Vertical Solar Water Tank
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Vertical Solar Water Tank
Millionsun specializes in OEM and ODM manufacturing of vertical solar water tanks for distributors, solar brands, system integrators, and installers worldwide.
Vertical water tanks can only be installed vertical. Millionsun’s vertical solar water tank capacities range from 100L to 500L, compatible with residential and small commercial projects.
Key Features & Performance
Premium Color Steel Shell
Attractive coated finish, waterproof and corrosion-resistant. Suitable for both indoor and outdoor installation.
Corrosion-resistant Stainless Steel Inner Tank
SUS304 / SUS316L stainless steel liner. Fine welding ensures reliable pressure resistance.
Industry-leading Polyurethane Insulation
One-shot foamed polyurethane layer. Daily heat loss ≤3℃ for excellent heat preservation.
Built-in Electric Booster
Integrated electric heating element acts as backup heating when solar power is inadequate.
Full Safety Protection
Equipped with temperature & pressure relief valve, leakage current protection and backup heater thermostat protection.
Great Compatibility
Easy to pair with residential solar systems.
CE Certified
Meets CE certification requirements.
Vertical Solar Water Tank Specifications
| Tank Type | FC/100L | FC/150L | FC/200L | FC/300L | FC/400L | FC/500L |
|---|---|---|---|---|---|---|
| Dimension | Φ520×975 | Φ520×1312 | Φ520×1590 | Φ570×1780 | Φ570×2300 | Φ700×1880 |
| Tank capacity | 105L | 155L | 210L | 315L | 415L | 525L |
| Tank inside | Material: SUS316L / Thickness: 1.5mm | |||||
| Tank outside | Material: galvanized steel sheet and UV coating / Thickness: 0.5mm | |||||
| Insulation | Material: Polyurethane / Thickness: 50mm | |||||
| Tank cap | Material: Plastics | |||||
| Connector | G 3/4" Male | |||||
| Work pressure | 0.7 MPa | Testing pressure | 1.2 MPa | |||
| Electrical support | 1.5 KW or 2.4 KW | Protect | TP valve, Air valve | |||
| Tank inside install copper heat exchanger |
Yes or no (According to the requirements of customers) |
|||||
What we offer?
OEM & ODM Manufacturing Support
Private Label Production
CKD / SKD Supply Supported
Sizes from 100L to 500L
Sizes from 100L to 500L
Electric Heating Element Options
Copper heat exchanger (optional)
Magnesium anode rod (optional)
Custom Project Solutions
Custom tank capacities, dimensions, connection positions, heat exchanger configurations, and electrical specifications available for OEM customers and commercial projects.
Business Value
How the System Works?
In a Split Solar System (Closed-Loop)
Vertical tank installed indoors. Roof-mounted solar collectors heat antifreeze fluid. A pump circulates hot fluid through the tank’s internal copper heat exchanger. Heat transfers to domestic water with no fluid mixing. Electric element delivers backup heat on cloudy days.
In a Heat Pump System
The tank connects to a heat pump as the primary heat source. The heat pump heats water gradually and stores it in the tank.
As an Electric Backup or Standalone Tank
The tank functions as a standard electric water heater with single or dual heating elements. Thermostat-controlled temperature maintenance.
For Commercial Applications
Multiple tanks can be connected in series or parallel to meet high-volume hot water demand.
Manufacturing & Supply Capabilities
OEM Manufacturing
Millionsun has a dedicated solar storage tank workshop producing pressurized and non-pressurized tanks since 2008. Products have been exported to Europe and Africa.
Integrated Manufacturing Resources
- 8,000 m² Production Facility
- 80+ Employees
- 6 Automated Production Lines
- Dedicated tank production workshop
- Tank production since 2010
- Tank output: 4,000 units per month
Flexible Supply Options
- Standalone tanks
- Tanks with electric heating element installed
- Tanks with copper heat exchanger
- Complete system packages
- Private label / custom branding
- CKD / SKD supply
Technical Resources Center
Frequently Asked Questions
We work systematically to integrate corporate responsibility in our core business and make our expertise available for the benefit of the societies where we operate.
Do you offer OEM service?
Yes. We make tanks for your brand. Tank size, connections, heating elements, and packaging — all customizable.
What sizes are available?
Is the tank pressurized?
Both options available. Pressurized tanks have 0.7 MPa working pressure (1.2MPa test pressure). Non-pressurized tanks are available for low-pressure applications.
What materials are used for the inner tank?
SUS304 or SUS316L stainless steel. You choose based on your water quality and budget.
Can the tank work with antifreeze systems?
Yes. An internal copper heat exchanger coil can be added for closed-loop solar systems.
What heating element options are available?
1.5KW ~3KW elements. Single or dual configuration. 220V or 110V available.
What support do you provide?
Product documents, installation guides, dimension drawings, and project support.
Request OEM Quotation
Visit Our Factory
Building 14, Baiwang Science and Technology Park, No.40, Chuangxing North Road, Gaobu Town, Dongguan City, Guangdong Province, China