Grape Solar GS-PWM-20A Assembly instructions

www.GrapeSolar.com
Tel. [phone] (toll free), 1-541-349-9000 Document Version 210519
©Copyright 2021, Grape Solar, Inc.
150 Watt Off-Grid Charging Kit
(GS-150-KIT)
Quick Connect Guide
IMPORTANT: Please read GS-PWM-20A charge controller
owner’s manual and GS-STAR-50W connection guide (both
included with products) before assembling kit.
For additional information about Grape Solar products:
email [e-mail], or
call 1-877-264-1014 for live telephone support.
GS-150-KIT PHOTOVOLTAIC
POWER GENERATION SYSTEM
QUICK CONNECT GUIDE Rev. 210519
1Check your order to make sure that all parts are included:
 GS-PWM-20A Charge Controller
 3x GS-STAR-50W Solar Panel
 2x Branch Connector Set
 5-Foot Ring-lug Red/ Black Cable Pair
 Black 15-foot MC4 Cable
Additional tools and equipment you will need:
◦Screwdriver– Philips Head ◦Wire Stripper/Cutter
◦12-Volt Deep-Cycle Battery Bank ◦Voltmeter (for Troubleshooting)
Mount the three 50-watt solar panels  so that they are facing due South at approximately the same angle as
your latitude. The ideal area has full sun and no shading. If the following connections are made during daylight,
cover the panel with cardboard, cloth, or a similar opaque material so that the panel does not put out power.
Connect the wire end of the red battery cable to the
“+BATTERY” terminal on the back of the GS-PWM-20A
charge controller . Connect the wire end of the 5-foot
black cable  to the “-BATTERY” terminal. A Phillips head
screwdriver can be used to loosen and tighten the screw
clamps onto the wires.
Attach the ring lug end of the red cable  to the positive
terminal of a 12V deep cycle battery. Attach the ring lug end
of the black cable  to the negative terminal.
2
3

[diagrams not to scale]



*12V deep cycle battery
not included with kit



www.GrapeSolar.com
Tel. [phone] (toll free), 1-541-349-9000 Document Version 210519
©Copyright 2021, Grape Solar, Inc.
GS-150-KIT PHOTOVOLTAIC
POWER GENERATION SYSTEM
QUICK CONNECT GUIDE Rev. 210519
4Using wire cutters, snip the 10-gauge, 15ft.
MC4 extension cable  into two equal halves
(7.5ft each.) On the cut ends, strip off ¼-inch of
insulation, revealing bare wire. Connect the
branch connectors  to the cable ends such
that each input becomes 3 inputs.
Connect the MC4 ends of the halved cable  to the
compatible MC4 ends of the solar panel  cables.
(Mark the end of the positive panel cable with a piece
of tape to help distinguish polarity during connection.)
5


Connect the bare wire end of the positive cable  to the “SOLAR +” input of the charge controller . Connect
the negative bare end  to the “SOLAR -” input. Now, you can mount the GS-PWM-20A charge controller to an
indoor wall or within a NEMA-3R rated enclosure.
Remove the panel covering. In good sunlight, the charge controller’s  ”BAT %” should increase to 100%. Once
the battery is fully charged and the controller is set to “LOAD ON,” the system will provide power through the load
control output or through the two USB ports. If an inverter is added to the system, it must be connected to the
battery bank, and not to the charge controller.
6



*12V load not
included with kit
DISCLAIMER:
Installations of this kit could be subject to national and local building and electrical codes. Installers should have adequate knowledge of
national and local code to ensure the installation passes inspection by the local electric authority.
Proper fuses or breakers should be used to comply with all local and national codes. Contact Grape Solar for specific recommendations.
All batteries used for this system should be identical. Do not mix battery types or sizes. Do not mix old batteries with new batteries.
Performance and charging anomalies can occur if types, sizes, or age of batteries are not identical.
Grape Solar does not warrant the accuracy, sufficiency, or suitability to all customers of any technical or other information provided in
product manuals. Grape Solar does not claim any responsibility or liability for losses, damages, costs or other expenses whether special,
indirect, consequential or incidental, which might arise out of the use of such information.
7





*12V deep cycle battery
not included with kit
