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Dual Energy Harvesting Technology

Tấm pin mặt trời PVT

SOLETKS PVT (Photovoltaic-Thermal) Solar Panels integrate photovoltaic electricity generation and thermal energy collection in one advanced system. By utilizing both light and heat from the sun, they maximize total energy output and overall efficiency — ideal for buildings, industries, and projects seeking comprehensive clean-energy solutions.

Hybrid
PVT-E Type Solar Panel

PVT-E Type

A hybrid photovoltaic-thermal module optimized for efficient electricity generation with auxiliary heat recovery.

It delivers excellent electrical performance and consistent hot water output, ideal for residential rooftops and commercial systems.

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Tập trung nhiệt
PVT-T Type Solar Panel

PVT-T Type

A thermal-focused hybrid panel emphasizing high heat capture while maintaining strong power generation capacity.

Suitable for industrial or large-scale energy systems that require stable heat supply alongside electrical generation.

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TP/V Pro Type Solar Panel

TP/V Pro Type

The next-generation professional PVT system featuring upgraded thermal management and enhanced cooling technology.

It achieves higher electrical conversion efficiency, longer service life, and superior overall energy yield — setting a new benchmark for integrated solar performance.

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PVT Hybrid Solar Systems — One Panel, Two Energies

Simultaneous power and heat from the same surface.

When roof space is limited, PVT gives you the maximum energy per square meter.

1

What is a PVT System?

PVT (Photovoltaic-Thermal) is a hybrid solar panel that produces electricity and heat at the same time from a single module:

Front Side

Photovoltaic cells generate electricity

Rear Side

Heat exchanger recovers thermal energy for hot water, heating, pools or processes

Instead of installing one array for PV and another for solar thermal, PVT merges both into one integrated system.

Same roof. Same mounting. Double output.

2

Why PVT Instead of Separate PV + Thermal?

Maximum Energy per m² of Roof Area

For many projects, roof or façade area is the main limitation. PVT allows you to:

  • Produce kWh of electricity + kWh of heat on the same square meter
  • Reach much higher total solar yield compared with PV alone
Ideal for:
  • Apartment buildings
  • Hotels, hospitals, nursing homes
  • Offices & mixed-use buildings
  • Industrial/food plants with hot water demand

Better PV Efficiency Through Active Cooling

PV efficiency drops when cells are hot. The thermal side of a PVT module removes heat from the PV cells, which can:

  • Improve electrical efficiency compared with the same PV module without cooling
  • Increase annual PV output, especially in hot climates or on dark roofs

Lower System Cost vs Two Separate Systems

With PVT, you share:

  • Mounting structure
  • Piping/conduits routing
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Space heating or underfloor heating support
Electricity for building services
Works seamlessly with BIPV/BIPVT façade concepts
Supports net-zero and energy-positive building strategies
Reduces operational energy consumption while improving ESG and green-building ratings
4

How a PVT System Works

A Soletks PVT system is built as a fully integrated hybrid solution that produces both electricity and thermal energy from the same surface.

1

PVT Hybrid Panels

Advanced dual-function solar modules combining photovoltaic and thermal technologies.

  • High-efficiency photovoltaic cells on the front side
  • Thermal absorber and fluid channels on the rear
  • Multiple insulation layers to minimize heat losses and ensure long-term durability
2

Hydraulic Circuit & Heat Exchanger

Complete thermal management system for optimal heat transfer and distribution.

  • Pumping station with flow and temperature control
  • Heat exchanger for transferring energy to DHW tank, buffer tank, pool, or heating loop
  • Complete safety group with valves, sensors, and expansion vessel
3

Hot Water & Buffer Tanks

Thermal energy storage solutions for continuous hot water availability.

  • Domestic hot water (DHW) storage tanks
  • Buffer tanks for heating or industrial process circuits
  • Easy integration with heat pumps, boilers, or hybrid energy systems
4

Electrical Side

Professional PV system components for maximum electrical efficiency.

  • PV string configuration with high-quality DC cabling
  • String or centralized inverters for maximum conversion efficiency
  • Smart monitoring and metering for both electricity and heat production
5

Control & Monitoring

Intelligent system management for optimized performance and energy savings.

  • Weather, irradiation, and temperature sensors
  • Intelligent prioritization between PV, thermal output, heat pump, and backup sources
  • Online monitoring of electrical kWh, thermal kWh, energy savings, and CO₂ reduction
5

PVT + Heat Pump = High-Performance Hybrid Plant

Combining PVT panels with a heat pump creates one of the most efficient renewable energy systems available today.

How the Hybrid Works

  • The PVT panel provides low-temperature heat to the heat pump's evaporator or buffer tank
  • The PV side supplies part of the electricity required by the compressor

cURL Too many subrequests. A significantly higher overall COP and superior seasonal performance

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1

Thermal Circuit Designed Around PV Physics

Uniform heat extraction is essential for reliable PVT operation. Soletks uses full-coverage aluminum absorber plates with micro-channel heat exchangers to prevent localized overheating.

