| Specifications |
| P12 | |
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| 7521 AND 7522 BATTERY CHARGERS | ||
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| 7521 | 7522 |
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| Total Output Current | 25A | 40A | |
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| Input AC Current | 4.5A @ 100V AC / 2.25A @ 200V AC | 7.5A @ 100V AC / 3.75A @ 200V AC | |
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| Nominal Output Voltage | 12V DC | 12V DC |
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| Output Connections | 3 positive, 1 negative | 3 positive, 1 negative | |
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| Universal AC Input Voltage | |||
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| Input Frequency Range |
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| Typical Float Voltage | 13.5V DC | 13.5V DC | |
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| Maximum Available Voltage | 16.0V DC | 16.0V DC | |
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| Output Voltage Accuracy | 0.05V DC | 0.05V DC | |
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| Minimum Operating Temperature | −20°C (−4°F) | −20°C (−4°F) |
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| Maximum Operating Temperature | 70°C (158°F) | 70°C (158°F) | |
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| Minimum Storage Temperature | −30°C (−22°F) | −30°C (−22°F) | |
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| Maximum Storage Temperature | 80°C (176°F) | 80°C (176°F) | |
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| Warranty | 5 Year | 5 Year | |
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| Battery Types* | Flooded, Gel, AGM, TPPL (Thin Plate Pure Lead) | Flooded, Gel, AGM, TPPL (Thin Plate Pure Lead) | |
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| Recommended for Battery Bank Sizes** | 160Ah Minimum, Example: 2 x Group 27 | 220Ah Minimum, Example: 2 x Group 31 | |
| 330Ah Maximum, Example: 3 x Group 31 | 440Ah Maximum, Example: 4 x Group 31 |
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*Consult battery manufacturer specifications for other battery types to avoid damage. Do not mix battery types.
**Battery bank sizes are recommended for optimal charging
Regulatory
Designed and constructed for compliance to
Table A: Minimum Recommended Wire Size*
Conductor Length in feet (meters) | Charger Rating | |
| 25A | 40A |
6 ft (1.83 meters) | 14 AWG (2.5mm²) | 8 AWG (10mm²) |
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10 ft (3.05 meters) | 12 AWG (4mm²) | 8 AWG (10mm²) |
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15 ft (4.57 meters) | 10 AWG (6mm²) | 6 AWG (16mm²) |
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20 ft (6.09 meters) | 8 AWG (10mm²) | 6 AWG (16mm²) |
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25 ft (7.62 meters) | 6 AWG (16mm²) | 4 AWG (25mm²) |
Recommended Battery Fuse | 30A | 60A |
*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.
Table D: AC Wire - Circuit Protection Selection Chart
| 7521 (25A) | 7522 (40A) |
Input Watts | 450 | 750 |
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120V AC Application | 4.5A @ 100V AC | 7.5A @ 100V AC |
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Minimum AC Wire Size | 18 AWG (0.75mm²) | 16 AWG (1.5mm²) |
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Circuit Breaker | 10A | 15A |
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230V AC Application* | 2.25A @ 200V AC | 3.75A @ 200V AC |
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Minimum Wire Size | 18 AWG (0.75mm²) | 18 AWG (0.75mm²) |
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Circuit Breaker | 5A – 10A | 5A – 10A |
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* Typical of Europe |
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Table B: Recommended DC Circuit Protection
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) |
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AMI®/MIDI® Fuses | 7720 Safety Fuse Block | 5250 (30A Fuse) | 5253 (60A Fuse) |
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Table C: Typical AC Regional Wire Colors
Region | Line | Neutral | Ground (Earth) |
North America | Black | White | Green |
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Europe | Brown | Blue | |
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Australia/ New Zealand | Brown or Red | Blue or Black | |
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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)
Type | Absorb Volts | Float Volts |
FLA – Flooded Lead Acid | 14.5V | 13.5V |
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AGM – Absorbed Glass Mat | 14.35V | 13.3V |
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Gel – Gelled Electrolyte | 14.1V | 13.5V |
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TPPL – Thin Plate Pure Lead | 14.7V | 13.6V¹ |
User Adjustable | 12.5V Default | 12.5V Default |
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¹Taken from Odyssey Tech Notes, Northstar operation Manual
Specifications are subject to change. See bluesea.com/P12 for current information. | 5 |
