide jacketed water heater with solar panel, helping reduce heat loss and improve thermal efficiency. For circulation type, solar panel water heater circulation pump ensures stable and efficient heat transfer. And circulation ports can be configured as side circulation or bottom circulation according to installation layout.
The hot water tanks and solar panels for the water heater can be customized. In addition, each water heater with solar panel can also be supplied with or without electric backup heating, providing reliable hot water under different weather conditions.
In jacketed solar panel water heaters, a heat transfer fluid is used to capture the solar energy. This fluid, in turn, conducts the heat to water through an internal heat exchanger in the storage tank, and this fulfills the heating purpose. They are very good in freeze protection but have minor losses in heat transfer. These models can work in cold or warm areas.
Solar water heaters that have internal water circulation include a plate that is directly attached to the storage tank. The water takes up the heat and moves through the tank to be stored without being exchanged in a different heat exchange, providing higher thermal efficiency. However, this design is applicable only in warm-up areas since in low temperatures, ice will be formed and the tanks will break down.
More About Solar Panel Water Heater
More general information about solar panel water heaters you may want to know.
- General Dimensions
- After-Sales Service
| Solar Panel Water Heater | ||||||||
| Rated Volume(L) | 100L | 120L | 150L | 200L | 250L | 300L | 400L | 500L |
| External Dimensions (mm) | Φ480×950 | Φ520×1050 | Φ520×1300 | Φ580×1310 | Φ580×1570 | Φ580×1830 | Φ600×1950 | Φ650×2100 |
| Diameter of Inner Cylinder (mm) | Φ380 | Φ400 | Φ412 | Φ480 | Φ480 | Φ480 | Φ500 | Φ550 |
| Insulation Thickness (mm) | 50mm | 50mm | 54mm | 50mm | 50mm | 50mm | 50mm | 50mm |
| Heat Exchanger Mode | Mezzanine | |||||||
| Electric Heating (W) | 2000W | |||||||
| Rated Pressure (MPa) | 0.7 | |||||||
| Waterproof Rating | IPX4 | |||||||
| Size of Hot & Cold Water | G3/4 Internal thread | |||||||
| Size of Inlet & Outlet | G3/4 external thread | |||||||
We are committed to provide reliable and responsive after-sales service to support our customers’ business. Every solar panel water heater is produced under strict quality control before shipment..
We offer complete technical support for installation, operation, and troubleshooting. If any quality-related issues occur, replacement parts or solutions will be provided according to our warranty policy.
For the warranty claim, we ship replacement in the next order or other same region order. Our professional service will provide assistance at the same time for ensuring your business runs smoothly.
It’s very simple for one person to complete the installation. We’ll provide an installation video to ensure you can finish the setup.
We offer a three-year warranty. During this period, any quality issues will be resolved by providing you with a new unit.
Certainly, if you’re in an area with frequent rainy weather, we can equip your solar panel water heater with electric heating. This allows you to use electric heating to supplement solar heating.




















