99204 - Dolphin Charger 12V 20A DC Converter | Aztek Computers
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SKU: PKGTX6QNFS |  Mfg. Part: 99204  | UPC: 786142992044  |  0 Reviews  |     Share Make an offer

99204 - Dolphin Charger 12V 20A DC Converter

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$696.81  $940.69
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Product Overview

DC-DC Converter - 12/36V - 20A

Your boat has a 12V alternator, and you need to charge a 24V or 36V battery “on the run”? Dolphin has the solution. Our boosters are true DC/DC chargers with a 3-stage smart charge feature. Compatible with 4 different technologies, including Gel, AGM, or Lithium LIFEPO4. Dolphin booster is the perfect choice to charge your bow thruster or trolling motor batteries!

Flexibility & Versatility

BOOSTER units are designed to charge a 24V, 36V, or 48V auxiliary battery from a single 12V or 24V power system, ideal for new installations or for updating older systems. Thanks to recharging during navigation, auxiliary batteries are always available. No need to wait until you’re connected to the shore to recharge. This product range extends from 12/24V (charging at 30A), 12/36V (charging at 20A) up to 24/48V (charging at 15A).

Efficient Power Conversion

Small is beautiful: our engineers have made it compact. BOOSTER is only half the size of a conventional charger of equivalent power!

Faster Charging Times

BOOSTERS are intelligent marine battery chargers featuring an advanced and unique 4-stage charging program. This reduces charging time by 50% compared with charging from a basic alternator. with different battery chemistry settings (Lead, Gel, AGM, Lithium, LifeFO4).

Compatibility with Different Voltages

BOOSTERS are smart battery chargers featuring four different battery profile, Lead, Gel, AGM, and Lithium LifeFO4.

Protection Features

BOOSTER units include automatic protection against battery source drainage, over-current, over-voltage and reverse polarity and built-in fuses protections.

As for all other Dolphin® charger products, the BOOSTER’s assembly process includes conformal coating of the electronic board (PCB) to guarantee an extended lifecycle of your battery charger.

Expert Overview

The Dolphin Charger 99204 is a DC-DC converter designed for IT and marine applications requiring efficient auxiliary battery charging from an existing power system. This unit facilitates charging of 24V or 36V auxiliary batteries from a 12V power source. It is suitable for environments where a 12V alternator is the primary power source and higher voltage batteries, such as those for bow thrusters or trolling motors, need to be maintained. The converter employs a 3-stage smart charge feature and is compatible with Gel, AGM, and Lithium LiFePO4 battery chemistries. It offers protection against battery source drainage, over-current, over-voltage, and reverse polarity, alongside built-in fuse protection. The compact design allows for integration into new or updated systems where space may be a consideration. Conformal coating on the electronic board contributes to an extended product lifecycle.

Product Details

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  • Dolphin Charger
  • 99204
  • 786142992044
  • New
  • 4.4 lbs
  • 11 X 5 X 7
  • Jul 21, 2026
  • Mar 15, 2026
Product Identifiers: Brand: Dolphin Charger • Part #: 99204 • UPC: 786142992044 • Category: Battery Chargers

Frequently Asked Questions

What battery voltages can this DC-DC converter charge?

This DC-DC converter is designed to charge 24V or 36V auxiliary batteries. It operates by converting power from a 12V source.

What battery chemistries are compatible with this charger?

The Dolphin Charger 99204 is compatible with four different battery chemistries: Lead, Gel, AGM, and Lithium LiFePO4.

What are the primary use cases for this DC-DC converter?

This converter is suitable for charging bow thruster or trolling motor batteries from a 12V alternator, particularly in marine applications where auxiliary batteries need to be charged while underway.

What protection features are included with this unit?

The BOOSTER units include automatic protection against battery source drainage, over-current, over-voltage, reverse polarity, and built-in fuses.

99204 - Dolphin Charger 12V 20A DC Converter

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$696.81