12 volt and 24 volt Smart Battery Overdischarge Protectors with 60 amps pass through and solid-state control

It is well known that overdischarge is the biggest enemy of lead acid batteries. This device prevents your battery from being discharged below a pre-defined point.

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Here is a convenient way to prevent over-discharge damage to batteries in RV, boat, camping, and battery backup systems. It prevents the battery from discharging below a predefined, user adjustable level.

The protection circuit also protects against overload and short-circuit conditions, protecting not only the battery, but also any upstream or downstream wiring.

Model	Price for quantity 1-10	Price for quantity 11-50	Quantity 51+
PST-SBP12060	$41.25 12V version no longer available	$37.12	$33.41
PST-SBP24060	$42.50	$38.25	$34.50

Detailed Specifications	PST-SBP12060	PST-SBP24060
Maximum pass-through current	60 amps	60 amps
Maximum pass-through wattage	720 watts	1440W
Type of battery protected	Lead acid, VRLA, SLA, marine, deep discharge, etc. Also applicable to NiMH, NiCad and Lithium Ion where the available cut-off voltages are applicable	Lead acid, VRLA, SLA, marine, deep discharge, etc. Also applicable to NiMH, NiCad and Lithium Ion where the available cut-off voltages are applicable
Nominal Battery Voltage	12 Volts	24 Volts
Size of module	150mm x 70 mm x 50 mm 6 x 2.75 x 2 inches	150mm x 70 mm x 50 mm 6 x 2.75 x 2 inches
Indicators
Output Normal	Green LED	Green LED
Battery Low	Red LED	Red LED
Remote control	Yes	Yes
Remote control function	When the included plug is inserted in its socket, the unit is "on" (the battery is connected) when the connector is shorted and "off" when the connector is open (the battery is disconnected).
Cut-off voltage settings	10.5, 11, 11.5, 11.8 volts	21, 22, 23, 23.6 volts
DIP-Switch setting	See table below
Turn-back-on voltage	12.5VDC independent of the cut-off voltage settings
Protection	Reverse polarity, Ignition load dump, overload, short circuit
Input Connection	10 AWG Red/Black cables with ring terminals
Output Connection	10 AWG Red/Black cables with metal stubs
Cooling	Convection, no fan
Weight	1 lb 5 ounces 600 grams
User's Guide	Link to User's Guide

DIP Switch Settings
SW 1	SW2	12V model	24V model
Off	Off	10.5V	21.0V
Off	On	11.0V	22.0V
On	Off	11.5V	23.0V
On	On	11.8V	23.6V

Questions and Answers

1. Q: What is the intended application?
A: Automatic control over the amount of charge drawn from a battery. This prevents damage to the battery and extends the cycle life.

2. Q: How does the module work?
A: A DIP switch is accessible from the outside of the case. It is set to the desired cutoff voltage. The input leads are connected to the battery and the output leads are connected to the load. When the battery voltage is above the setting the green "operation normal" light is on and the battery can supply current to the load. When the voltage of the battery drops below the threshold setting the red "battery low" light comes on and the load is disconnected from the battery.

3. Q: What size wires should I use?

A: As big as is reasonable. Our web page http://www.powerstream.com/Wire_Size.htm says that the 6 square mm (between 9AWG and 10AWG) is good for 60 Amps for short runs. For longer runs the wires should be larger, for lower current the wires can be smaller or longer.

When using the calculator on our Wire Size page note that the voltage drop only depends on the gauge and the current, not on the input voltage.


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