============================================================ TITLE: 24W SemiFlex Solar Panel with Built-In Charge Controller for Thermo King Precedent TRU (R3-7F13.7VTK) TYPE: article VERSION: 2 VERSION_ID: 103aa900-3ee0-4473-9bc6-410fb25a0e79 GENERATED_AT: 2026-06-15T16:57:16.250Z SUMMARY: Maintain your reefer battery voltage during extended off cycles, increase average battery lifetime, and reduce TRU diesel fuel usage. AUTHOR: reducing jumpstarts READING TIME: 5 min WORD COUNT: 899 KEYWORDS: 24W SemiFlex Solar Panel with Built, Product Details:, Kit Options, IV Curve SOURCE URL: https://www.powerfilmsolar.com/products/24w-semiflex-solar-panel-with-built-in-charge-controller-for-thermo-king-precedent-tru ============================================================ KEY TAKEAWAYS: * Product Details: * Kit Options * Benefits: * IV Curve 24W SemiFlex Solar Panel with Built-In Charge Controller for Thermo King Precedent TRU (R3-7F13.7VTK) Applications: TRU Battery management for Thermo King Precedent. Specifications: Panel output to PowerBoost Built-In Charge Controller Nominally 24W PowerBoost Built-In Charge Controller Output to Battery Charges 12V battery (flooded and AGM) Charging voltage 13.8V float, 14.5V max Charging efficiency 88-91% Effective power to battery 21.1W  Current to the battery 1.5A - 2.0A (depending on battery voltage). ### Applications: * TRU Battery management for Thermo King Precedent. ### Specifications: * Panel output to PowerBoost Built-In Charge Controller Nominally 24W Panel output to PowerBoost Built-In Charge Controller * Nominally 24W * PowerBoost Built-In Charge Controller Output to Battery Charges 12V battery (flooded and AGM) Charging voltage 13.8V float, 14.5V max Charging efficiency 88-91% Effective power to battery 21.1W  Current to the battery 1.5A - 2.0A (depending on battery voltage). PowerBoost Built-In Charge Controller Output to Battery * Charges 12V battery (flooded and AGM) * Charging voltage 13.8V float, 14.5V max * Charging efficiency 88-91% * Effective power to battery 21.1W * Current to the battery 1.5A - 2.0A (depending on battery voltage). ## Product Details: * Description Keep your fleet running smoothly with the 24W SemiFlex Solar Panel, designed for commercial transportation. This maintenance-free solution supports TRU batteries, helping fleet managers prevent starting battery failures and reduce downtime. The Integrated PowerBoost Charge Controller maximizes solar output for 12V battery systems, extending battery life, preventing overcharging, and reducing maintenance expenses. The panel attaches easily to the metal frame of the TRU with four self-tapping screws. Older Thermo King units may need rubber feet as spacers between the panel and metal frame to avoid height obstructions. (Screws and spacers are not included). The 24W SemiFlex Solar Panel helps fleets stay on schedule by reducing jumpstarts, extending battery life, and cutting maintenance costs—improving reliability, efficiency, and overall performance. Learn more about the benefits of this panel and solar in general in The Ultimate Guide to Solar Panels for Transportation Refrigeration Units: Boosting Efficiency, Reliability, and Savings Kit Options 15ft. Wiring Harness Kit (CTK-TK-24-15): 24W SemiFlex Solar Panel with Built-In Charge Controller for Thermo King Precedent TRU 15ft. Wiring Harness Benefits: Built-In PowerBoost Charge Controller for optimized charging and battery safety Rugged, self-cleaning surface High-efficiency Maxeon cells for maximum power output Designed, engineered and assembled in the USA  Tested to meet or exceed performance standards IV Curve #### Description Keep your fleet running smoothly with the 24W SemiFlex Solar Panel, designed for commercial transportation. This maintenance-free solution supports TRU batteries, helping fleet managers prevent starting battery failures