What Is a Robotic Pool Cleaner?

A robotic pool cleaner is a self-contained, electrically powered device that automatically scrubs and vacuums your pool while filtering the water - without relying on your pool's existing pump or filtration system. Plug it in or charge the battery, drop it in the water, and it navigates your pool independently: scrubbing the pool floor, climbing the walls, and cleaning the waterline in a single automated cycle. The result is a consistently clean pool with less time, energy, and chemical consumption than obsolete pool maintenance approaches require.

Robotic pool cleaners are the most popular technology for cleaning pools, and for good reasons. They outperform suction and pressure alternatives on cleaning thoroughness, energy efficiency, and ease of use - and today's models range from straightforward plug-and-clean units to Wi-Fi-connected robots you can schedule from your phone.

How Does a Robotic Pool Cleaner Work?

Unlike suction cleaners that draw power from your pool pump or pressure cleaners that rely on pressurized water from the return line, a robotic pool vacuum operates on its own low-voltage power supply. You connect it to a standard electrical outlet via a floating cable, drop the robot into the pool, and it takes over - navigating systematically, scrubbing debris loose from pool surfaces, and pulling it into an internal filter basket. When the cycle ends, you lift it out, rinse the filter, and store it. The pool's pump and filtration system are not involved at any point. That means that you will save a lot of electricity, water, have a cleaner pool, and when your pool filter is clogged, the pool will still be clean.

Navigation, Scrubbing, and the Cleaning Cycle

Modern robotic pool cleaners use intelligent navigation systems to ensure maximum coverage. Rather than moving at random, the robot follows a systematic pattern, sometimes in a “maze” pattern that covers irregular pools best, and sometimes in line-by-line patterns apt for rectangular pools. Most robots clean the floor, while some can also scrub algae from the walls and clean the waterline. Maytronics has developed technology to also clean stairs, while most robots go over stairs without actually cleaning them. Cleaning cycles range between 1.5 and 4 hours, depending on pool size and the cleaning mode selected. Specialty modes (such as waterline-only or wall-only cycles) run shorter and target specific areas when spot cleaning is needed.

What Does a Robotic Pool Cleaner Clean?

One of the defining advantages of a modern robotic pool cleaner over older automatic pool cleaner designs is the range of surfaces covered in each uninterrupted cycle. Where suction and pressure cleaners are largely floor-only tools that cannot scrub algae and bacterial biofilm, most mid-range and premium robotic cleaners are built to address almost every pool surface and clean the most stubborn, growing residuals.

Pool Floor and Walls

Every robotic pool cleaner cleans the pool floor - including corners, crevices, and the transition between the floor and walls. Capable models use traction drive systems that allow the robot to climb straight up the pool wall, continuing the scrubbing cycle across the entire vertical surface. Algae grows on walls and takes a long time to clean manually. Wall-climbing capability varies by robot model and is one of the most important specifications to check before purchase.

Waterline and Steps

The waterline is one of the most visible parts of any pool - and one of the hardest to keep clean. Oils, sunscreen residue, and mineral deposits accumulate at the water's surface and form a persistent ring that manual scrubbing struggles to remove consistently. If you want your pool cleaner to scrub the waterline, be sure to choose a model that has this feature. Pool steps, benches, and ledges can also be addressed by models with flexible navigation and step-cleaning ability. Some robotic pool vacuums go over the steps but are too big and have no mechanism for actually cleaning the steps. If your pool includes built-in steps or a tanning ledge, look for a model that explicitly lists step coverage as a feature. Maytronics has a few models with mechanisms designed for cleaning steps.

Types of Robotic Pool Cleaners

Robotic pool cleaners come in several configurations. The right type depends on your pool's shape, size, surface material, and how much importance you place on cable-free operation.

Corded vs. Cordless Robotic Pool Cleaners

Many robotic pool cleaners are corded: a floating low-voltage cable connects the robot to a power supply plugged into a standard outlet. This design provides unlimited runtime - the robot can run multiple full cleaning cycles without any power constraints, making it reliable for large pools or extended, weekly cleaning schedules that provide full coverage. The power supply also allows the robot as much suction power as is needed without compromising.

