8
P O W E R C O N V E R S I O N
PN Description Volts Amps Output
Recommended
Mounting
Clearance
[
A
]
Width in (mm)
Recommended
Mounting
Clearance
[
B
]
Height in (mm)
7521 Battery Charger 12V DC 20A 3 11.66 (296.16) 16.3 (414.02)
7522 Battery Charger 12V DC 40A 3 11.66 (296.16) 16.3 (414.02)
7523 Battery Charger 12V DC 60A 3 11.66 (296.16) 18.27 (464.06)
Applying two decades of electrical product design and manufacturing expertise,
Blue Sea Systems has developed the PACIFIC SERIES Battery Chargers.
Research and testing of existing battery chargers revealed several shortcomings impacting
the performance, and ultimately the experience, customers had with their product.
Blue Sea Systems has improved charger performance by focusing on environmental
factors, electronic design, and technical support.
The PACIFIC SERIES Battery Chargers, with their advanced multistage charging technology,
are engineered to perform in harsh conditions.
Environment
Boats operate in challenging environments for any electrical or electronic device. The three
conditions causing the greatest problems for chargers are moisture, heat, and low quality
AC input voltage.
To combat moisture, the PACIFIC SERIES Battery Chargers have a drip-proof design with an
integrated venting system protecting them from wipe downs and drips.
Heat is one of the greatest enemies of a battery charger. It stresses the electronic
components and can cause premature failure. Instead of plastic or sheet metal cases,
the Pacific Series’ rugged, finned aluminum case dissipates heat and leads to longer
battery charger life.
Low quality AC voltage can compromise many battery chargers. To overcome this, Blue Sea
Systems developed Input Power Response (IPR) to match the charge output to the quality
of the AC voltage input which reduces component stress.
Electronic Design
PACIFIC SERIES Battery Chargers use modern MOSFET circuitry instead of diodes for
output power distribution. If diodes are used for this purpose, lower voltage is supplied to
the battery requiring the most charge and higher voltage to the batteries that may already
be charged, when equivalent voltages are required for optimum charging. MOSFETs improve
efficiency, reduce heat and allow the PACIFIC SERIES Battery Chargers to offer these
additional advantages:
1. Capability for multiple battery chemistries (such as a mix of flooded
and gel batteries): PACIFIC SERIES Battery Chargers vary absorption stage voltage
according to the chemistry selected by the user for each of the three battery banks.*
This extends battery life and increases performance by providing each battery bank
with the voltage specified for its particular chemistry.
* Up to 0.5V difference between absorption voltages can be achieved.
2. Optimum charging of different battery bank sizes with different charge states:
PACIFIC SERIES Battery Chargers vary absorption stage time according to the size and
charge state of each battery bank to reduce overcharging.
3. Compensation for voltage drop in cables from the charger to the batteries:
Conventional battery chargers sense battery voltage at the charger, while the voltage at
the battery terminal is lower by the amount of voltage drop in the charging cables,
resulting in longer charge times than necessary. PACIFIC SERIES chargers allow the
user to compensate for this drop for faster charge times while not overcharging other
connected battery banks.
Support
Battery charger status and fault conditions are typically indicated using a single ON LED
or a combination of LEDs and simple onboard voltmeters. Deciphering the blinking lights,
meters, and complex labels on many existing battery chargers is challenging. Poor status
indication can lead to the misdiagnosis of a fault, resulting in costly repairs
or replacement.
Blue Sea Systems’ PACIFIC SERIES Battery Chargers have an integrated multi-language
display for easy setup, monitoring, and diagnostics. This important feature ensures faults
are easily identified and corrective procedures explained. An optional remote monitor offers
a display and control at a navigation center or helm. With the purchase of a shunt, the
remote monitor will also display amp hours and battery state of charge for one
battery bank.
When assistance is required, poor technical support can occupy hours of time and cause
frustration. Blue Sea Systems technical support is the company’s priority. Members of the
management and engineering teams spend one hour every weekday providing product
support. Blue Sea Systems' foundation of customer care and technical support comes
with every PACIFIC SERIES Battery Charger.
PACIFIC SERIES Battery Chargers
[
A
]
[
B
]
Specifications subject to change. See bluesea.com for current information.
Mounting Clearance Diagram
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