Question 1

Designed for Versatility & Long-Term Value

Residential
          Perfect for homes and villas requiring efficient hot water solutions

Commercial
          Ideal for hotels, hospitals, and office buildings

Industrial
          Robust solution for manufacturing and processing facilities

Agricultural
          Sustainable heating for greenhouses and farming operations

Built for Decades of Low-Maintenance Operation

Accepted Answer

The EFPC Series captures solar energy efficiently with large-area flat plates and integrated technology, providing stable heat across diverse applications. Built with premium materials and precision engineering, it sets a new benchmark in sustainable solar heating with exceptional durability and minimal maintenance requirements.

Question 2

Selective Absorber Coating
          Efficiency Reaching 0.813

Soletks Solar is one of the world's few manufacturers capable of independently producing both blue and black selective absorber coatings, the heart of every high-performance solar collector. This vertical integration ensures superior quality control and optimized optical performance from the very beginning of production.

The EFPC Series employs a selective coating designed to maximize solar absorption while minimizing thermal radiation loss. Laboratory tests conducted by national-level research institutions confirm a thermal efficiency of 0.813, marking it as one of the most efficient flat plate collectors in the market.

This means stronger performance, even under cloudy skies or low-irradiance environments common in many regions.

2
        
          Full-Channel Optimization Using Finite Element Analysis
          Provincial-Level Innovation Award

Using Finite Element Method (FEM) analysis, Soletks engineers optimized the internal flow channels of the EFPC collector to achieve balanced heat distribution and enhanced energy transfer. This precision design ensures that every part of the collector performs at peak efficiency, avoiding the uneven heating issues often seen in traditional flat plate systems.

Even under extreme temperature differences, the EFPC delivers steady, powerful thermal output. This advanced design approach has been recognized with provincial-level innovation awards, highlighting its contribution to modern solar thermal engineering.

3
        
          Insulated Chamber Structure
          Heat Loss Coefficient as Low as 2.2

A key highlight of the EFPC design is its "insulation chamber" — a dedicated thermal barrier layer that dramatically reduces heat loss in both operating and standby states. With a heat loss coefficient as low as 2.2, it surpasses typical industry standards and ensures consistent efficiency even in fluctuating weather conditions.

Thanks to this innovation, the EFPC performs exceptionally well in climates with wide day-night temperature variations, maintaining stable operation and efficiency for many years with minimal degradation.

Technical Specifications

Parameter
              EFPC115
              EFPC150

Outline Dimension (mm)
              5030×2270×140
              5960×2520×166

Surface Area (m²)
              11.42
              15

Lighting Area (m²)
              10.48
              13.92

Net Weight (kg)
              235
              315

Working Pressure (MPa)
              1.0 MPa

Interface Size/Number
              HTC40 Quick Connector (Two)

Maximum Operating Temperature (℃)
              150

Peak Efficiency
              0.79
              0.81

Rated Efficiency
              0.66
              0.68

Peak Power (kW)
              8.28
              11.26

Specified Power (kW)

@ 400W/m²
              1.7
              2.03

@ 700W/m²
              4.3
              5.84

@ 1000W/m²
              6.85
              9.4

Displacement Volume (L)
              11.5
              13.8

Pressure Drop
              2kPa @ 0.22kg/(m²·s)

Installation Point
              Four

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Our Projects
            Global Solar Energy Excellence
            Pioneering sustainable energy solutions across continents, delivering innovative solar heating and hot water systems.

Featured

Centralized Solar Heating for Saga County Town in Shigatse City
                    
                        2019
                        Shigatse, Tibet
                        107,000 m²
                    
                    EFPC115 large flat-plate collectors provide heating coverage for 107,000 m², replacing traditional coal and yak dung heating. Reduces coal consumption by 2,424 tons annually.
                    
                        World's first high-altitude solar centralized heating
                        First full-chain turnkey solar heating project
                        Tibet's first large-scale solar heating

Get Quote

View Details

Tianjin School TPV Pro+ Heat Pump Project
                        
                            2024
                            Tianjin
                            3,000 m²
                        
                        TPV Pro+ heat pump system meets students' heating needs while generating on-site electricity.

Get Quote

View Details

APEC Summit Hotel Hot Water System
                        
                            2014
                            Beijing
                            50 tons/day
                        
                        Supplies hot water for APEC Summit hotel. Saves 150,000 kWh annually, reduces CO2 by 74 tons.

Get Quote

View Details

Florida Resort Villa Hot Water Project
                        
                            2022
                            Florida, USA
                            200L/day
                        
                        Flat-plate water heaters provide 200L daily hot water for each resort villa.

Get Quote

View Details

Harz Church Hot Water Project
                        
                            2021
                            Germany
                            22 tons/day
                        
                        Engineering-grade collectors in series/parallel configuration provide reliable hot water supply.

