Power & energy for boats, campers and off-grid living

Find the right setup for battery banks, charging, inverters, shore power and monitoring – all in one place.
Se batterier Se ladere Brug beregner

Shop by category

Choose a category and find exactly what you need.

Batterier

Batteries

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Lithium, AGM and gel for reliable onboard power.
Invertere & ladere

Inverters & chargers

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Power your setup – charge batteries, convert to 230V and keep your system running.
Sol & vindenergi

Solar & wind power

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Become self-sufficient with power – solar panels, wind turbines, MPPT controllers and mounting.
Batteriovervågning & styring

Battery monitoring & control

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Monitor your power usage and control your system with accurate data.
Kabler & installation

Cables & installation

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Cables, terminals, fuses and accessories for safe electrical installation.
Landstrøm

Shore power

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Connect to power in port – cables, plugs and safe 230V onboard solutions.
Help choosing the right setup

What do you need help with?

Pick your situation and we will guide you to the right products and setup.

I am building a new electrical system

Get an overview of chargers, inverters and how to build the electrical system correctly.

Se opladning & inverter

I want to upgrade the battery bank

Explore lithium, AGM and gel batteries and get help choosing capacity and charging.

Se batterier

I want solar power onboard

Explore boat solar solutions and size panels, MPPT and expected production.

Se solceller til båd

Why choose SejlStrøm?

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Danish support before and after purchase

Get help from specialists who understand boats and installations.

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Solutions for boats, campers and off-grid living

Equipment and systems that work in real-world conditions – even without shore power.

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Get the right setup the first time

I help you choose the right solution from the start – avoiding costly mistakes.

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Calculators and guides that make it easy

Use our tools to correctly size batteries, cables and overall power consumption.

Brug strøm- og solcelleberegner

Guides and calculators

Get clarity on sizing, cable choice and power consumption before you buy.

Power and solar calculator
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Cable calculator
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Onboard electrical system
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