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A simple two stage regulator for charging sealed or gel lead acid batteries from
photovoltaic panels. It uses a rugged power mosfet and switches on the negative side.
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PR1210L 12 Volt 10 Amp Regulator
FOR SEALED OR GEL LEAD ACID BATTERIES
INSTALLATION
Mount the regulator by the holes in the terminal
block. In hot or enclosed spaces, allow 1 cm space
behind the regulator. Connect a wire from the
positive battery terminal to the Battery positive
(BAT+) terminal. Connect another wire from the
negative battery terminal to the Battery negative
(BAT-) terminal. Connect a third wire between the
negative side of the solar panel and the Solar
negative (SOL-) terminal. Connect the solar panel
positive to the positive battery terminal (directly to
the battery, not to the BAT+ terminal on the
regulator). We recommend the installation of a
reverse blocking diode in the solar positive wire.
IMPORTANT: The wire from the SOL- terminal
must not be connected to the chassis of motor
vehicles or motorhomes. If you connect the SOL-
wire to chassis, you will bypass the regulator and
you may overcharge your battery.
HOW THE REGULATOR WORKS
The regulator works like an intelligent switch
between the BAT- terminal and the SOL- terminal.
Charge current flows into the battery until the
battery voltage rises to the boost maximum (14.2 V).
The regulator now switches to float mode. The
current is switched off and the battery voltage slowly
falls. When the battery voltage drops below the float
cut in voltage (13.4 V), the current is switched on
again. The charge current continues to flow into the
battery until the voltage rises to the float maximum
(14.0 V). The charge current is then turned off. The
regulator switches the current on and off to keep the
battery voltage between the float maximum voltage
and the float cut in voltage. When the battery has
been discharged enough for it to fall below the boost
cut in voltage (12.5 V), the unit will switch back into
boost mode.
DO NOT Attempt to test the regulator without a
battery connected. This is not a linear regulator.
The PR1210L is ideal for camping, boating,
and other one or two panel solar applications.
It features brass inserts and screws in the
terminal block and is fully enclosed in resin.
The PR1210L is not adjustable.
SPECIFICATIONS
Boost Maximum 14.2 V
Boost Cut in 12.5 V
Float Maximum 14.0 V
Float Cut in 13.4 V
All voltages +/- 0.1 volts
Charge Current 10 A
Supply Current 4 mA
Height 56 mm
Width (max) 37 mm
Depth (max) 21 mm
Cable entry (dia.) 4.5 mm
Mounting hole M4
PR1210L 12V 10A
Manufactured by: Plasmatronics Pty Ltd
ABN 98 073 758 497
www.plasmatronics.com.au
SOLAR
+ -
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BATTERY
Reverse blocking
diode
mounting
holes
Connect the wire from
the BAT+ terminal on
the regulator directly
to the positive terminal
on the battery.
This wire must not be connected to
the chassis of motor vehicle/homes.
Doing so will bypass the regulator
and can overcharge the battery.
SOLAR REGULATOR
BAT + BAT- SOL -
PLASMATRONICS
PR1210L 12V 10A
JS121205 PR200_1