Get Quote

View Details

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/* Lightbox Modal */
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.lightbox-modal.active {
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@keyframes lightboxFadeIn {
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.lightbox-content {
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@keyframes zoomIn {
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.lightbox-content img {
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.lightbox-close {
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      right: 30px;
      width: 50px;
      height: 50px;
      background: rgba(255, 255, 255, 0.95);
      border: none;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
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      z-index: 10001;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
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.lightbox-close:hover {
      background: white;
      transform: rotate(90deg) scale(1.1);
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.lightbox-close svg {
      width: 24px;
      height: 24px;
      stroke: #1e293b;
      stroke-width: 2.5;
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.lightbox-info {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(255, 255, 255, 0.95);
      padding: 12px 24px;
      border-radius: 30px;
      font-size: 14px;
      color: #1e293b;
      font-weight: 600;
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/* Responsive Design */
    @media (max-width: 1200px) {
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        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
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.certificate-image {
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@media (max-width: 992px) {
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        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
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.certificate-image {
        height: 280px;
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@media (max-width: 768px) {
      .certifications-section {
        padding: 60px 0;
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.certifications-container {
        padding: 0 20px;
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.certifications-title {
        font-size: 36px;
      }

.certifications-description {
        font-size: 16px;
      }

.cert-tabs {
        gap: 8px;
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.cert-tab {
        padding: 10px 20px;
        font-size: 14px;
      }

.certificate-image {
        height: 240px;
      }

.lightbox-modal {
        padding: 20px;
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.lightbox-close {
        top: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
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International Standards
      
        Global Certifications & Quality Assurance

SOLETK Solar products are certified to meet international quality and safety standards, including Solar Keymark, CE, and ISO. Below are the individual certificates for each product, demonstrating SOLETK Solar's commitment to reliability, performance, and compliance.

All Certificates
      ISO Certifications
      Solar Keymark
      Product Certificates

Test Report

Test Report Certificate

Accepted Answer

Quality Assurance Report

Question 3

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 4

ISO 9001 Quality Management

Accepted Answer

International Organization for Standardization

Question 5

ISO 14001 Environmental Management

Accepted Answer

International Organization for Standardization

Question 6

ISO 45001 Occupational Health & Safety

Accepted Answer

International Organization for Standardization

Question 7

Air Solar Collector

Accepted Answer

Product Certification

Question 8

Flat Plate Solar Collector

Accepted Answer

Product Certification

Question 9

PVT Solar System

Accepted Answer

Product Certification

Question 10

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 11

Solar Water Heater

Accepted Answer

Product Certification

Question 12

Vacuum Tube Solar Collector

Accepted Answer

Product Certification

Question 13

ISO 9001 Quality Management

Accepted Answer

International Organization for Standardization

Question 14

ISO 14001 Environmental Management

Accepted Answer

International Organization for Standardization

Question 15

ISO 45001 Occupational Health & Safety

Accepted Answer

International Organization for Standardization

Question 16

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 17

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 18

Air Solar Collector

Accepted Answer

Product Certification

Question 19

Flat Plate Solar Collector

Accepted Answer

Product Certification

Question 20

PVT Solar System

Accepted Answer

Product Certification

Question 21

Solar Water Heater

Accepted Answer

Product Certification

Question 22

Vacuum Tube Solar Collector

Accepted Answer

Product Certification

Question 23

Solar Integration

Accepted Answer

Advanced flat-plate collector technology maximizing energy efficiency

Question 24

117+ Patents

Accepted Answer

Cutting-edge innovation portfolio protecting proprietary technologies

Question 25

Research Partners

Accepted Answer

Strategic collaboration with leading institutions worldwide

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EFPC Series – Redefining Solar Thermal Performance

Soletks EFPC Series Large-Scale Flat Plate Collector

Designed for Versatility & Long-Term Value

Built for Decades of Low-Maintenance Operation

Core Technologies — The Science Behind the Innovation

Selective Absorber Coating

Full-Channel Optimization Using Finite Element Analysis

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글로벌 태양 에너지 우수성

사가현 시가지 중앙 태양열 난방

톈진 학교 TPV Pro+ 히트펌프 프로젝트

APEC 정상회담 호텔 온수 시스템

플로리다 리조트 빌라 온수 프로젝트

하르츠 교회 온수 프로젝트

글로벌 인증서 및 품질 보증

시험 보고서 인증서

솔라 키마크 인증

ISO 9001 품질 경영

ISO 14001 환경 경영

ISO 45001 산업 안전 및 보건

공기 태양광 집열기

평판 태양광 집열기

PVT 태양광 시스템

솔라 키마크 인증

태양열 온수기

진공관 태양광 집열기

ISO 9001 품질 경영

ISO 14001 환경 경영

ISO 45001 산업 안전 및 보건

솔라 키마크 인증

솔라 키마크 인증

공기 태양광 집열기

평판 태양광 집열기

PVT 태양광 시스템

태양열 온수기

진공관 태양광 집열기

미래를 이끄는 청정 에너지

우리의 핵심 강점

태양광 통합

117개 이상 특허

연구 파트너

SOLETKS – 글로벌 고객을 위한 최고의 선택

함께 연결하기

EFPC Series –
Redefining Solar Thermal Performance

Soletks EFPC Series Large-Scale
Flat Plate Collector