Question 1

Key Features

Accepted Answer

Advanced technology and proven performance for demanding applications

Question 2

Applications

Accepted Answer

Ideal for medium-temperature solar solutions across diverse industries and residential sectors:

Question 3

Technical Specifications

Accepted Answer

Detailed technical parameters and component specifications

Question 4

Design & Reliability

Optimized bracket design tested for 14-level wind loads (42–45 m/s).

Internal flow channels and high-pressure interfaces standardized for 16 Bar test pressure.

Engineered for safe, long-term operation and simplified maintenance.

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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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.project-featured::before {
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    position: absolute;
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.project-featured:hover {
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.project-featured:hover::before {
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.featured-image {
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.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
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.project-featured:hover .featured-image img {
    transform: scale(1.06);
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.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    padding: 6px 16px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
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}

.featured-content {
    padding: 28px;
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.featured-content h3 {
    font-size: 24px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 16px;
    line-height: 1.3;
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.meta-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 16px;
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.meta-tags span {
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
    padding: 4px 12px;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
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.featured-content p {
    font-size: 15px;
    line-height: 1.7;
    color: #64748b;
    margin-bottom: 20px;
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.achievements-list {
    display: flex;
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    gap: 8px;
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.achievement {
    font-size: 13px;
    color: #1e293b;
    padding: 10px 14px;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
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    border-radius: 4px;
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.btn-primary, .btn-secondary {
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    border-radius: 8px;
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    overflow: hidden;
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.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
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.btn-primary:hover {
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.btn-small svg {
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.project-card {
    background: white;
    border-radius: 12px;
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.card-content {
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.card-content h4 {
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    line-height: 1.6;
    color: #64748b;
    margin-bottom: 16px;
    flex: 1;
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/* Card Actions */
.card-actions {
    display: flex;
    gap: 8px;
    margin-top: auto;
}

.card-actions .btn-primary,
.card-actions .btn-secondary {
    flex: 1;
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    .container {
        padding: 0 30px;
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    .section-title {
        font-size: 38px;
    }
    
    .projects-layout {
        gap: 28px;
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    .featured-image {
        height: 260px;
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    .card-image {
        height: 140px;
    }
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@media (max-width: 1024px) {
    .projects-layout {
        grid-template-columns: 1fr;
        gap: 32px;
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    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
        gap: 20px;
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    .featured-image {
        height: 300px;
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    .card-image {
        height: 180px;
    }
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    .projects-showcase {
        padding: 60px 0;
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    .container {
        padding: 0 20px;
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    .section-header {
        margin-bottom: 40px;
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    .section-title {
        font-size: 32px;
    }
    
    .section-description {
        font-size: 16px;
    }
    
    .featured-image {
        height: 240px;
    }
    
    .featured-content {
        padding: 24px;
    }
    
    .featured-content h3 {
        font-size: 21px;
    }
    
    .card-content h4 {
        font-size: 16px;
    }
    
    .featured-actions {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .card-actions {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .card-image {
        height: 200px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 28px;
    }
    
    .featured-image {
        height: 220px;
    }
    
    .featured-content h3 {
        font-size: 19px;
    }
}

.certifications-section {
      width: 100%;
      background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }

.certifications-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, #e2e8f0 50%, transparent);
    }

.certifications-container {
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 40px;
    }

/* Section Header */
    .certifications-header {
      text-align: center;
      margin-bottom: 60px;
    }

.certifications-label {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: #3b82f6;
      margin-bottom: 15px;
      padding: 8px 20px;
      background: rgba(59, 130, 246, 0.1);
      border-radius: 25px;
      border: 1px solid rgba(59, 130, 246, 0.2);
    }

.certifications-title {
      font-size: 44px;
      font-weight: 800;
      color: #1e293b;
      margin: 0 0 20px 0;
      line-height: 1.2;
    }

.certifications-title .highlight {
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

.certifications-description {
      font-size: 17px;
      line-height: 1.7;
      color: #64748b;
      max-width: 900px;
      margin: 0 auto;
    }

/* Tabs Navigation */
    .cert-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

.cert-tab {
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 600;
      color: #64748b;
      background: white;
      border: 2px solid #e2e8f0;
      border-radius: 50px;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

.cert-tab::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
      transition: left 0.5s ease;
    }