A cordless robotic pool vacuum runs on a built-in lithium-ion battery rather than a power cable, which eliminates cable management. The robot moves freely through the pool without a cord in the water, and setup is as simple as placing the robot and pressing start. The trade-offs are runtime and suction power: most cordless models last between 1.5 and 4 hours on a single charge - enough for a standard-sized pool, but requiring planning for larger pools. After each cleaning session, the battery is recharged. Most mid-high-end models have a weekly scheduling ‘eco-mode’, but the 3 hours of battery life is split into short, usually floor-only cycles. Basically, battery-powered robots are more convenient, less hassle, but also less thorough, and battery life is a constraint. This means that large pool owners often need to run more than one cycle for their pools to be clean.

Robotic Pool Cleaners for Inground Pools

Robotic pool cleaners for inground pools are engineered for greater water depth, greater pool surfaces, and more complex shapes - including freeform, L-shaped, Roman-end, and kidney designs. They usually offer full wall-climbing capability, multiple cleaning modes, and pool size coverage ratings that typically range from 30 to 60 feet in length. Premium inground models include Wi-Fi connectivity, dual-motor drive systems, and ultra-fine-mesh filtration for capturing algae and fine silt.

Above ground pool robots are more compact and lighter, built for flat-bottom pools with standard rectangular or circular profiles. They generally clean the floor only - wall climbing is less common in this category - and are available at lower price points. When selecting any model, always verify its pool size coverage rating against your actual pool dimensions and whether you want to scrub the walls.

Where Dolphin wins:

• Always-on power: The Nautilus CC Plus runs as long as needed without recharging. For larger pools, heavy debris seasons, or owners who want to press one button and walk away, corded reliability removes a variable that cordless designs cannot.
• Filtration consistency: The 70-micron ultra-fine cassette delivers tested, consistent water clarity. The original Scuba S1 used a standard basket — the optional 3-micron insert was only added in the 2025 upgrade.
• Warranty depth: Three years of full coverage vs. a 2-year limited warranty that excludes the components most likely to need replacement: tracks, brushes, and filters.
• Scheduling: The My Dolphin Plus app enables true weekly scheduling. The original Scuba S1 had no app connectivity at all.

Where the Scuba S1 has advantages:

• No cord: Cordless cleaning is genuinely more convenient in pools with irregular shapes or obstacles where a cable can snag.
• Price: The Scuba S1 is frequently available under $700, making it one of the more accessible full-coverage cordless pool cleaners on the market.

Benefits of a Robotic Pool Cleaner

Here is why most pool owners choose Maytronics robotic cleaners over suction and pressure alternatives:

• Energy efficient: Robotic pool cleaners run on low-voltage electricity and don't require your pool pump to operate during the cleaning cycle. This reduces overall energy consumption compared to suction cleaners, which run the pump continuously while cleaning.
• Fully independent: Because the robot is self-contained, you can run a cleaning cycle at any time - including overnight - without affecting your pool's circulation system or increasing load on your pool's filter.
• Complete surface coverage: Floor, walls, and waterline cleaned in a single automated cycle. No manual vacuuming, no scrubbing walls. Pump-based cleaners do not scrub and clean things that grow, like algae and bacterial biofilm.
• Reduces chemical consumption and chlorine by-products: By removing debris from the pool ecosystem before it can decompose, depleting chlorine and increase chlorine by-products, robotic pool cleaners help maintain water chemistry better.
• Smart controls: Many models connect to a smartphone app, allowing you to set cleaning schedules, switch between cleaning modes, and check cycle status remotely.
• Simple maintenance: After each cleaning cycle, remove the robot, empty the filter basket, rinse with a garden hose, and store it. The entire process takes under five minutes.

What to Look for When Choosing a Robotic Pool Cleaner

Not all robotic pool cleaners are built the same. These are the specifications that matter most:

• Pool size coverage: Every model specifies a maximum pool length or volume it can handle in a standard cycle. Match this rating to your pool's actual dimensions before purchasing.
• Surface coverage: Confirm that the model cleans floor, walls, waterline, and steps - not just the floor. Floor-only models are less expensive but leave walls and the waterline requiring manual scrubbing.
• Corded or cordless: Corded models provide unlimited runtime; cordless models offer freedom from cable management but are not ideal for large pools or scheduled cleanings.
• Filtration type: Ultra-fine-mesh cartridge filters trap smaller particles including algae and fine silt - important for pools that struggle with green water or fine debris. Coarser basket filters handle larger debris more easily, get clogged less frequently, and are simpler to clean. Some filtration systems offer both – but make sure the debris passes the course basket before the ultra-fine filters. There are models that place the ultra-fine filter first, which is counter-productive.
• Smart features: Wi-Fi connectivity and app control allow remote scheduling and cycle selection. A built-in weekly timer lets the robot run on a set schedule without any manual input.
• Warranty and parts availability: A multi-year warranty signals manufacturer confidence in the product. Verify that replacement brushes, filter baskets, and drive tracks are readily available before committing to a model.

