Redarc SMRP1120B 120W Fixed Monocrystalline Solar Panel

The Redarc SMRP1120B is a rugged 120W fixed monocrystalline solar panel designed for reliable off-grid battery charging. Built with a tempered glass surface and anodised aluminium frame, this panel is engineered to handle rough road conditions and extreme weather. It is ideal for use on 4WDs, caravans, motorhomes, and marine applications where dependable auxiliary battery support is required.

Key Features

  • 120W monocrystalline design for high efficiency output.
  • Durable anodised aluminium frame and tempered glass coating for long-lasting performance.
  • Quality MC4 connectors for secure and weather-resistant wiring.
  • Diode-protected junction box prevents backfeed and improves safety.
  • Compact size and lightweight build for easy installation on vehicles or fixed setups.
  • Compatible with Redarc solar regulators and BCDC chargers with inbuilt solar inputs.

Technical Specifications

Maximum Power
120 W
Cell Type
Monocrystalline
Voltage at Max Power
18.8 V
Current at Max Power
6.39 A
Open Circuit Voltage
22.0 V
Short Circuit Current
6.70 A
Power Tolerance
±3%
Operating Temp Range
-40°C to +85°C
Dimensions
1070 × 590 × 35 mm
Weight
6.7 kg
Cable Length
900 mm
Connector Type
MC4 style
Frame
Anodised Aluminium
Front Material
Tempered Glass
Compliance
CE, UKCA, RCM

Installation and Use

The SMRP1120B must be installed with a suitable solar regulator or a compatible Redarc BCDC charger with built-in MPPT regulation. Panels should be mounted securely to handle wind and vibration loads on vehicles. For best performance, orient the panel between 20°–40° towards the sun and minimise shading. Wiring should be carried out with correctly rated cables and fuses.

Cell TypeMonocrystalline
Panel TypeRigid
Nominal Power (PMPP)120W
Max Power Voltage (VMPP)18.8V
Max Power Current (IMPP)6.39A
Open Circuit Voltage (VOC)22.0V
Short-Circuit Current (ISC)6.70A
Number of cells in series33
Length MM1070
Width MM590
Height MM35
Warranty24
Weight KG16.7
Model # SMRP1120B
Barcode # 09338628011001

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What is the Redarc SMRP1120B?
The Redarc SMRP1120B is a 120W fixed monocrystalline solar panel designed for off-grid power in 4WD, caravans, camper trailers, and marine applications.
Can I buy the Redarc SMRP1120B from Archer Batteries?
Yes, the Redarc SMRP1120B is available for purchase directly from Archer Batteries, both online and in-store. Archer Batteries also provides expert advice and installation support.
What type of solar cells does the SMRP1120B use?
It uses high-efficiency monocrystalline cells, providing excellent performance and higher output compared to polycrystalline panels.
Is the SMRP1120B suitable for use with lithium batteries?
Yes, when paired with a Redarc BCDC charger or MPPT regulator, the panel can safely charge LiFePO4 lithium batteries as well as AGM, Gel, Calcium, and standard Lead Acid batteries.
What are the dimensions and weight of the SMRP1120B?
The panel measures 1070 × 590 × 35 mm and weighs approximately 6.7 kg, making it compact and lightweight for installation on caravans, campers, or boats.
Is the SMRP1120B weatherproof?
Yes, it is built with a tough anodised aluminium frame and tempered glass, designed to withstand water, dust, heat, and vibration in harsh Australian conditions.
Does the panel include a regulator?
No, the SMRP1120B does not include a regulator. It must be used with a suitable solar regulator or a Redarc BCDC charger with a built-in MPPT regulator.
How much current does the SMRP1120B produce?
At maximum power, the panel produces 6.39 amps, with an open circuit voltage of 22.0V and a short circuit current of 6.70A.
What is the best way to mount the SMRP1120B?
The panel should be securely mounted using appropriate brackets on a flat or slightly angled surface, such as a caravan roof or camper trailer. A tilt toward the sun will improve efficiency.
Why choose the Redarc SMRP1120B over cheaper panels?
Unlike cheaper solar panels, the SMRP1120B is built to last in harsh environments. Backed by Redarc’s engineering and reliability, it offers consistent output and peace of mind for long trips off-grid.