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    10 Best 400 Watt Solar Panel Kit in 2026

    Updated on April 2026
    #1
    Best Choice
    RENOGY
    Renogy 400 Watt 12 Volt Premium 4 Pcs 100W Panel+40A MPPT Charge Controller+ Bluetooth Module Fuse+ Mounting Z Brackets+Adaptor Kit +Tray Cables Set,...
    20% Off
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    • Daily output of 2-2.5 kWh using high-efficiency 22.5% solar cells, with a 10-year warranty on materials and a 3-year warranty on the MPPT controller.
    • Durable construction with low-iron glass and aluminum alloy frame, designed to withstand high wind (2400Pa) and snow loads (5400Pa), includes necessary installation hardware.
    • High-performance MPPT charge controller with 99% tracking efficiency and 98% conversion efficiency, includes a temperature sensor for optimal battery charging.
    • Safety features include MPPT controller protection, overcurrent fuses, and wide-diameter cables to minimize power loss and overheating risks.
    • Bluetooth module allows remote monitoring and parameter adjustments via smartphone app, with a range of up to 82 feet (25m).
    • Maximum battery voltage capacity of 32V.
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    • Daily output of 2-2.5 kWh using high-efficiency 22.5% solar cells, with a 10-year warranty on materials and a 3-year warranty on the MPPT controller.
    • Durable construction with low-iron glass and aluminum alloy frame, designed to withstand high wind (2400Pa) and snow loads (5400Pa), includes necessary installation hardware.
    • High-performance MPPT charge controller with 99% tracking efficiency and 98% conversion efficiency, includes a temperature sensor for optimal battery charging.
    • Safety features include MPPT controller protection, overcurrent fuses, and wide-diameter cables to minimize power loss and overheating risks.
    • Bluetooth module allows remote monitoring and parameter adjustments via smartphone app, with a range of up to 82 feet (25m).
    • Maximum battery voltage capacity of 32V.
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    #2
    ECO-WORTHY
    ECO-WORTHY 400 Watt 12 Volt Premium Solar Panel Kit :4pcs 100W Solar Panel+ 40A MPPT Charge Controller+ Bluetooth Module+ Mounting Z Brackets, 400W...
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    • Produces an average of 1.6KWH of electricity daily, depending on sunlight.
    • Constructed with 100W monocrystalline cells for 21% efficiency; designed to withstand high wind and snow loads.
    • Utilizes maximum power point tracking for 99% efficiency and peak conversion efficiency of 98%, exceeding traditional systems.
    • Features pre-drilled rear shelf and 16-foot cables for straightforward installation; plug-and-play connectors simplify setup.
    • Includes BT-02 Bluetooth module for real-time monitoring of system data via mobile phone, with a range of up to 82 feet.
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    • Produces an average of 1.6KWH of electricity daily, depending on sunlight.
    • Constructed with 100W monocrystalline cells for 21% efficiency; designed to withstand high wind and snow loads.
    • Utilizes maximum power point tracking for 99% efficiency and peak conversion efficiency of 98%, exceeding traditional systems.
    • Features pre-drilled rear shelf and 16-foot cables for straightforward installation; plug-and-play connectors simplify setup.
    • Includes BT-02 Bluetooth module for real-time monitoring of system data via mobile phone, with a range of up to 82 feet.
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    #3
    Best Value
    ECO-WORTHY
    [Ultra] ECO-Worthy 12V 400W Complete Solar Panel Kit for RV Off Grid Travel Trailer : 4 * 100W Solar Panel + 40A MPPT Controller + 12V 280Ah Lithium...
    13% Off
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    • One-Stop Solar Solution: The 400W complete solar complete system generates 1600Wh of power daily and stores 3.5Kwh of power, making it the essential kit for your RV trip. This system comes with everything you need to build an off-grid solar system, no additional purchases required. It includes 4pcs 100W solar panel, 12.8V 280Ah lithium battery, 2000W inverter, 40A MPPT charge controller, monitor module and all necessary cables.
    • Say Bye To DIY:To Save You The Trouble Of Diy, 400w Complete System Can Bring You Fully Compatible, Novice-Friendly Quick Installation, Long-Term Benefits, Damaged Replacement, Technical Support.
    • 5 Step To Hassle-Free Solar：①Connecting battery②Connect Solar Panels in parallel for 12V ③Connect Battery To Controller and inverter④Connect Solar Panel To Controller⑤Connect the monitoring module to the hub
    • 7/24 Service：We Provide 7/24 Customer Service And Give You The Most Professional Service. When You Receive It, If There Is Any Problem, You Can Tell Us And We Will Give You A Reasonable Reply
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    • One-Stop Solar Solution: The 400W complete solar complete system generates 1600Wh of power daily and stores 3.5Kwh of power, making it the essential kit for your RV trip. This system comes with everything you need to build an off-grid solar system, no additional purchases required. It includes 4pcs 100W solar panel, 12.8V 280Ah lithium battery, 2000W inverter, 40A MPPT charge controller, monitor module and all necessary cables.
    • Say Bye To DIY:To Save You The Trouble Of Diy, 400w Complete System Can Bring You Fully Compatible, Novice-Friendly Quick Installation, Long-Term Benefits, Damaged Replacement, Technical Support.
