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

Componente	Especificação	Parâmetro
Absorvedor	Revestimento	Titânio Azul
	Estrutura	Prato do Tubo
	Absorção	95% ±2%@AM1.5
	Emissividade	5% ±2%@80°C
Tubo de Cabeçalho	Material e Tamanho	Cobre φ42×1,5 mm
Estrutura	Tamanho	5960×2520×166 mm
	Material	Alumínio de alta qualidade 6063-T5
	Superfície	Branco fosco
Tampa de cobertura	Material	Vidro temperado de alta transparência e branco super branco de baixo ferro
Tampa de cobertura	Transmissão	≥91,5%
Inferior	Material	Folha galvanizada de 0,4 mm
Isolamento	Inferior	Lã de vidro de 80 mm
Isolamento	Lado	Fibra de cartão de 30 mm
Conector	Tamanho & Quantidade	DN40, 2 peças

Solar de Alta Eficiência Coletores Térmicos

Solar em Grande Escala Coletor Térmico

Principais Características

Revestimento BLUE CORE™ PVD

Vidro AR Duplo

Soldagem a Laser de Precisão

Conector HTC sem Ferramentas

Pronto para Condições Extremas

Histórico Comprovado

Aplicações

Especificações Técnicas

Design & Confiabilidade

Global Excelência em Energia Solar

Aquecimento Solar Centralizado para a Cidade do Condado de Saga em Shigatse

Projeto de bomba de calor TPV Pro+ da Escola de Tianjin

Sistema de Água Quente do Hotel da Cúpula da APEC

Projeto de Água Quente na Villa do Resort da Flórida

Projeto de Água Quente na Igreja de Harz

Certificações Globais & Garantia de Qualidade

Certificado de Relatório de Teste

Certificação Solar Keymark

ISO 9001 Gestão da Qualidade

ISO 14001 Gestão Ambiental

ISO 45001 Saúde e Segurança no Trabalho

Coletor Solar de Ar

Coletor Solar de Placa Plana

Sistema Solar PVT

Certificação Solar Keymark

Aquecedor Solar de Água

Coletor Solar de Tubo de Vácuo

ISO 9001 Gestão da Qualidade

ISO 14001 Gestão Ambiental

ISO 45001 Saúde e Segurança no Trabalho

Certificação Solar Keymark

Certificação Solar Keymark

Coletor Solar de Ar

Coletor Solar de Placa Plana

Sistema Solar PVT

Aquecedor Solar de Água

Coletor Solar de Tubo de Vácuo

Liderando o Futuro de Energia Limpa

Nossas Forças Principais

Integração Solar

117+ Patentes

Research Partners

SOLETKS – A Primeira Opção para Clientes Globais

Vamos Conectar

Solar de Alta Eficiência
Coletores Térmicos

Solar em Grande Escala
Coletor Térmico