© Copyright 2022 InPower LLC
LVD20 Series Owners Manual
Document: OM-230 Version Code: A
Date: May 6, 2019 Date: Mar 31, 2022
Page
3 of 4
InPower LLC
8311 Green Meadows Drive
Lewis Center, Ohio 43035 USA
740-548-0965
www.InPowerLLC.com
Installation Procedure
WARNING
!
Do not weld on the vehicle with the Low Voltage Disconnect installed as damage to the product may result. If electric
welding is necessary, disconnect the control terminal and the cables attached to the LOAD and BAT+ terminals. Damage
due to electric welding while the unit is installed will void InPower’s warranty.
Introduction
This manual provides instructions for installing InPower LVD20 Series Low Voltage Disconnects. It is important that
you follow these instructions carefully and contact InPower if you need assistance or more information. You can
reach InPower at:
InPower LLC
Customer Support
740-548-0965
www.InPowerLLC.com
Safety Precautions
This product requires the installer to be trained for installation and work on vehicle electrical systems. We recom-
mend that all wiring meet the SAE and applicable vehicle manufacturer’s wiring specications. Inspect the product
and all other components for damage before starting the installation. Do not perform the installation if any problems
exist.
Make sure that the vehicle battery power is disconnected during installation of the Low Voltage Disconnect. Recon-
nect the battery when the installation is complete. Wear appropriate safety equipment such as eyeglasses, face
shield and clothing when installing the equipment and handling the battery. Be careful when working near a battery.
Make sure the area is well ventilated and that there are no ames near the battery. Never lay objects on the battery
that can short the terminals together or to ground. If battery acid gets in your eyes immediately seek rst aid. If acid
gets on your skin immediately wash it off with soap and water.
Mounting Location
First determine where the LVD will be mounted. We recommend mounting it to a at metal surface that can absorb
heat produced by the disconnect (this will provide the best performance). Also take into consideration the maximum
current needed and the maximum mounting surface temperature (See Specication Section). The disconnect
should not be mounted in the engine compartment or any location near the engine’s heat. It is
important that the LVD be mounted in a dry environment where it is not exposed to water or chemi-
cals. For maximum thermal efciency the mounting surface should be a thick metal surface such as an aluminum
plate 1/8 x 16 x 16 inches or larger. To facilitate heat transfer a square piece of thermal transfer material is supplied
with each disconnect. Remove the clear plastic protective coating and insert the heat transfer material between the
disconnect and the mounting surface. Secure the disconnect to the at metal surface using four screws and tighten
to a torque setting of 5 inch pounds. Do not drill out the disconnect’s four mounting pad holes to use a larger
bolt size. If the mounting surface is a good quality ground (low resistance to battery negative terminal) the mount-
ing screws will provide a good ground connection. If the mounting surface is not a good ground, or you are not
sure, you must install a ground wire with a ring terminal under the Ground Terminal Pad.
Connect the Power Cables
First, make sure that the battery is disconnected. Prepare the cable to the battery using a suitable size cable for
the current required and install a crimped lug terminal on the end. Be sure that you have installed a protection
device (fuse, fuse link or circuit breaker) at the battery end of the cable. If the optional rubber terminal boot is
used install the boot over the cable and lug, then install the cable as shown in the diagram on page 4. Torque the
nut to the torque specication shown in the diagram. Slide the boot over the lug and onto the power terminal.
Prepare the cable to the loads and install the cable as you did with the battery cable.
Control Circuit
The control wire must provide a positive DC voltage of at least +9.5 volts to activate the power switch. This could
be the ignition signal or a toggle switch wired to the +12 volt battery. Crimp a female 1/4 inch Faston terminal on the
control wire and attach it to the male control input terminal.