Robotic Pool Cleaner Maintenance

Robotic pool cleaners are low-maintenance by design, but consistent care after each use keeps cleaning performance strong and extends the life of the robot significantly.

• Always remove the robot when doing chemical shocks: High levels of pool chemicals wear out the plastic and rubber parts of robots. If your pool requires a chemical shock, be sure the robot is not in the water until the chemicals have had enough time to evaporate. We recommend running the robot before shocking so it dislodges the chemical-resistant biofilm.
• Clean the filter after every use: Remove the filter basket or cartridge, rinse it under a garden hose until water runs clear, and allow it to dry before reinstallation. A clogged filter reduces suction and cleaning effectiveness.
• Rinse the robot exterior: After removing it from the pool, rinse the the robot to remove chlorine and chemical residue.
• Inspect brushes and tracks: Check roller brushes and drive tracks for wear every few weeks during pool season. Worn brushes reduce scrubbing effectiveness on walls and the waterline. Most manufacturers sell replacement brush kits.
• Store out of direct sunlight: UV exposure degrades the robot's housing, cable, and gaskets over time. Keep the robot in a shaded, cool location between uses - ideally on the included caddy or in a storage bag.
• Off-season storage: Before winterizing, thoroughly clean and dry the filter, drain any water from the robot's interior and cover it.. If your robot is battery-powered, charge it to a bit more than half, and notice the maximum/minimum temperatures specified in the instructions.

Key Components of a Robotic Pool Cleaner 

• Electric motor: Powers both the drive system (wheels or tracks) and the internal pump that generates suction to collect debris.
• Scrubbing brushes and rollers: Rotating brushes dislodge algae, dirt, chlorine-resistant bacterial biofilm, and fine debris from pool floors, walls, and the waterline. Brush material varies by surface type - rubber brushes for concrete and plaster, softer foam brushes for vinyl, fiberglass and smooth surfaces.
• Internal filtration system: A built-in filter basket or cartridge filter traps everything from large leaves to fine silt and algae particles. Unlike suction cleaners, captured debris stays inside the robot rather than passing through to your pool's filter, thus reducing water waste from filter backwashes.
• Navigation sensors: Onboard sensors guide the robot along an efficient, systematic cleaning path - ensuring full coverage without redundant passes.
• Power supply: Corded models use a floating low-voltage cable connected to a power supply that plugs into a standard outlet. Cordless models run on a rechargeable lithium-ion battery pack.

Robotic Pool Cleaner vs. Suction and Pressure Cleaners 

There are three main types of automatic pool cleaners on the market. Understanding how each works — and what it cleans — helps clarify why robotic models have become the preferred choice for most pool owners.

Robotic pool cleaners are the only type that operate completely independently from your pool's plumbing. They also collect debris internally, which means your pool's sand or cartridge filter handles significantly less load - extending filter life and reducing backwash frequency.

How Dolphin by Maytronics Elevates Robotic Pool Cleaning

Maytronics invented the robotic pool cleaner in 1983, making Dolphin the original and most trusted brand in the category. What began as a single product has grown into a comprehensive range of residential and commercial robots - each built around the same founding principle: effortless, automated pool maintenance that you can count on.

Every Dolphin robotic pool cleaner is thoroughly tested and meets the needs of specific segments of customers – some handle stairs, some are battery operated, some clean large pools, while some just clean the floor of a small pool. We listen to our customers and design robots for every need. The residential lineup spans models designed for above ground pools, standard inground pools up to 33 feet, and large-format inground pools up to 60 feet. For pool owners who want cable-free operation, the Dolphin Liberty and EON series offer cordless robotic pool cleaning with full wall-climbing capability and no cable to manage.

Connected Dolphin models pair with Maytronics’ app, giving you remote scheduling, real-time cycle status, and cleaning mode control from your phone. Whether you're looking for a straightforward plug-and-clean unit or a Wi-Fi-enabled robot you can program for the week, the Dolphin lineup has a model built for your pool.

Explore the full Dolphin residential robot lineup

Find the right Dolphin model for your pool with the Maytronics robot selector