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SES SX20U solar panel specifications
Model Number SES-420J
STC Rating 20.0
Module Cell Type Monocrystalline
Open Circuit Voltage (V) 21.0
Short Circuit Current (A) 1.29
Frame Color Silver
Origin Hong Kong
Power % ± -10/10
(W/ft²) 8.30
Module Efficiency 9.4%
Area (ft²) 4.8
Weight (lbs) 13.2
Length (in) 33.00
Width (in) 21.10
Height (in) 2.0

This solar panel is available with our

MAPPS Complete Remote Solar Power Systems

Systems include everything you need to power your remote equipment: solar module, mounting structure, wiring harness, battery enclosure, charge controller, sealed battery and installation manual.

Case or pallet quantities are available for
OEM's and Industrial Customers
Contact us for pricing.

SES 420J BP SX20U 20W Solar Panel

Solar Electric Supply SES

SES 420J BP SX20U 20W Solar Panel

MAPPS pole-mounted off-grid solar panel system
The SES 420J is available with our
SES MAPPS solar systems.

(replaces the discontinued BP Solar SX-20U & SX 320J)

The SES 420J 20 Watt solar panel is part of SES's rugged industrial off grid series. These high quality solar modules provide cost-effective photovoltaic power for DC battery charging systems. With 36 monocrystalline cells in series, this panel charges batteries efficiently in any climate.

The SES 420J is a BP SX solar panel replacement intended for 12VDC solar battery charging systems (charge controller required). It may be wired in series for higher nominal voltages. It is ideal for longevity outdoors; with an anodized aluminum frame and tempered glass face.

The SES 420J is approved for applications in NEC Class 1, Division 2 Groups A, B, C & D hazardous locations and approved for explosion resistance. This certification is required near gas and oil pipelines.

The SES 420J is Built to Last

From mountaintops to vast oil fields, on weather stations in the bitter cold of Antarctica and on telephone signal repeaters in the hot Australian outback, the technology behind these reliable solar panels has been proven in the harshest environments.

junction box
Standard Junction Box

The SES 420J has has a weatherproof junction box and a very rugged frame. The standard terminals accept 8 AWG to 14 AWG wire. The raintight (IP65 Rated) junction box of the SES 420J accepts PG13.5 or 1/2" nominal conduit or cable fittings. With its four-terminal connection block, it enables most system array connections (putting modules in series or parallel) to be made right in the junction box. Simiar to the BP SX-20U.

Remote Industrial Applications:

MAPPS Class 1 Division 2 solar panel system
The SES 420J is certified for use in
Class 1 Division 2 solar systems.
  • Oil and gas metering
  • Microwave Repeaters
  • Two Way Radio & Microwave
  • Class I Div 2 Solar Systems for oil/gas
  • Security cameras
  • Cellular Repeaters & Enhancers
  • Water metering
  • Security & Area Lighting
  • Obstruction lights

ISO 9001 Certified:

ISO 9001 factory certification ensures that our manufacturing facilities use proven manufacturing and control processes.

Approval Listings and Qualifications:

solar panel certifications
  • Certified according to the extended version of the IEC 61215 (ed. 2), EC 61215:2005-08 (Crystalline silicon terrestrial photovoltaic modules - Design qualification and type approval)
  • Certified according to IEC 61730-1 and IEC 61730-2 (ed. 1), EN 61730-1:2007-05 and EN 61730-2:2007-05. (photovoltaic module safety qualification, requirements for construction and testing).
  • Listed to UL 1703 & ULC ORD-C1703 Standard for Safety by Intertek ETL. Class C Fire Rating.
  • Approved by Intertek ETL according to FM 3611, Dec 2004, and according to CAN/CSA C22.2 No. 213-M1987, 1st Edition, Reaffirmed 2004, for use in a Class I Division 2, Group A, B, C, D Hazardous (Classified) Location.

SES 410J PV Module Warranty

  • Free from defects in materials and workmanship for 2 years
  • 90% Min power output for 12 years
  • 25 year warranty optional
    *Refer to limited warranty certificate for terms and conditions

Contact us toll-free: (877) 297-0014.

Durable Frame and Backsheet

corner of solar panel frame

This solar module features a rugged weatherproof anodized aluminum frame for longevity in high-wind conditions. The thick, durable, scratch resistant backsheet provides extra insulation for increased protection against the elements and rough handling. The white polyester backsheet material lasts the life of the module and increases energy production.

Pre-drilled Mounting Holes

solar panel frame mounting holes

The anodized aluminum frame features clean pre-drilled mounting holes for solid grounding and attachment to the PV module mount.

SES 420J BP SX20U Solar Panel Review

Weathertight Conduit Ready Junction Box

PV junction box

This conduit ready J-type junction box has accessible terminals for easier module interconnections in off-grid solar PV systems. It features cable glands that allow for fitting of various cable sections. Gaskets are included. The box is securely attached to the module frame wall for added durability.

High Reliability

solar panel frame mounting holes

Cell interconnections and diode placement use well-established industry practices and are field-proven to provide excellent reliability.

Approved Solar Vendor For:

  • US Federal Agencies
  • US DOD
  • SAIC
  • Black & Veatch
  • Grainger
  • Graybar Electric
  • CED
  • Crescent Electric

Exostar Approved for:

  • Lockheed Martin
  • Boeing
  • Raytheon
  • Hughes
  • & many others!

We are a government approved vendor, Net 30 with PO.
Government, educational and corporate P.O.s & IMPAC cards accepted.

SES solar panel approval listings and certifications
Label on back of modules shows Approval Listings and Certifications

The SES 420J is a direct bolt in replacement for the:
BP Solar SX-320J
. It is a good substitute for the SX20U.

Complete off-grid solar panel systems available.

Contact us toll-free: (877) 297-0014


Contractor Discounts Available


  Popular inverters we supply:


SES Solar Panels  •  Off-Grid Solar Panels

Contact us for sales, quantity discounts and expert reviews for the SES 420J BP SX20U solar panel.