Dolphin Charger DC-DC Converter - 12/36V - 20A [99204]
SKU: 3379909401

Dolphin Charger DC-DC Converter - 12/36V - 20A [99204]

Sale price$297.43 Regular price$330.48
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

Dolphin Charger DC-DC Converter - 12/36V - 20A [99204]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

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.


Quick Guide (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 3379909401

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MKR
Birmingham, US
★★★★★ 5
Desk grommet used on entertainment wall
Size: 50mm/2inch, Color: Black, Number of Items: 4, Size: 50mm/2inch, Color: Black, Number of Items: 4
I used this grommet for the entertainment center wall behind my TV and it looks good and works great. Came with all the tools I needed to cut the hole in the wall and install it.
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Reviewed in the United States on November 8, 2025
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Jamz-
Bozeman, US
★★★★★ 4
Looks good in desk
Size: 50mm/2inch, Color: Black, Number of Items: 2
Made nice clean hole and inserts look and work well
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Reviewed in the United States on April 30, 2026
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Peter
Birmingham, US
★★★★★ 5
Fits and works just as expected
Size: 50mm/2inch, Color: Black, Number of Items: 4
I bought these to provide a snug fit for an EV charging cable running through my garage wall. They worked perfectly to keep out drafts and crawly things. Highly recommended.
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Reviewed in the United States on May 1, 2026
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Thomas G.
Louisville, US
★★★★★ 5
Worth the money!
Size: 50mm/2inch, Color: Black, Number of Items: 2
This kit is great. I bought this because I know that the seller paired the cutting tool to be the perfect size and it was! Not just that, but the hole cutter was well done and cut thru the 3 layers - laminate, plywood and particle board with ease. The only thing that I would do different, is go to 3" next time. 2" was very tight when running the 2 @ 120 volt cord ends through the cap.
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Reviewed in the United States on December 5, 2025
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Lyric
Lake Worth, US
★★★★★ 5
Nice Floating Shelves
Color: Oak, Size: 24" W x 7" D x 1.5" H (2 pieces), Color: Oak, Size: 24" W x 7" D x 1.5" H (2 pieces)
I wasn't sure how to fill this space between my kitchen cabinets, and I think these shelves turned out looking great and fit the space nicely. They were easy to install, good quality, and could handle a decent amount of weight.
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Reviewed in the United States on March 26, 2026

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