VARTA Professional Deep Cycle AGM Batteries

Professional Deep Cycle AGM: the same product, Varta's new naming

In 2025 Varta restructured its catalogue and stopped naming its batteries by colour or series to name them by technology. If you used to look for this battery by its former leisure and service range name, you should know that "Professional Deep Cycle AGM" is exactly the same deep-cycle family as always, now with a name that directly describes what it does. Neither the product nor its quality has changed: only the way it is named.

In other words, the customer arriving in search of Varta's former Professional deep-cycle AGM range is in the right place. We keep the name Professional Deep Cycle AGM so there is no confusion: you are asking for the same thing as before, with the same deep-cycle AGM technology and the same brand guarantee. If you had noted down an old reference, you can still use it to locate your model within this category.

What deep-cycle AGM technology is

AGM stands for Absorbent Glass Mat. In these batteries the electrolyte is not free-flowing liquid but held in a thin glass-fibre mat between the plates. This brings very specific advantages for onboard use:

• Sealed and maintenance-free: no need to top up water or watch levels.
• Spill-proof: with no free acid, they can be fitted in enclosed spaces and in different positions, which is key in boats and motorhomes.
• Resistant to vibration and knocks: ideal for the sea and for roads with uneven surfaces.
• Deep cycling: they cope with being deeply discharged and recharged many times without degrading the way a starter battery would.

"Deep cycle" is exactly what you need when the battery works as an auxiliary service supply: it discharges gradually to power your equipment and charges again, cycle after cycle, throughout its service life.

Advantages of choosing a Varta Professional Deep Cycle AGM

• Real autonomy: more hours of energy for your loads without starting the engine.
• Varta reliability: one of the world's benchmark battery brands, with factory quality control.
• Long cycling life: designed for hundreds of charge and discharge cycles.
• Flexible, safe installation: sealed, with no gassing in normal use and suitable for indoor mounting.
• Efficient recharging: they readily accept charge from the alternator, solar panels or a dockside charger.

How to choose the right battery

To get your marine and motorhome battery right, look at these points:

• Capacity (Ah): the more amp-hours, the more autonomy. Work out the daily consumption of your equipment and choose with a margin.
• Battery dimensions: check the length, width and height so it fits the existing space or tray.
• Terminals and polarity: check the terminal type and the position of the posts (positive/negative) so you can connect without trouble.
• Intended use: pure auxiliary service, or mixed starting/service.

If you are unsure about the dimensions or the compatible model, you can use the registration finder on the website: enter your motorhome's registration and we will show you the batteries that fit. That way you avoid mistakes in size or capacity before buying.

Is the Professional Deep Cycle AGM the same as Varta's old deep-cycle range?

Yes. With the 2025 restructuring, Varta moved to naming its batteries by technology. The Professional Deep Cycle AGM is the same deep-cycle AGM service family that already existed; only the name changed, not the product.

Can I use this battery to start the engine?

They are optimised for deep-cycle service (powering equipment through deep discharges). Some allow mixed use, but if your priority is starting, a dedicated starter battery is better. Check each model's data sheet.

Does an AGM battery need maintenance?

No. They are sealed, maintenance-free batteries: there is no need to add water or check electrolyte levels. Simply keep them well charged.

How do I know which capacity and size I need?

Add up the daily consumption of your equipment to estimate the Ah and measure the installation space. If you have a motorhome, use the registration finder on the website to see compatible models.

Discover our Varta Professional Deep Cycle AGM selection

Explore the products in this category below and choose the Varta Professional Deep Cycle AGM battery that best suits your boat or motorhome. Reliable energy, deep-cycle AGM technology and the backing of a leading brand so you can enjoy your trips without running out of power.