and reduce downtime. The Integrated PowerBoost Charge Controller maximizes solar output for 12V battery systems, extending battery life, preventing overcharging, and reducing maintenance expenses. The panel attaches easily to the metal frame of the TRU with four self-tapping screws. Older Thermo King units may need rubber feet as spacers between the panel and metal frame to avoid height obstructions. (Screws and spacers are not included). The 24W SemiFlex Solar Panel helps fleets stay on schedule by reducing jumpstarts, extending battery life, and cutting maintenance costs—improving reliability, efficiency, and overall performance. Learn more about the benefits of this panel and solar in general in The Ultimate Guide to Solar Panels for Transportation Refrigeration Units: Boosting Efficiency, Reliability, and Savings ## Kit Options ### 15ft. Wiring Harness Kit (CTK-TK-24-15): * 15ft. Wiring Harness * Built-In PowerBoost Charge Controller for optimized charging and battery safety * Rugged, self-cleaning surface * High-efficiency Maxeon cells for maximum power output * Designed, engineered and assembled in the USA * Tested to meet or exceed performance standards * Important Notes All connections must be solar positive (red) to battery positive and solar negative (black or blue) to battery negative. Reversing can damage the solar panel. Consult your battery manufacturer if you have questions about the specifications of your battery. #### Important Notes All connections must be solar positive (red) to battery positive and solar negative (black or blue) to battery negative. Reversing can damage the solar panel. Consult your battery manufacturer if you have questions about the specifications of your battery. * Specifications Power: Panel output to PowerBoost Built-In Charge Controller Nominally 24W PowerBoost Built-In Charge Controller Output to Battery Charges 12V battery (flooded and AGM) Charging voltage 13.8V float, 14.5V max Charging efficiency 88-91% Effective power to battery 21.1W  Current 1.5A - 2.0A (depending on battery voltage). Charge controller: Protection Reverse polarity ESD capability (AEC-Q101): human body model: class H3B: > 8 kV Reverse leakage Physical: Dimensions 22.30 x 12.97 x 0.10 (in) / 566.4 x 329.4 x 2.5 (mm) Black fiberglass backing Weight 1.9lb / 0.9kg Environmental: Temperature Coefficient Power: -0.27%/ºC Voltage: -0.236%/ºC Current: 0.058%/ºC Storage temperature: -40°C to 85°C Operating temperature: -40°C to 85°C #### Specifications * Current 1.5A - 2.0A (depending on battery voltage). ### Charge controller: * Protection Reverse polarity ESD capability (AEC-Q101): human body model: class H3B: > 8 kV Reverse leakage Protection * Reverse polarity * ESD capability (AEC-Q101): human body model: class H3B: > 8 kV * Reverse leakage * Dimensions 22.30 x 12.97 x 0.10 (in) / 566.4 x 329.4 x 2.5 (mm) Black fiberglass backing Dimensions * 22.30 x 12.97 x 0.10 (in) / 566.4 x 329.4 x 2.5 (mm) * Black fiberglass backing * Weight 1.9lb / 0.9kg * 1.9lb / 0.9kg ### Environmental: * Temperature Coefficient Power: -0.27%/ºC Temperature Coefficient * Power: -0.27%/ºC * Voltage: -0.236%/ºC Current: 0.058%/ºC Storage temperature: -40°C to 85°C Operating temperature: -40°C to 85°C * Voltage: -0.236%/ºC Current: 0.058%/ºC * Voltage: -0.236%/ºC * Current: 0.058%/ºC * Storage temperature: -40°C to 85°C * Operating temperature: -40°C to 85°C * Resources Instructions Spec Sheet FAQs Instructions Spec Sheet ------------------------------------------------------------ ABOUT THIS CONTENT ------------------------------------------------------------ Source: https://www.powerfilmsolar.com/products/24w-semiflex-solar-panel-with-built-in-charge-controller-for-thermo-king-precedent-tru Author: reducing jumpstarts This content is provided for informational purposes. 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