Become independent with a smart home battery
Discover how a smart home battery, combined with solar panels, can drastically reduce your energy bill. Benefit from maximum self-sufficiency and minimal energy costs.
Plug & play, stackable to your needs
From compact entry-level model to fully extended system — the Marstek collection grows with your energy needs. Choose the number of modules that suits your consumption and start saving today.
Doubting which product suits you best? Request free advice →
Why choose LaagKW?
Concrete, honest, and without promises we can't keep.
We focus on battery systems — plug & play and professional installations. That's all we do, and we do it well.
No chatbot, no call center. Just an honest conversation about what works best for you.
We only work with brands we trust ourselves — Marstek, Pylontech, Dyness, Leapton, and Atmoce.
Certified mechanics, clean delivery, and always available if something comes up.
From order to immediate savings
Whether you opt for plug & play or a system with installation — we guide you from A to Z.
Plug & Play — self-installation
Order your battery
Choose the model and number of modules via our webshop. Delivery within 3 working days to your door.
Plug into wall socket
No installer needed. Plug the Venus A into the wall socket and connect the P1 meter to your smart meter.
Open the Marstek app
Set your charging strategy via the app: solar prioritization, dynamic tariffs, or manual.
Save immediately
The battery charges during the day and provides free electricity in the evening. You can see everything in real-time in the app.
System with installation
Free consultation
We discuss your situation and energy needs and put together the best system.
Custom quote
You receive a clear quotation with no hidden costs — including installation and materials.
Professional installation
Our certified technician installs the system and connects it to your solar panels.
Delivery & aftercare
After installation, we will explain everything and be available for questions. Includes a 10-year warranty.
The more you fill in, the more accurate your quote will be.
Dit bepaalt de maximale teruglevercapaciteit van uw installatie.
Zie uw jaarnota of energierekening
Heeft u al panelen? Vul dan in hoeveel u teruglevert.
So that we can personally contact you for your free roof analysis.
Door te verzenden gaat u akkoord met onze privacyverklaring. Wij delen uw gegevens nooit met derden.
Bedankt, . We nemen binnen 1 werkdag contact met u op voor uw gratis dakanalyse en offerte op maat.
Do it yourself or fully taken care of?
Everyone has a different situation. That's why we offer two paths — both equally valid.
Do you want to store energy quickly and easily without an installer? Our plug & play batteries are ready for immediate use.
Looking for a powerful and professional solution? We advise on, supply, and install complete battery systems.
No problem. Let us take a look with you — with no obligation and no sales pitch.
What our customers say
No fancy talk — just honest experiences from people like you.
"The plug & play battery was installed within 5 minutes. My energy bill dropped by €85 in the first month alone. Should have done this much sooner."
"Finally, a company that's just honest. They didn't promise the world, but the savings are even higher than expected. Over 1,200 euros cheaper per year."
"Good service, quick installation. The consultation took less than half an hour, yet they calculated everything thoroughly. I recommend it to everyone."
All you need to know
Still in doubt? Here are the most honest answers to the most frequently asked questions about home batteries.
Yes. A plug & play home battery connects to a standard power outlet (230V). You don't need to make any modifications or hire an electrician. All you do is plug it into the socket, set up the app — and you're done. Suitable for renters and owners.
Yes. Our batteries are CE certified and comply with all European safety standards. They are equipped with built-in protection against overvoltage, overheating, and short circuits. You can safely use them indoors.
That depends on your consumption and the battery capacity. A household with solar panels and a 3 kWh battery can save an average of €300–500 extra per year on top of the savings from the panels alone. Over 10 years, that quickly amounts to €3,000–5,000.
No, it's not mandatory. You can also charge a battery with cheap off-peak electricity (dynamic tariff) and use it during the day. However, the biggest savings are made when you combine the battery with your own solar panels.
Absolutely. Our plug & play line is modular. Start with the Compact and later switch to the Plus or Pro. This way, you can adapt your system to your situation and budget.
Our batteries have an expected lifespan of 10–15 years, depending on usage and type. We provide a minimum 10-year product warranty. After that period, most batteries still perform at 80% of their original capacity.
Home batteries are currently not eligible for direct subsidies. However, VAT on solar panels is 0%, and there are schemes for heat pumps (ISDE). We will inform you about all current schemes during the consultation.
Ready to get started with smart energy storage?
Choose a plug & play battery you can order today — or request a free consultation for a custom solution.
Obligation-free consultation · No sales pitches · Direct, honest advice