Robotic pool cleaner comparison

Dolphin EON 100 vs Dolphin S100

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

Dolphin EON 100 and Dolphin S100 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

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EON

Dolphin EON 100

Inground and above-ground pools up to 50 ft with steps, benches or tanning ledges that need whole-pool cordless cleaning, with a two-year warranty.

Listed price See product

View better alternatives

S-Line

Dolphin S100

Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.

Listed price $849

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A better alternative

What we recommend instead

Pool Express pick

Dolphin Quantum

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

$1,649

Buy Dolphin Quantum

Buying guidance

Dolphin EON 100 or Dolphin S100: our take

Dolphin EON 100 and Dolphin S100 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.

Pool fit and cleaning reach

Both robots are intended for inground and above-ground pools. Dolphin EON 100 is rated for pools up to 50 ft; Dolphin S100 is rated up to 33 ft. Dolphin EON 100 cleans floor, walls, and waterline; Dolphin S100 cleans floor and walls. Dolphin EON 100 lists SmartMap navigation. Dolphin S100 lists 1 active brush.

Filtration and debris

Dolphin EON 100 includes Basket; Dolphin S100 includes Basket and UltraFilter. Dolphin S100 has the clearer documented edge for fine silt, pollen and sand.

Controls and day-to-day ownership

Dolphin EON 100 provides a weekly timer and smartphone control; Dolphin S100 provides a weekly timer and power-supply controls. Dolphin EON 100 uses cordless battery power, while Dolphin S100 uses a 50 ft corded cable. Dolphin EON 100 is listed at 22.1 lb versus 14 lb for Dolphin S100; that 8.100000000000001 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Each lists a 2-year manufacturer warranty. Dolphin EON 100 and Dolphin S100 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

Feature check: what each robot actually has

A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.

Feature	Dolphin EON 100	Dolphin S100
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	Yes	Yes
Scrubs the waterline	YesEdge	No
Fine-debris filter included	No	YesEdge
Large-debris filter	Yes	Yes
Automatic scheduling	Yes	Yes
Smartphone app	YesEdge	No
Anti-tangle swivel	Not listed	Not listed
3-year warranty	No	No
No recharging between cycles	No	YesEdge
Built-in UV-C water treatment	No	No

Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.

Where Dolphin EON 100 stands out

Dolphin EON 100 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.

Cleans the floor, walls and waterline instead of stopping below the tile line
Adds smartphone control
Is rated for pools up to 50 ft

Where Dolphin S100 stands out

Dolphin S100 is the better fit for inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.

Includes filtration for sand, pollen and other fine debris
Runs from continuous plug-in power without a recharge between cycles
Weighs 14 lb versus 22.1 lb