    • 5 Step To Hassle-Free Solar：①Connecting battery②Connect Solar Panels in parallel for 12V ③Connect Battery To Controller and inverter④Connect Solar Panel To Controller⑤Connect the monitoring module to the hub
    • 7/24 Service：We Provide 7/24 Customer Service And Give You The Most Professional Service. When You Receive It, If There Is Any Problem, You Can Tell Us And We Will Give You A Reasonable Reply
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    #4
    ECO-WORTHY
    ECO-Worthy 1.6KWH Complete Solar Panel Kit 400W 12V for RV Off Grid: 4 * 100W Solar Panel + 40A MPPT Controller + 2 * 12V 100Ah Lithium Battery +...
    23% Off
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    • Daily output of 1.6KWH from the solar panel kit, suitable for powering various devices like TV, air conditioner, and refrigerator under 2000W rated power.
    • Solar panels feature 12BB solar cells with a composite back panel, offering a conversion rate of 23% and generating 400Wh per day under optimal conditions, providing up to 33% more power than traditional panels.
    • The kit includes a 40A MPPT solar controller and a 2000W pure sine wave inverter, achieving high tracking efficiency of 99% and peak conversion efficiency of 98%, effectively utilizing battery power.
    • New lithium battery technology offers over 3000 deep cycles and high charge/discharge efficiency, coupled with a built-in battery management system for enhanced protection.
    • Included components: 4*100W bifacial solar panels, 1*40A MPPT controller, 1*2000W power inverter, 2*12V 100Ah lithium batteries, 1*Bluetooth Module 5.0, and necessary accessories.
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    • Daily output of 1.6KWH from the solar panel kit, suitable for powering various devices like TV, air conditioner, and refrigerator under 2000W rated power.
    • Solar panels feature 12BB solar cells with a composite back panel, offering a conversion rate of 23% and generating 400Wh per day under optimal conditions, providing up to 33% more power than traditional panels.
    • The kit includes a 40A MPPT solar controller and a 2000W pure sine wave inverter, achieving high tracking efficiency of 99% and peak conversion efficiency of 98%, effectively utilizing battery power.
    • New lithium battery technology offers over 3000 deep cycles and high charge/discharge efficiency, coupled with a built-in battery management system for enhanced protection.
    • Included components: 4*100W bifacial solar panels, 1*40A MPPT controller, 1*2000W power inverter, 2*12V 100Ah lithium batteries, 1*Bluetooth Module 5.0, and necessary accessories.
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    #5
    ECO-WORTHY
    ECO-WORTHY 1.6KWH Complete Solar Panel Kit 400W 12V for RV Off Grid: 400W Solar Panels + 40A MPPT Charge Controller +12V 100Ah Lithium Battery +...
    29% Off
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    • Daily power output of 1.6KWh achievable in 4 hours of sunlight, suitable for various applications including RVs and homes.
    • Equipped with 12BB solar cells and composite back panel, delivering a conversion rate of 23% and generating 400Wh per day under ideal conditions, outperforming traditional panels by up to 33%.
    • Features 99% tracking efficiency and 98% peak conversion efficiency with MPPT technology, ensuring stable charging even in cloudy conditions and minimizing sunlight waste.
    • Utilizes a new lithium battery with over 3000 deep cycles and advanced BMS for protection against overcharging, overheating, and short circuits, offering superior longevity compared to lead-acid batteries.
    • Includes a pure sine wave 1100W inverter with 95% conversion efficiency, optimizing battery usage with minimal self-consumption.
    • Package contains four 100W bifacial solar panels, a 40A MPPT controller, an 1100W inverter, a 12V 100Ah lithium battery, a Bluetooth Module 5.0, and necessary accessories.
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    • Daily power output of 1.6KWh achievable in 4 hours of sunlight, suitable for various applications including RVs and homes.
    • Equipped with 12BB solar cells and composite back panel, delivering a conversion rate of 23% and generating 400Wh per day under ideal conditions, outperforming traditional panels by up to 33%.
    • Features 99% tracking efficiency and 98% peak conversion efficiency with MPPT technology, ensuring stable charging even in cloudy conditions and minimizing sunlight waste.
    • Utilizes a new lithium battery with over 3000 deep cycles and advanced BMS for protection against overcharging, overheating, and short circuits, offering superior longevity compared to lead-acid batteries.
    • Includes a pure sine wave 1100W inverter with 95% conversion efficiency, optimizing battery usage with minimal self-consumption.
    • Package contains four 100W bifacial solar panels, a 40A MPPT controller, an 1100W inverter, a 12V 100Ah lithium battery, a Bluetooth Module 5.0, and necessary accessories.
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    #6
    CALLSUN
    Callsun 400W 12V Bifacial Solar Panel Kit with 40A MPPT Charge Controller, 2pcs 200W N-Type 16BB 25% High Efficiency Solar Panel for RV Van Marine...
