Specifications

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BATTERY ISOLATORS
BATTERY SELECTOR SWITCHES
Charles Battery Selector Switches allow boaters to choose between any
combination of two batteries. The switch with alternator disconnect is for use when
the batteries are shut off but the engine is still running. The alternator disconnect
eliminates possible damage to the alternator, a valuable assurance that the
alternator is protected. All Charles Battery Selector Switches are ignition protected,
Marine UL Listed and meet US Coast Guard and ABYC standards. All switches are
manufactured with heavy-duty contacts for optimal, reliable performance. 2-year
limited manufacturer’s warranty.
Features
• White polyethylene color with black knob
• Heavy-duty contacts ensure
optimal performance
• Lightweight, compact and easy to install
• Screw caps provide clean installation
• Designed with corrosion-resistant materials
for years of trouble-free use in marine
environments
• Marine UL Listed
Product No. Description
Continuous
Amps
Intermittent
Amps
Weight
93-BS002AD-A
Four position
(2 battery) switch with
Alternator Disconnect
230 345
2 lbs.
93-BS002-A
Four position (2 battery)
switch without Alternator
Disconnect
230 345 2 lbs.
93-BS001-A
On/Off Switch
230
345 2 lbs.
5.5” dia., 2.6” deep
5.5” dia., 2.6” deep
5.5” dia., 2.6” deep
Dimensions
All Charles Battery Isolators are ignition
protected. They feature a heat chamber
design, protective boots on heavy-duty
5/16” battery and alternator studs,
corrosion-resistant casings, are compact
and easy to install. Either leg of the
Charles Battery Isolator handles the
entire alternator output amperage rather
than a portion of the rated load. 1-year
limited warranty, made in the USA.
Using a Battery Isolator
When charging multiple battery banks,
Charles suggests connecting a battery
isolator between the charger and the
batteries. Battery isolators isolate charge
current and stop it from recirculating,
thus preventing one battery from
discharging into a lesser charged battery.
When properly installed within the
system, the alternator remains
connected to the batteries at all times,
eliminating the possibility of damage to
the diodes. Charles Battery Isolators are
built to be robust, with either leg of the
isolator handling the entire alternator
output amperage rather than a portion
of the rated load. Please note that by
inserting a battery isolator into the
system, a voltage drop of approximately
0.7 to 1.5 DC, depending on the charge
current, will occur.
93-BI70/1-A 70
Product No.
Amps
Alternators
Battery
Banks
Dimensions
Weight
93-BI70/2-A 70
93-BI70/3-A 70
93-BI90/2-A 90
93-BI130/2-A 130
93-BI160/2-A 160
93-BI160/3-A 160
93-BI190/2-A 190
93-BI190/3-A 190
93-BI250/2-A 250
11
4.5”x4.875”x3.625” 2 lbs.
12
4.5”x4.875”x3.625” 2 lbs.
13
4.5”x4.875”x3.625” 2 lbs.
12
6.5”x4.875”x3.625” 3.5 lbs.
12
6.5”x4.875”x3.625” 4 lbs.
13
9.75”x4.875”x3.625” 5.5 lbs.
12
7.5”x4.875”x3.625” 4.6 lbs.
12
9.75”x4.875”x3.625”
4.7 lbs.
13
10.5”x4.875”x3.625” 5.5 lbs.
12
10.5”x4.875”x4.125” 5.8 lbs.
93-BI702/3-A 70
23
7.5”x4.875”x3.625” 2 lbs.
+
+
+
-
-
-
12V DC Charging System
including (from top to bottom):
battery charger, battery isolator
and battery bank.