BZ PRODUCTS, INC.
INSTALLATION MANUAL
VERSION 1.0
MODEL BZ 7/12
BZ 7/24
BZ 7/36
BZ 7/48
PWM SOLAR CHARGE CONTROL
CAUTION! READ ALL INSTRUCTIONS PRIOR TO
INSTALLING OR USING THIS EQUIPMENT.
SAFETY INSTRUCTIONS:
Refer service to qualified service personal. Incorrect installation may result in risk
of fire. Remove all sources of electrical power, photovoltaic and battery before servicing
this equipment. Never charge a frozen battery. Warning batteries produce explosive
gasses during normal operation. Install batteries in a well ventilated location. Follow
battery manufactures maintenance and operational recommendations. Install properly
rated fuses.
MISWIRING THE BZ 7 WILL DAMAGE THE CONTROLLER AND VOID THE WARRANTY
DESCRIPTION:
The BZ 7 PWM charge controller is a high efficiency, shunt type charge controller
capable of charge currents of 7 amps. Features include a low loss Schotkey diode to prevent night time
battery discharge, easily adjusted float voltage, MOV lightning protection, battery voltage temperature
compensation, float LED, easy installation, epoxy potted and five year limited warranty. Made in USA
SYSTEM LAYOUT:
Plan your installation. Install the BZ 7 near the battery bank. Avoid installing the
controller in wet, damp or confined locations. Do not install the BZ 7 in direct sunlight. Use short direct
wiring to the controller, batteries and PV panels. Install the controller in accordance with all state, local and
national electrical codes. Securely fasten the controller to a wall or other suitable structure. Provide support
for all wiring. Provide proper ventilation for the batteries.
WIRE AND WIRING:
Use high quality stranded wire in all installations. Solid wire is not
recommended. Use #10 or #12 wire to wire the PV panels and batteries. Protect wire from damage.
Carefully plan the installation. Clearly labeling all wiring will simplify installation and help prevent wiring
errors. Permanent wire markers are recommended for labeling all wiring. Rout wiring as directly as
possible to the PV panels and battery. Take care to follow the wiring diagram exactly. Properly seal all
wiring against water leaks. Provide proper ventilation for the batteries.
CAUTION DISCONNECT ALL SOURCES OF ELECTRICAL POWER BEFORE CHANGING FUSES
.
FUSES:
Install a 10 amp fuse and fuse holder in the B wire within 9” of the B terminal.
Install a 10 amp fuse and fuse holder in the PV + wire. See wiring diagram for details. Warranty is void if
no fuses are installed.