Unlike spot-flow or partial-contact designs, our geometry eliminates thermal gradients—the root cause of:

  • Cell fatigue
  • Micro-cracking
  • Long-term electrical yield decay
2

Electrical Yield Preserved, Not Sacrificed

A PVT panel that loses 20–30% PV output is unacceptable. Our architecture extracts heat below the PV operating zone, ensuring:

  • No shadowing
  • No hydraulic deformation
  • No clamp hotspots
  • No solder-joint fatigue

Field data confirms 90–95% of pure PV output, while also generating thermal gain.

3

Real Thermal Performance — Not Cosmetic Water-Cooling

Many "PVT" designs rely on laminated capillaries or shallow snake tubes that only cool panels under mild conditions and then stagnate or boil.

Soletks uses:

Technology:
  • High thermal conductivity plate (k > 200 W/m·K)
  • Optimized fluid volume
  • Controlled ΔT extraction strategy
This ensures:
  • Stable heat output in summer
  • Predictable return temperatures for heat pumps or storage
  • No boiling, stagnation, or thermal runaway
4

Structural Integrity for Long Service Life

PVT panels endure UV + thermal cycling, moisture ingress, corrosion, mechanical stress, and high stagnation temperatures.

Soletks eliminates common failure points:

  • No vacuum tubes
  • No plastic manifolds
  • No adhesive-based thermal paths
  • No uncontrolled stagnation risk

Panels use aluminum + EPDM sealing with controlled drainage to prevent moisture accumulation and corrosion.

5

System-Level Integration — Not Just Selling Panels

Soletks designs complete PVT systems, not loose components.

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  • Buffer + consumption tank configuration
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cURL Too many subrequests. Heat kWh thermal only High Very competitive for DHW Medium
PVT hybrid Combined kWh electric + kWh thermal Very high total Often lowest per kWh (combined) Higher but integrated

PVT is not replacing classic PV or solar thermal in every case.
But when roof area is limited and there is simultaneous demand for power and heat, PVT is often the most efficient and compact choice.

🔥

PVT vs PV ROI — Realistic Regional Examples

Below is a practical B2B comparison, based on typical commercial buildings (hotel / student housing / clinic), where electricity + hot water demand coexist. It is not theoretical marketing—it reflects real energy prices, hot water loads, and panel performance.

  • Roof constraint: 80–120 m² usable area
  • Electric tariff: local commercial rate
  • DHW demand: 1–4 tons/day @ 45–55°C
  • PVT output: 1 unit delivers electricity + heat
  • PV output: electricity only
🔵

Europe (EU)

High electricity cost + heating demand = PVT perfect

👉 Assumptions

  • Electricity: €0.18–0.28/kWh (commercial)
  • Gas / heating cost: €0.07–0.12/kWh
  • Good solar irradiation: 950–1,350 kWh/m²·year
  • Hot water: constant demand (hotels / hospitals / residences)
System Annual Energy Yield (per m²) Economic Result Thời Gian Hoàn Vốn
cURL Too many subrequests. 180–220 kWh electric Good, but limited by roof 5–8 yrs
PVT hybrid 180–220 kWh electric + 350–500 kWh thermal Thermal replaces expensive gas/electric heat 2.8–4.5 yrs

Example (France 80–100 m² hotel):

PV-only: ~18–22 kWp → 20–35 kWh/day → Payback ~6 yrs

cURL Too many subrequests. same roof → electricity + 1,500–2,500 L/day DHW → Payback ~3–3.8 yrs

🟠

Middle East & North Africa (MENA)

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🟡

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PV

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PVT

~500–900 kWh combined
(electric + thermal)

PVT = PV output + 1–2× extra heat yield.
And unlike PV spillover: Thermal energy is always absorbed by DHW (hospitals/hotels/industry). Buffer tanks store excess heat → no curtailment.
This is why ROI accelerates.

PVT: The Most Cost-Effective Renewable Heat Source for Europe

PVT delivers the same principle — naturally and continuously.
Heating Configuration Typical COP Relative Heat Cost
Air-source heat pump ~3 Higher
Water-source heat pump ~5 Lower
Water-source + waste heat ~6 Thấp nhất
PVT-assisted heat pump 5–6+ Thấp nhất

Why PVT wins: PVT panels provide pre-heated water to the heat pump, dramatically improving COP while simultaneously generating electricity. This dual benefit makes PVT-assisted systems the most economically efficient renewable heating solution in Europe's climate.

8

Typical Questions (FAQ)

Get answers to the most common questions about PVT hybrid solar systems

Q1 When does PVT make more sense than normal PV?

Whenever you have:

  • Significant and regular hot water or heating demand
  • Limited roof area
  • Medium to high energy prices

…PVT will generally deliver a better total energy yield per m² than PV alone.

Q2 What temperatures can Soletks PVT deliver?

For most projects, we design for 35–70°C:

  • Domestic hot water
  • Low-temperature heating
  • Pools and process pre-heating

Higher temperatures may be possible with specific configurations.

Q3 Does PVT work in cold climates?

Yes.

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Địa chỉ

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Công ty

Shandong Soletks Solar Technology Co., Ltd.

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