Flat Plate Solar Water Heater – High-efficiency 150L system with stainless steel tank and pressurized design, ideal for homes and offices.

Table of Contents

150L Flat Panel Solar Water Heaters Overview:

A 150 liter flat panel solar water heater uses a flat plate solar collector to absorb sunlight and convert it into heat, warming water stored in an insulated tank. These systems are typically pressurized and suitable for domestic hot water.

Specifications:

Capacity: 150 L, suitable for 3–5 people.
Collector: Single or double flat panel (~2 m²) with selective coating.
Tank: Stainless steel (SUS304 or SUS316L) with polyurethane insulation.
High Pressure Operation: Handles municipal water pressure.
Passive Thermosyphon: Circulates water naturally.
Roof Compatibility: Flat or pitched mounting brackets.
Safety Components: P/T valves, magnesium anode rod.
Warranty: Around 5 years.

150L Solar Thermosyphonic System
Water Tank
Capacity of Tank	150L
Water Tank Type	【HIGH PRESSURE WATER TANK】
Outer Water Tank Dia.	Ф520/Ф540mm
Material of Outer Tank	Color Steel/Stainless Steel
Material of Inner Tank	Stainless Steel SUS304 or 316L
Thermal Insulation	Polyurethane*45/50mm
Joint of Water Tank	3/4’’
Circulation Pipe Joint	3/4’’
Max.Working Pressure	0.6Mpa
Flat Panel Collector
Solar Collector Model	X-2000100080mm
Collector Dimension(LWT)	2000100080mm*1pcs
Gross Area	1*2m2
Absorber Area	1.82 m2
Cover Material	3.2mm Low Iron Tempered Glass;Transmittance ≧91%
Coating	Black Chrome
Insulation Material	High Density Rock Wool
Absorptivity	≥95%±2%,Emittance
Emissivity	5% ±2%
Max.Working Pressure	0.7Mpa
Material of Frame	Aluminum Alloy, δ1.3mm, Multiple Color
Material of Back Plate	Galvanized Steel
Bracket (NCLINED ROOF OR FLAT ROOF MOUNTED)
Material	Galvanized Steel/Al.alloy/Stainless Steel (Optional)
Container Load(40’HQ)	100 SETS
REMARKS:
Warranty:	5(FIVE)years
Lading time:	15~20 working Days

How It Works:

● Sunlight hits the flat panel collector.
● Water in the collector heats up.
● Hot water rises to the insulated storage tank.
● Cold water enters the collector, cycle continues.

Reference Installation Diagram
(For Reference Based on 300L)

A flat plate solar collector consists of:

● Absorber plate – metal plate with a dark coating that absorbs sunlight.
● Transparent cover (glazing) – glass that lets sunlight in and reduces heat loss.
● Insulation – at back and sides to prevent heat loss.
● Pipes/headers – carry the heat transfer fluid.
● Casing/frame – protects the collector.

It works by absorbing sunlight, heating the fluid in pipes, and minimizing heat loss.

Advantages:

● High efficiency in sunny climates.
● Durable and low maintenance.
● Strong water flow for showers and taps.
● Cost-effective.
● No electricity required for circulation.

Considerations:

● Performance drops in cloudy weather.
● Electric booster may be needed for cold days.
● Requires sufficient roof space (~2 m²).
● Installation & Use Cases:
● Residential homes, guesthouses, offices.
● Retrofitting existing plumbing.
● Regions with high annual solar insolation.

Application:

Middle East, Africa…

Flat Panel Solar Water Heater Accessories:

Flat Panel Solar Water Heater Accessories:
Serial No.	Description	QTY. (Pcs)
❶	PT VALVE (90/95℃ Degree ) 3/4’’	1
❷	Non Return & Pressure Relief Valve 3/4’’	1
❸	Magnesium anode 1’’,80cm length	1
❹	DN16-3/4″ solar hose(SUS316L DN16-3/4″ corrugated stainless steetube OD20ID160.21mm,13mm EPDM insulation wall thickness,seamless UV resistant jacket)	1
❺	Controller panel,220V/50HZ	1
❻	Backing up electric heater element. 1’ or 1 1/4”	1
❼	Thermostatic mixing valve – 3/4’’	1
❽	3/4” to 3/4’’ Connector	2
❾	3/4’’ Stopper	2

Remarks:

For Region with heavy limestone and hard water… will strongly recommend install a pre-water filter for your water heaters

Main function of the pre-water filter:
● Remove calcium carbonate (limescale) and mineral sediments from hard water
● Reduce scale buildup inside solar water heaters, pipes, and heating elements
● Protect the inner tank and heat exchanger from corrosion and blockage
● Extend system lifespan and maintain stable heating efficiency
● Improve water quality for safer and cleaner hot water use

FAQs

Q1: What is a Flat Plate Solar Water Heater?

A: A Flat Plate Solar Water Heater is a solar water system that uses a flat plate collector to absorb sunlight and heat water, storing it in an insulated tank for domestic or commercial use.

Q2: Can a 150L Flat Plate Solar Water Heater meet a family’s daily hot water needs?

A: Yes, it typically provides enough hot water for 3–5 people, suitable for showers, kitchen, and household use.

Q3: What are the main benefits of a Flat Plate Solar Water Heater?

A: Benefits include energy savings, eco-friendly operation, low maintenance, durable stainless steel tank, and strong water flow with pressurized models.

150L Flat Plate Solar Water Heater