Batteries for boats, campers and off-grid

Find the right battery for your setup – lithium, AGM and gel for both small and large installations.
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Choose the right battery type

Compare the most relevant battery types for boats, campers and off-grid setups.

Lithium batteries
For modern electrical systems

Lithium batteries

Low weight, high usable capacity and long service life make lithium the natural choice for modern power systems in boats, campers and off-grid setups.
  • Up to 90% usable capacity
  • Fast charging
  • Low weight
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AGM batteries
Simple and reliable

AGM batteries

Choose AGM for classic installations and lower consumption. A robust and maintenance-free solution that works reliably in most boats and campers.
  • Around 50% usable capacity
  • Maintenance-free
  • Reliable solution
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Gel batteries
Stable usage

Gel batteries

Choose gel if your power usage is steady and predictable. A solid, maintenance-free option suited for consistent loads over time.
  • Around 70% usable capacity
  • Maintenance-free
  • Stable under steady use
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Help choosing the right battery

What should you choose?

Different battery types suit different needs. Here is a quick rule of thumb.

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Lithium batteries – maximum performance

High capacity, low weight and fast charging make lithium the ideal choice for modern setups and higher power usage.

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AGM batteries – simple setup

A reliable and maintenance-free choice for classic installations and lower power consumption.

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Gel batteries – stable usage

Well suited for steady power consumption and long-term use where stability is important.

Why buy batteries from SejlStrøm?

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Personal guidance

I help you choose the right battery based on your setup and power consumption.

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Proven solutions

I don’t just sell batteries – I help you build a system that works in real life.

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Selected for marine & off-grid

Products are carefully selected for boats, campers and off-grid use – not random webshop items.

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Fast delivery

Fast delivery in Denmark and support before and after your purchase.

Guides and help choosing batteries

Learn more about capacity, installation and choosing the right battery type.

Onboard electrical system guide
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Onboard electrical system guide
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Onboard electrical system guide
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