.cert-tab:hover {
      border-color: #3b82f6;
      color: #3b82f6;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
    }

.cert-tab:hover::before {
      left: 100%;
    }

.cert-tab.active {
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: white;
      border-color: #3b82f6;
      box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
    }

/* Tab Content */
    .cert-tab-content {
      display: none;
      animation: fadeIn 0.5s ease;
    }

.cert-tab-content.active {
      display: block;
    }

@keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(20px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

/* Certificates Grid - 4 columns */
    .certificates-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 25px;
      margin-bottom: 40px;
    }

.certificate-card {
      background: white;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
      transition: all 0.4s ease;
      cursor: pointer;
      position: relative;
    }

.certificate-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #3b82f6, #2563eb);
      transform: scaleX(0);
      transition: transform 0.4s ease;
    }

.certificate-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 40px rgba(59, 130, 246, 0.2);
    }

.certificate-card:hover::before {
      transform: scaleX(1);
    }

.certificate-image {
      width: 100%;
      height: 280px;
      overflow: hidden;
      background: #f1f5f9;
      position: relative;
    }

.certificate-image img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 15px;
      transition: transform 0.5s ease;
    }

.certificate-card:hover .certificate-image img {
      transform: scale(1.08);
    }

.certificate-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: white;
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    }

.certificate-info {
      padding: 20px;
    }

.certificate-name {
      font-size: 16px;
      font-weight: 700;
      color: #1e293b;
      margin: 0 0 6px 0;
      line-height: 1.4;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

.certificate-type {
      font-size: 13px;
      color: #64748b;
      margin: 0;
    }

/* Lightbox Modal */
    .lightbox-modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.95);
      z-index: 10000;
      justify-content: center;
      align-items: center;
      padding: 40px;
      animation: lightboxFadeIn 0.3s ease;
    }

.lightbox-modal.active {
      display: flex;
    }

@keyframes lightboxFadeIn {
      from {
        opacity: 0;
      }
      to {
        opacity: 1;
      }
    }

.lightbox-content {
      position: relative;
      max-width: 95%;
      max-height: 95%;
      display: flex;
      justify-content: center;
      align-items: center;
      animation: zoomIn 0.4s ease;
    }

@keyframes zoomIn {
      from {
        transform: scale(0.8);
        opacity: 0;
      }
      to {
        transform: scale(1);
        opacity: 1;
      }
    }

.lightbox-content img {
      max-width: 100%;
      max-height: 90vh;
      width: auto;
      height: auto;
      object-fit: contain;
      border-radius: 8px;
      box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
    }

.lightbox-close {
      position: fixed;
      top: 30px;
      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;
      transition: all 0.3s ease;
      z-index: 10001;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

.lightbox-close:hover {
      background: white;
      transform: rotate(90deg) scale(1.1);
    }

.lightbox-close svg {
      width: 24px;
      height: 24px;
      stroke: #1e293b;
      stroke-width: 2.5;
    }

.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;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
      backdrop-filter: blur(10px);
    }

/* Responsive Design */
    @media (max-width: 1200px) {
      .certificates-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
      }

.certificate-image {
        height: 260px;
      }
    }

@media (max-width: 992px) {
      .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }

.certificate-image {
        height: 280px;
      }
    }

@media (max-width: 768px) {
      .certifications-section {
        padding: 60px 0;
      }

.certifications-container {
        padding: 0 20px;
      }

.certifications-title {
        font-size: 36px;
      }

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

.cert-tabs {
        gap: 8px;
      }

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

.certificate-image {
        height: 240px;
      }

.lightbox-modal {
        padding: 20px;
      }

.lightbox-close {
        top: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
      }

.lightbox-info {
        bottom: 20px;
        font-size: 13px;
        padding: 10px 20px;
      }
    }

@media (max-width: 576px) {
      .certificates-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