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    • 【Bifacial/Dual-zone Design – Boost Output】Unlike standard panels, the bifacial design harvests sunlight not only from the front, but also rear reflection and diffuse rays. When mounted on high reflective surfaces, it can generate up to 30% more energy, maximizing daily output without extra panels or roof space. Each panel is split into two independent zones, so if one side is partially shaded by trees, vents, or roof accessories, the other side continues generating power. This dual-zone design improves shade tolerance by up to 50%
    • 【High-Output 16BB N-Type Cells】The Callsun Premium 400W Solar Kit features two 200W N-Type bifacial panels, delivering higher energy density. Advanced 16BB technology ensures efficient power generation, achieving more than 25% conversion efficiency, The electrodes are manufactured with Zero Cut Technology, reducing micro-cracks and hotspots, which minimizes heat generation and boosts overall efficiency
    • 【Advanced MPPT Charge Control】The included 40A MPPT charge controller continuously tracks the panel’s optimal power point for maximum energy harvest. With up to 99.8% tracking efficiency and 98% peak conversion efficiency, MPPT outperforms traditional PWM controllers by 20–30%, while protecting your batteries from overcharging and over-discharging. This ensures higher energy yield and long-term system reliability.
    • 【Pre-Wired & Easy Installation】Each panel comes with pre-drilled mounting holes, long pre-attached cables, and Y-type connectors for plug-and-play setup. This reduces wiring complexity, saves installation time, and keeps your roof layout clean. Ideal for RVs, vans, trailers, or fixed mounts, even for first-time installers.
    • 【Durable & Reliable in Any Condition】Engineered for decades of outdoor use, panels feature 3.2mm tempered glass, corrosion-resistant aluminum frames, and IP68 waterproofing. A low temperature coefficient of -0.3%/K ensures stable performance in extreme heat. Backed by 10 years of material & workmanship support and a 25-year performance guarantee (84.5% output).
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    • 【Bifacial/Dual-zone Design – Boost Output】Unlike standard panels, the bifacial design harvests sunlight not only from the front, but also rear reflection and diffuse rays. When mounted on high reflective surfaces, it can generate up to 30% more energy, maximizing daily output without extra panels or roof space. Each panel is split into two independent zones, so if one side is partially shaded by trees, vents, or roof accessories, the other side continues generating power. This dual-zone design improves shade tolerance by up to 50%
    • 【High-Output 16BB N-Type Cells】The Callsun Premium 400W Solar Kit features two 200W N-Type bifacial panels, delivering higher energy density. Advanced 16BB technology ensures efficient power generation, achieving more than 25% conversion efficiency, The electrodes are manufactured with Zero Cut Technology, reducing micro-cracks and hotspots, which minimizes heat generation and boosts overall efficiency
    • 【Advanced MPPT Charge Control】The included 40A MPPT charge controller continuously tracks the panel’s optimal power point for maximum energy harvest. With up to 99.8% tracking efficiency and 98% peak conversion efficiency, MPPT outperforms traditional PWM controllers by 20–30%, while protecting your batteries from overcharging and over-discharging. This ensures higher energy yield and long-term system reliability.
    • 【Pre-Wired & Easy Installation】Each panel comes with pre-drilled mounting holes, long pre-attached cables, and Y-type connectors for plug-and-play setup. This reduces wiring complexity, saves installation time, and keeps your roof layout clean. Ideal for RVs, vans, trailers, or fixed mounts, even for first-time installers.
    • 【Durable & Reliable in Any Condition】Engineered for decades of outdoor use, panels feature 3.2mm tempered glass, corrosion-resistant aluminum frames, and IP68 waterproofing. A low temperature coefficient of -0.3%/K ensures stable performance in extreme heat. Backed by 10 years of material & workmanship support and a 25-year performance guarantee (84.5% output).
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    #7
    ECO-WORTHY
    ECO-WORTHY 200 Watts 12 Volt/24 Volt Solar Panel Kit with High Efficiency Monocrystalline Solar Panel and 30A PWM Charge Controller for RV, Camper,...
    11% Off
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    • Daily output of 800Wh under optimal sunlight conditions, suitable for various applications including RVs, marine, and backup power.
    • Utilizes high-efficiency monocrystalline solar cells with a performance rating of up to 21.5%, size: 35.2 x 23.1 x 1.37 in.
    • Features a corrosion-resistant aluminum frame, designed for durability against extreme weather conditions, with an IP65 rated junction box for complete protection.
    • Pre-drilled holes and plug-and-play cables enable easy installation; supports series (24V) and parallel (12V) connections, includes all necessary components such as solar panels and mounting brackets.
    • Offers 1 year of support with 24/7 technical assistance available for any inquiries or issues.
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    • Daily output of 800Wh under optimal sunlight conditions, suitable for various applications including RVs, marine, and backup power.
    • Utilizes high-efficiency monocrystalline solar cells with a performance rating of up to 21.5%, size: 35.2 x 23.1 x 1.37 in.
    • Features a corrosion-resistant aluminum frame, designed for durability against extreme weather conditions, with an IP65 rated junction box for complete protection.
