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Blue Sea Systems Battery Charger 7521

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P12 25A Battery Charger 12V DC 7521 - Blue Sea Systems

Product Condition: NEW
Blue Sea Systems Battery Charger 7521
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

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The Blue Sea Systems P12 25A Battery Charger 12V DC model 7521 is dry mount device designed for use in marine applications and other harsh environments where reliability, ease of use, and high performance are of primary importance. It is also designed to charge three electrically independent batteries or battery banks. The P12 has the unique capability to individually move each battery out of the Absorption charging stage. This ensures batteries near their full charge do not continue to receive high constant voltages necessary in the Absorption stage.


The P12 Battery Charger integrates 5 critical features which enable batteries to charge according to manufacturers' recommendations:

  1. User Defined Charge Profiles for setting voltages to match the battery manufacturer’s recommendations
  2. User Defined Absorption Stage Values determine when the charger should exit Absorption Stage in order to prevent overcharging
  3. Charge Coordination™ integrates with Blue Sea Systems’ Automatic Charging Relays to separate battery banks while the P12 is operational
  4. PreFloat™ Stage prevents over charging by individually moving batteries out of Absorption Stage
  5. Battery Temperature Compensation adjusts charging voltage up (for colder batteries) or down (for warmer batteries) as recommended by battery manufacturers for proper battery performance



  • Rugged finned aluminum case dissipates heat
  • Universal line voltage 90–265V AC, 45–65 Hz for worldwide use
  • Large bright full graphic control screen with user interface
  • Plain-language text in English, French, Italian, German and Spanish
  • Intuitive screens provide fault alerts and plain language diagnostics



  • Part No.: 7521
  • Total Output Current: 25A
  • Input AC Current: 4.5A @ 100V AC / 2.25A @ 200V AC
  • Maximum Output Voltage: 16.0V DC
  • Nominal Voltage: 12V DC
  • Ignition Protected: Yes
  • Number of Outputs: 1 negative • 3 positive
  • Universal AC Input Voltage: 90-265V AC
  • AC Input Frequency: 45-65Hz
  • Output Voltage Accuracy: 0.05V
  • Typical Float Voltage: 13.5V DC
  • Minimum Operating Temperature: -20° C
  • Maximum Operating Temperature: 70° C
  • Minimum Storage Temperature: -30° C
  • Maximum Storage Temperature: 80° C
  • Battery Types: 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
  • Height: 13.03in (330.96 mm)
  • Width: 8.46in (214.88 mm)
  • Depth: 3.66in (92.96 mm)
  • Weight: 13.00lb (5.9 kg)
  • Warranty: 5 Years

Additional Information

Product Condition NEW
upc 632085075217

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