---
title: "The Future of Solar Testing: MBJ Solutions Advances Tandem Module Measurement"
description: As global solar module prices continue to fall—now dropping below USD 0.10 per watt peak—pressure on European solar manufacturing intensifies. In this challenging economic environment, next-generation technologies such as perovskite and tandem solar cells offer a pathway toward competitive, high-efficiency renewable solutions.
---

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# [The Future of Solar Testing: MBJ Solutions Advances Tandem Module Measurement](https://pes.eu.com/digital-blog/the-future-of-solar-testing-mbj-solutions-advances-tandem-module-measurement)

 Written by [Negin Hashemi](https://pes.eu.com/digital-blog/author/negin-hashemi) | Feb 1, 2026 1:13:22 PM

As global solar module prices continue to fall—now dropping below USD 0.10 per watt peak—pressure on European solar manufacturing intensifies. In this challenging economic environment, next-generation technologies such as **perovskite and tandem solar cells** offer a pathway toward competitive, high-efficiency renewable solutions.

To support this transition, **MBJ Solutions** has introduced the **MBJ Sunlike Lab**, a cutting-edge LED solar simulator designed for laboratory testing of new-generation modules. Its capabilities align with the complex demands of perovskite-silicon tandem solar cell development, offering precision, flexibility, and long-term reliability.

### Why Perovskite and Tandem Cells Matter

- **Higher efficiency potential** than conventional silicon cells
- **Lower manufacturing costs** through low-temperature, energy-efficient processes
- **Tandem structure** enables better light utilization across layers, increasing power output per unit area
- **Strategic advantage** for Europe’s solar industry, improving cost competitiveness and technology leadership

**Challenges to address:**

- Long-term stability of perovskite materials
- Scalable, repeatable production techniques
- Accurate, reproducible power measurements during development

### The Measurement Challenge: Why Traditional Simulators Fall Short

Perovskite and tandem cells require a **precisely controlled spectrum** and **continuous light exposure** to stabilize and evaluate performance. Traditional xenon-based flash simulators present several limitations:

- Short flash durations (up to 100 ms)
- Inability to provide continuous light
- Poor thermal management under sustained operation

### Introducing the MBJ Sunlike Lab: Tailored for Perovskite and Tandem Modules

MBJ Solutions’ **Sunlike Lab simulator** leverages LED technology to meet the advanced testing needs of the new solar generation.

### Key Technical Features

- **Pulse duration** of 500 ms and **continuous light mode** for preconditioning
- **32 individually adjustable LED channels** per board for fine-tuned spectral control
- **Spectral match** close to AM1.5G, achieving a **spectral deviation (SPD)** of just 11.9% and **spectral coverage (SPC)** of 100% (300–1200 nm)
- **Classification A+A+A+** in accordance with **IEC 60904-9:2020**
- **Thermal control system** managing up to 20 kW of heat, ensuring LED temperature stability and spectrum integrity
- **Z-factor compliance** within 1.00 ± 0.01, avoiding the need for spectral corrections—critical for tandem module accuracy
- **Excellent stability metrics**:

### Integrated Capabilities for Advanced Research

The Sunlike Lab goes beyond power measurement, offering:

- **Electroluminescence (EL) imaging** with dual-filter cameras for independent evaluation of silicon and perovskite cells
- **Spectral responsivity (SR) measurement** for sub-cell current derivation
- **Thermal chamber** supporting module testing from 15 °C to 75 °C
- **Compatible with modules up to 2500 mm x 1400 mm**

### Compliance with Emerging Standards

The system is fully aligned with:

- **IEC 60904-1-1:2017** for multi-junction PV device testing
- **IEC 60904-9:2020** for simulator classification and spectral quality
- Incorporates **Z-factor methodology** to ensure test accuracy for tandem devices

### Supporting European Innovation in Solar

MBJ Solutions, supported by its LED technology subsidiary MBJ Imaging, continues to serve a growing base of customers with over 100 solar simulators already delivered. The **Sunlike Lab** represents the next step in supporting Europe’s competitiveness in solar technology R&D.

As perovskite-silicon tandem modules inch closer to commercial production, the MBJ Sunlike Lab provides the necessary infrastructure for:

- **Research institutions and labs** working on next-gen modules
- **Module manufacturers** aiming for high-efficiency product pipelines
- **Standards-compliant testing environments**

### Conclusion

MBJ Solutions’ **Sunlike Lab** provides a complete platform for the accurate testing and development of perovskite and tandem solar modules. Its near-perfect spectrum, stable performance, and integrated diagnostics position it as a vital tool in the next chapter of solar innovation.

🔗 **Discover more:** [www.mbj-solutions.com/en](http://www.mbj-solutions.com/en)

[View full post](https://pes.eu.com/digital-blog/the-future-of-solar-testing-mbj-solutions-advances-tandem-module-measurement)

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