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TK 56237-11-IM (Rev. 0, 11/15) Copyright© 2015 Thermo King Corp. Minneapolis, MN, USA

ThermoLite™ 100W-300W Solar Panel Installation Guide

General Installation Precautions and Specifications

NOTE: This equipment is designed and rated for 12V DC nominal systems.

The solar panel, application surface and air temperature must all be above 45 F (1.3 C).

For best results when applying the panel adhesive, ensure the surface is completely clean using 
Isopropal alcohol or appropriate de-greasers. Ensure all cleaning residue is removed and the surface is 
dry. 

The adhesive backing is very aggressive and is difficult to remove once installed.

Always ensure the solar panel fuse (located on the positive battery harness) is removed during 
installation or service.

Always locate the charge controller near the unit’s battery to avoid voltage loss in the cable.

100W Base kit Installation

1. Turn off the refrigeration unit and any accessory equipment including standby power connection to 

the truck or tractor.

2. Disconnect the negative battery cable of the refrigeration unit and any accessory battery packs used 

for lift gate or other auxiliary equipment. 

3. Temporarily remove fuse from solar panel harness

.

4. Panel installation location on the truck/trailer can be either the front or the back. Factors to be 

considered are:

a. If reefer unit is present with existing two-pole (two wire) connections with a wire gauge of 12 AWG 

or larger to the liftgate batteries, then the panels should be installed on the roof of the trailer near 
the front to utilize the existing connections 

(Figure 1)

.

b. Front of the trailer installations are generally preferred so vehicles parked against a building will 

not shade the panels and reduce performance

c. Consider installing the panels away from tractor and unit exhaust. The panel may be positioned 

length wise or perpendicular to the trailer roof edge. Exhaust soot build-up on the panel can result 
in decreased performance of the panel if not cleaned.

d. The junction boxes should be positioned closest to the edge of the trailer end and lined up with 

the planned wire route.

e. If snow scrapers are to be used for winter snow removal, position the panel with the long edge 

containing the junction box aligned to the front edge of the trailer so the sloped edge of the 
junction box is facing forward 

(Figure 2)

.

WARNING: Always wear safety glasses and protective gloves when working with batteries. Your 
company may require additional PPE. Consult your company safety policy and requirements prior 
to installation of this product.

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