Specifications are subject to change. See bluesea.com/P12 for current information.
Specifications
5
P12
7521 AND 7522 BATTERY CHARGERS
* Consult battery manufacturer specifications for other battery types to avoid damage. Do not mix battery types.
** Battery bank sizes are tested to California Energy Commission compliance (CEC). Larger and smaller size banks could charge well, but consume slightly
more power over the charging cycle.
Regulatory
Designed and constructed for compliance to UL-1236 Marine, CSA 22.2 No. 107.2, and ABYC A-31 standards. Ignition Protection per ISO 8846, and SAE J1171.
Meets FCC Part 15, Class B requirements. To view all regulatory specifications visit www.bluesea.com/P12.
Blue Sea Systems’ P12 Battery Chargers are designed and tested to comply with California Energy Commission (CEC) efficiency requirements and, ship with
these settings by default. The energy saving feature may be disabled by the user following the steps on page 14 of this manual.
Mounted vertically as shown in this manual, P12 chargers are Ingress Protection rated: IP-32. The first number, “3” means protected against entry of solid
objects Ø2.5mm and larger (most wires and tools). The second number “2” means protected against vertically falling drops of water (drip proof).
7521 7522
Total Output Current 25A 40A
Input AC Current 4.5A @ 100V AC / 2.25A @ 200V AC 7.5A @ 100V AC / 3.75A @ 200V AC
Nominal Output Voltage 12V DC 12V DC
Output Connections 3 positive, 1 negative 3 positive, 1 negative
Universal AC Input Voltage 90V–265V AC 90V–265V AC
Input Frequency Range 50/60 Hz 50/60 Hz
Typical Float Voltage 13.5V DC 13.5V DC
Maximum Available Voltage 16.0V DC 16.0V DC
Output Voltage Accuracy 0.05V DC 0.05V DC
Minimum Operating Temperature −20°C (−4°F) −20°C (−4°F)
Maximum Operating Temperature 70°C (158°F) 70°C (158°F)
Minimum Storage Temperature −30°C (−22°F) −30°C (−22°F)
Maximum Storage Temperature 80°C (176°F) 80°C (176°F)
Warranty 5 Year 5 Year
Battery Types* Flooded, Gel, AGM, TPPL (Thin Plate Pure Lead) Flooded, Gel, AGM, TPPL (Thin Plate Pure Lead)
Recommended for Battery Bank Sizes**
60Ah Minimum, Example: 1 x Group 24
330Ah Maximum, Example: 3 x Group 31
60Ah Minimum, Example: 1 x Group 24
440Ah Maximum, Example: 4 x Group 31
Conductor Length in feet (meters) Charger Rating
25A 40A
6 ft (1.83 meters) 14 AWG (2.5mm²) 8 AWG (10mm²)
10 ft (3.05 meters) 12 AWG (4mm²) 8 AWG (10mm²)
15 ft (4.57 meters) 10 AWG (6mm²) 6 AWG (16mm²)
20 ft (6.09 meters) 8 AWG (10mm²) 6 AWG (16mm²)
25 ft (7.62 meters) 6 AWG (16mm²) 4 AWG (25mm²)
Recommended Battery Fuse
30A 60A
Region Line Neutral Ground (Earth)
North America Black White Green
Europe Brown Blue Green-Yellow
Australia/ New Zealand Brown or Red Blue or Black Green-Yellow
Table A: Minimum Recommended Wire Size*
Appropriate Fuses and Fuse Holders Charger Rating
Fuse Type Fuse Holder 25A 40A
MRBF Terminal Fuses 5191 Terminal Fuse Block 5175 (30A Fuse) 5178 (60A Fuse)
AMI®/MIDI® Fuses 7720 Safety Fuse Block 5250 (30A Fuse) 5253 (60A Fuse)
Table B: Recommended DC Circuit Protection
Table C: Typical AC Regional Wire Colors
Table D: AC Wire - Circuit Protection Selection Chart
7521 (25A) 7522 (40A)
Input Watts 450 750
120V AC Application 4.5A @ 100V AC 7.5A @ 100V AC
Minimum AC Wire Size 18 AWG (0.75mm²) 16 AWG (1.5mm²)
Circuit Breaker 10A 15A
230V AC Application* 2.25A @ 200V AC 3.75A @ 200V AC
Minimum Wire Size 18 AWG (0.75mm²) 18 AWG (0.75mm²)
Circuit Breaker 5A – 10A 5A – 10A
* Typical of Europe
Type Absorb Volts Float Volts
FLA – Flooded Lead Acid 14.5V 13.5V
AGM – Absorbed Glass Mat 14.35V 13.3V
Gel – Gelled Electrolyte 14.1V 13.5V
TPPL – Thin Plate Pure Lead 14.7V
13.6V¹
User Adjustable 12.5V Default 12.5V Default
¹ Taken from Odyssey Tech Notes, Northstar operation Manual
Table E: Default Voltages by Battery Type
Batteries should match in chemistry, although many AGM’s and flooded batteries are
compatible. Based on 25°C (77°F)
* Based on 3% voltage drop. If fast charge recovery is important, use larger wire. Double the conductor
length entry to get a 1.5% drop, triple the conductor length to get a 1% voltage drop.
