Tongwei unveils TNC 2.0 FULLX G12R-48 rooftop module: 24.5% efficiency and up to 490 W in a compact form

# What was announced Tongwei launched the TNC 2.0 FULLX G12R-48 rooftop solar module at Solar & Storage Live UK. The module uses a 48-cell, mainstream roof-friendly format (1762 × 1134 × 30 mm) and reaches up to 490 W with an efficiency of 24.5%.

# Why this matters for rooftop projects The module is aimed at situations where roof area, mounting conditions, and appearance matter. Tongwei highlights three practical advantages:

• Higher nameplate power per module (30 W more than conventional TOPCon modules) to increase installed capacity on the same roof area.
• Improved energy yield per watt in field tests, which can raise real-world generation without changing array footprint.
• Aesthetic options (full black and black frame) to fit different residential or commercial rooftop preferences.

• Average per-watt generation was 3.3% higher than conventional BC modules in the Tongwei Yancheng Test Base comparison.
• Low-light generation advantage peaked at 12.32% during early morning and late afternoon, periods that can align with higher time-of-use electricity prices.
• Equivalent full-load hours in the tested scenario: 447.56 hours for TNC versus 433.27 hours for conventional BC modules (about a 3.3% uplift).
• Time-of-use electricity calculations in the test scenario produced approximately €0.03 additional revenue per day.

# Adaptability: tilt and soiling behavior Tongwei emphasizes adaptability under realistic rooftop conditions:

• In Germany-based simulations, low-light energy loss related to roof tilt was 0.38% for TNC versus 0.96% for conventional BC modules. Tongwei reports that conventional BC modules were over 2.5 times more sensitive to tilt in that scenario.

• Soiling: TNC had lower fractional power loss compared with conventional BC modules by 0.40 percentage points (light soiling), 0.73 points (moderate), and 0.99 points (heavy).

# Cost and system-level implications Tongwei presents a CAPEX argument: because each module delivers more power and more energy per watt, a standard 12-module rooftop system using TNC 2.0 FULLX G12R-48 would reduce initial module investment by over €400 compared with an equivalent system using conventional BC modules in their tested scenario.

# Product options and target use cases The module comes in full black and black frame variants to meet aesthetic and configuration needs on rooftops. Tongwei positions the product for rooftop systems where limited space and variable installation conditions require a balance of high power density and resilient energy yield.

# What Tongwei did not claim here The published material reports Tongwei's field tests, simulations, and a time-of-use revenue example tied to those tests. Independent third-party certification or broader deployment results are not included in the supplied text.