Marine Battery Chargers & Inverters

Marine Battery Chargers - The batteries that power your boat are critical to ensuring a safe and fun trip out on the water. It's no fun boating with a poorly charged or dead battery, whether it be your starting boat battery, trolling motor battery, or house battery. This is why it’s highly recommended that boat owners have an onboard charger to help ensure reliable and long-lasting battery power. Choosing the right marine battery charger is key.
Keep your boat batteries charged with a marine battery charger from Mastervolt, ProMariner, Victron Energy and Guest. Questions or comments on battery chargers for your boat? Check out the FAQ section below for more help choosing the right charger, or contact us here or chat with us below!

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Mastervolt ChargeMaster 24/60-3 Marine Battery Charger - 24V, 60 Amp, 3 Battery Outlets

44020600

Reg Price: $1,075.00

CPlus Price: $1,010.50

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Mastervolt ChargeMaster 12/100-3 Marine Battery Charger - 12V, 100 Amp, 3 Battery Outlets

44011000

Reg Price: $1,355.00

CPlus Price: $1,273.70

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Mastervolt ChargeMaster 24/100-3 Marine Battery Charger - 24V, 100 Amp, 3 Battery Outlets

44021000

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Mastervolt Mass 24V / 50A Marine Battery Charger - 40020506

40020506

Reg Price: $1,669.99

CPlus Price: $1,569.79

Mastervolt Mass 48V / 50A - 48 Volt 50 Amp Marine Battery Charger

40040506

Reg Price: $2,283.99

CPlus Price: $2,146.95

Mastervolt Mass 24V / 75A Marine Battery Charger w/ DNV & Lloyds Certification - 40020756

40020756

Reg Price: $2,579.99

CPlus Price: $2,425.19

ProMar 10 Amp Dual Battery Charger - 12/24V

DISCONTINUED

$110.09

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Gen 3 Pro Sport 20 Marine Battery Charger - 12/24V, 20Amp

DISCONTINUED

$139.99

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Gen 3 Pro Sport 20 Triple Marine Battery Charger - 12/24/36V, 20Amp

DISCONTINUED

$179.99

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Victron Phoenix Smart IP43 Charger 12/50 (3) 120-240VAC Requires 5-15P Mains Cord

PSC125053095

In Stock: 1

Reg Price: $527.00

CPlus Price: $500.65

Victron Energy CCH012060000 Centaur 12/60 Battery Charger 12 Volt 60 Amp

CCH012060000

In Stock: 5

Reg Price: $536.35

CPlus Price: $509.53

Victron Quattro Inverter/Charger 24V DC - 5000W - Dual 100AMP - 120V A INPUT - 120A

QUA245023110

In Stock: 2

Reg Price: $2,909.55

CPlus Price: $2,764.07

Showing 1-12 of 91 item(s)

Commonly asked questions to help you choose the right charger.

What size marine battery charger do I need?

You need a charger with enough capacity to run the continuous loads on your battery system, like DC refrigeration and lights, plus enough power to float-charge your batteries. Good rule is to have enough amperage to equal sum of the DC loads plus 10 percent of the amp-hour capacity of the batteries.

How long does it take to charge?

If you operate your house bank between a 50 % and 85 % state of charge, as many experts recommend, and charge once daily, you should be able to return the 35 % of battery capacity by operating a properly-sized alternator for slightly over an hour. More deeply discharged batteries, or smaller alternators, will require more time.

What are the differences between portable and onboard chargers?

Portable chargers work well for smaller boats, where the battery can be easily removed. Owners of larger vessels are better off purchasing on-board marine battery chargers.

How many banks do I need on my marine battery charger?

Depends on how many batteries you need to charge. You need one bank for each battery on your boat (including starting battery, if appropriate).

What does it mean to wire boat batteries in series vs parallel?

Main difference in wiring batteries in series vs. parallel is impact on the output voltage and the capacity of the battery system. Batteries wired in series have their voltages added together. Batteries wired in parallel have their capacities (amp-hours) added together. However, the total available energy (watt-hours) in both configurations is the same.

What amp rating do I need for my battery charger?

Amps required depend on the size and type of your battery. A higher amp rating means a faster recharging time. For instance, 15 amps per bank would charge a battery faster than 5 or 6 amps per bank would charge that same battery. Follow the formula above to determine minimum amperage of the marine battery charger required.

What voltage will I need?

The voltage of your boat's battery charger needs to match the output voltage of your battery. 12V batteries require a 12V charger. Same applies to two 12V batteries in PARALLEL - voltage does not double, you still need a 12V battery charger. However, two 12V battery chargers in a SERIES setup will now double to 24V, and youu2019ll need a 24V charger. Mismatching voltages between charger and batteries will end up destroying the batteries, and may even cause a fire.

Have more questions? Contact Us

If you have any more questions, just shoot us an email, give us a call, or chat with us below, and we'll help figure out what marine battery charger would work best for your onboard needs!