    • Pre-drilled holes and plug-and-play cables enable easy installation; supports series (24V) and parallel (12V) connections, includes all necessary components such as solar panels and mounting brackets.
    • Offers 1 year of support with 24/7 technical assistance available for any inquiries or issues.
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    #8
    CALLSUN
    Callsun N-Type 16BB 400W Bifacial Solar Panel, 2Pcs 200 Watt Solar Panel 12V, 25% High Efficiency, Dual-module Parallel Anti-Shade Design, for RV Van...
    15% Off
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    • Made with N-type solar cells, achieving 25% conversion efficiency, surpassing traditional P-type cells.
    • Bifacial design captures solar energy from both sides, enhancing output by 30% compared to standard panels.
    • Incorporates advanced 16BB solar cell technology for improved efficiency and reduced hot spot risk.
    • Lightweight (23.8 lbs) and compact dimensions (51.3 x 30.3 x 1.4 inches) with pre-drilled holes for fast installation.
    • Durable construction with low-iron tempered glass and corrosion-resistant aluminum, offering up to 30 years of lifespan.
    • 10-year tech support with a 25-year output maintenance guarantee at 84.5%.
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    • Made with N-type solar cells, achieving 25% conversion efficiency, surpassing traditional P-type cells.
    • Bifacial design captures solar energy from both sides, enhancing output by 30% compared to standard panels.
    • Incorporates advanced 16BB solar cell technology for improved efficiency and reduced hot spot risk.
    • Lightweight (23.8 lbs) and compact dimensions (51.3 x 30.3 x 1.4 inches) with pre-drilled holes for fast installation.
    • Durable construction with low-iron tempered glass and corrosion-resistant aluminum, offering up to 30 years of lifespan.
    • 10-year tech support with a 25-year output maintenance guarantee at 84.5%.
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    #9
    RENOGY
    Renogy 400W 12V RV Solar Panel Kit, 4*100 Watt Monocrystalline Solar Panel, Adventurer 30A LCD PWM Charge Controller, BT1 Bluetooth Module,Mounting...
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    • Daily output of 1600Wh based on 4 hours of sunlight, making it ideal for RVs, campers, boats, and greenhouses.
    • High solar cell efficiency at 22%, with a corrosion-resistant aluminum frame designed to endure extreme weather, including high winds and heavy snow loads.
    • The Adventurer 30A PWM Charge Controller is compatible with 12V and 24V systems, providing multiple protection features against overcharging, overvoltage, and reverse polarity.
    • Designed for easy installation with pre-drilled holes and Plug&Play cables, supporting lithium, lead-acid, and gel batteries, along with Y branch connectors for parallel setups.
    • Includes a 10-year warranty and 24/7 technical support.
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    • Daily output of 1600Wh based on 4 hours of sunlight, making it ideal for RVs, campers, boats, and greenhouses.
    • High solar cell efficiency at 22%, with a corrosion-resistant aluminum frame designed to endure extreme weather, including high winds and heavy snow loads.
    • The Adventurer 30A PWM Charge Controller is compatible with 12V and 24V systems, providing multiple protection features against overcharging, overvoltage, and reverse polarity.
    • Designed for easy installation with pre-drilled holes and Plug&Play cables, supporting lithium, lead-acid, and gel batteries, along with Y branch connectors for parallel setups.
    • Includes a 10-year warranty and 24/7 technical support.
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    #10
    RENOGY
    Renogy 400W 12V RV Solar Panel Kit, 4*100 Watt Monocrystalline Solar Panel, Adventurer 30A LCD PWM Charge Controller, BT1 Bluetooth Module,Mounting...
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    • Daily output of 1600Wh based on 4 hours of sunlight, making it ideal for RVs, campers, boats, and greenhouses.
    • High solar cell efficiency at 22%, with a corrosion-resistant aluminum frame designed to endure extreme weather, including high winds and heavy snow loads.
    • The Adventurer 30A PWM Charge Controller is compatible with 12V and 24V systems, providing multiple protection features against overcharging, overvoltage, and reverse polarity.
    • Designed for easy installation with pre-drilled holes and Plug&Play cables, supporting lithium, lead-acid, and gel batteries, along with Y branch connectors for parallel setups.
    • Includes a 10-year warranty and 24/7 technical support.
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    • Daily output of 1600Wh based on 4 hours of sunlight, making it ideal for RVs, campers, boats, and greenhouses.
    • High solar cell efficiency at 22%, with a corrosion-resistant aluminum frame designed to endure extreme weather, including high winds and heavy snow loads.
    • The Adventurer 30A PWM Charge Controller is compatible with 12V and 24V systems, providing multiple protection features against overcharging, overvoltage, and reverse polarity.
    • Designed for easy installation with pre-drilled holes and Plug&Play cables, supporting lithium, lead-acid, and gel batteries, along with Y branch connectors for parallel setups.
    • Includes a 10-year warranty and 24/7 technical support.
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    How We Estimate & Rank

