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1.1 INTRODUCTION
A Solar Controller (or Charge Controller / Regulator) is an essential component of your photovoltaic solar system. The Controller main-
tains the life of the battery by protecting it from overcharging. When your battery has reached a 100% state of charge, the Controller
prevents overcharging by limiting the current owing into the batteries from your solar array.
The GP-PWM-30-UL uses Pulse Width Modulation (PWM) technology and a unique four stage charging system that includes an optional
equalize setting to charge and protect your battery bank. The GP-PWM-30-UL features an LCD digital display that shows the charge
current of the solar array, system battery voltage and battery state of charge. The GP-PWM-30-UL also features Maximum Power Boost
Technology™ for manual bulk and absorption charge at any stage of the charge cycle.
1.2 SYSTEM VOLTAGE AND CURRENT
GP-PWM-30-UL is intended for use at 12 VDC system voltage and is rated for a maximum continuous DC input current of 37.5A and
input voltage of 35VDC.
Per National Electrical Code (NEC) article 690.7 and 690.8, PV module nameplate ratings must be multiplied by required values (typically
1.25 for both voltage and current) to obtain the maximum voltage and continuous current available from the module.
Applying NEC factors, the maximum allowable nameplate PV Panel rated Isc is 30A (30A x 1.25 = 37.5A), and the maximum voltage,
Voc is 28VDC (28VDC x 1.25 = 35VDC).
The voltage and current ratings of all equipment connected to PV panels must be capable of accepting the voltage and current levels
available from PV panels installed in the eld.
1.3 BATTERY TYPE
The GP-PWM-30-UL is suitable for use with lead acid batteries (vented, GEL, or AGM type) as well as some lithium iron phosphate
(LiFePO4) batteries that are supplied with a Battery Management System (BMS.
1.4 LOW VOLTAGE DISCONNECT FUNCTION (USB PORT, INVERTER REMOTE SIGNAL)
To protect the battery against over-discharge this function automatically switches off the USB output port when Battery 1 voltage is
lower than 11.0 VDC. If a compatible inverter is connected and set to remote mode, the controller will also switch off the inverter. This
will occur with a delay of 2 to 3 minutes.
As soon as Battery 1 reaches a voltage of 12.2 VDC (for LFP) or 12.8 VDC (for SEALED, AGM, or FLOODED) the USB output port is
switched on again. If a compatible inverter is connected and in remote mode, it will also be switched on again.
1.5 BLUETOOTH
®
WIRELESS TECHNOLOGY
The latest versions of GP-PWM-30-UL have integrated Bluetooth® Low Energy wireless technology ready to be paired to your mobile
device using the Go Power! Connect app available for download from the App Store and Play Store
1.6 REGULATORY INFORMATION
1. INSTALLATION OVERVIEW
PHOTOVOLTAIC CHARGE
CONTROLLER FOR USE IN
LAND VEHICLES
NO. E500409
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