.certificate-image {
        height: 300px;
      }

.certifications-title {
        font-size: 28px;
      }

.lightbox-content img {
        max-height: 80vh;
      }
    }

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 5

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 6

ISO 9001 Quality Management

Accepted Answer

International Organization for Standardization

Question 7

ISO 14001 Environmental Management

Accepted Answer

International Organization for Standardization

Question 8

ISO 45001 Occupational Health & Safety

Accepted Answer

International Organization for Standardization

Question 9

Air Solar Collector

Accepted Answer

Product Certification

Question 10

Flat Plate Solar Collector

Accepted Answer

Product Certification

Question 11

PVT Solar System

Accepted Answer

Product Certification

Question 12

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 13

Solar Water Heater

Accepted Answer

Product Certification

Question 14

Vacuum Tube Solar Collector

Accepted Answer

Product Certification

Question 15

ISO 9001 Quality Management

Accepted Answer

International Organization for Standardization

Question 16

ISO 14001 Environmental Management

Accepted Answer

International Organization for Standardization

Question 17

ISO 45001 Occupational Health & Safety

Accepted Answer

International Organization for Standardization

Question 18

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 19

Solar Keymark Certification

Accepted Answer

European Quality Standard

Question 20

Air Solar Collector

Accepted Answer

Product Certification

Question 21

Flat Plate Solar Collector

Accepted Answer

Product Certification

Question 22

PVT Solar System

Accepted Answer

Product Certification

Question 23

Solar Water Heater

Accepted Answer

Product Certification

Question 24

Vacuum Tube Solar Collector

Accepted Answer

Product Certification

Question 25

Solar Integration

Accepted Answer

Advanced flat-plate collector technology maximizing energy efficiency

Question 26

117+ Patents

Accepted Answer

Cutting-edge innovation portfolio protecting proprietary technologies

Question 27

Research Partners

Accepted Answer

Strategic collaboration with leading institutions worldwide

Component	مشخصات	پارامتر
Absorber	Coating	Blue Titanium
	Structure	Tube Sheet
	Absorption	95% ±2%@AM1.5
	Emittance	5% ±2%@80°C
Header Pipe	Material & Size	Copper φ42×1.5 mm
Frame	Size	5960×2520×166 mm
	Material	High-grade Aluminum 6063-T5
	Surface	Frosted white
Cover Plate	Material	Low-iron super white tempered glass
Cover Plate	Transmittance	≥91.5%
Bottom	Material	Galvanized sheet 0.4 mm
عایق‌بندی	Bottom	Glass wool 80 mm
عایق‌بندی	Side	Carton fiber 30 mm
Connector	Size & Qty	DN40, 2 pcs

High-Efficiency Solar Thermal Collectors

Large-Scale Solar Thermal Collector

ویژگی‌های کلیدی

BLUE CORE™ PVD Coating

Double AR Glass

Precision Laser Welding

Tool-Free HTC Connector

Extreme Condition Ready

Proven Track Record

cURL Too many subrequests.

Technical Specifications

Design & Reliability

جهانی برتری در انرژی خورشیدی

گرمایش خورشیدی متمرکز مرکزی برای شهر شهرستان ساگا در شهر شگتسه

پروژه پمپ حرارتی مدرسه تیانجین TPV Pro+

سیستم آب گرم هتل اجلاس سران APEC

پروژه آب گرم ویلایی تفریحی فلوریدا

پروژه آب گرم کلیسای هرز

گواهینامه‌های جهانی و ضمانت کیفیت

گواهی گزارش آزمایش

گواهینامه کلیدخورشیدی کاورمک

مدیریت کیفیت ISO 9001

مدیریت زیست‌محیطی ISO 14001

سلامت و ایمنی شغلی ISO 45001

مبدل هوای خورشیدی

مبدل حرارتی صفحه تخت خورشیدی

سیستم خورشیدی PVT

گواهینامه کلیدخورشیدی کاورمک

آبگرم‌کن خورشیدی

مبدل خورشیدی لوله خلاء

مدیریت کیفیت ISO 9001

مدیریت زیست‌محیطی ISO 14001

سلامت و ایمنی شغلی ISO 45001

گواهینامه کلیدخورشیدی کاورمک

گواهینامه کلیدخورشیدی کاورمک

مبدل هوای خورشیدی

مبدل حرارتی صفحه تخت خورشیدی

سیستم خورشیدی PVT

آبگرم‌کن خورشیدی

مبدل خورشیدی لوله خلاء

پیشرو در آینده انرژی پاک

نقاط قوت اصلی ما

ادغام خورشیدی

117+ اختراع ثبت‌شده

همکاران تحقیقاتی

سولتکس – انتخاب اول مشتریان جهانی

بیایید ارتباط برقرار کنیم

High-Efficiency Solar
Thermal Collectors

Large-Scale Solar
Thermal Collector