    We make shopping simple by hand-picking the top 10 400 Watt Solar Panel Kit just for you. Our team focuses on what’s available right now, what’s popular with other shoppers, and, most importantly, what’s most relevant to your search. We cover leading brands such as Renogy, ECO-WORTHY, Callsun, GCUSSZ, PLUGGEDSOLAR, and other trusted names in this category. By filtering out the noise, we ensure you only see high-quality options that actually meet your needs. It’s all the best finds, minus the endless scrolling!

    2,174
    PRODUCTS SCANNED & ANALYZED

    Final Recommendations

    We’ve selected three standout options to make your choice easier.

    BEST OVERALL

    Our overall winner is Renogy 400 Watt 12 Volt Premium 4 Pcs 100W Panel+40A MPPT Charge Controller+ Bluetooth Module Fuse+ Mounting Z Brackets+Adaptor Kit +Tray Cables Set by Renogy, earning top marks for its balanced combination of quality, performance, and price.

    Renogy 400 Watt 12 Volt Premium 4 Pcs 100W Panel+40A MPPT Charge Controller+ Bluetooth Module Fuse+ Mounting Z Brackets+Adaptor Kit +Tray Cables Set, 400W, Grid 12V Solar Power System
    BEST VALUE

    The best value for most shoppers is [Ultra] ECO-Worthy 12V 400W Complete Solar Panel Kit for RV Off Grid Travel Trailer : 4 * 100W Solar Panel + 40A MPPT Controller + 12V 280Ah Lithium Battery + 2000W Power Inverter+Monitor Module by ECO-WORTHY, earning consistently positive feedback for its performance and accessible pricing.

    [Ultra] ECO-Worthy 12V 400W Complete Solar Panel Kit for RV Off Grid Travel Trailer : 4 * 100W Solar Panel + 40A MPPT Controller + 12V 280Ah Lithium Battery + 2000W Power Inverter+Monitor Module
    BEST DEAL

    The best deal available right now for Solar Panels is ECO-WORTHY 1.6KWH Complete Solar Panel Kit 400W 12V for RV Off Grid: 400W Solar Panels + 40A MPPT Charge Controller +12V 100Ah Lithium Battery + Solar Power Inverter + Bluetooth Module by ECO-WORTHY, now offered at 29% off.

    ECO-WORTHY 1.6KWH Complete Solar Panel Kit 400W 12V for RV Off Grid: 400W Solar Panels + 40A MPPT Charge Controller +12V 100Ah Lithium Battery + Solar Power Inverter + Bluetooth Module