Dolphin S300 robotic pool cleanerCorded waterline~$1,499

Dolphin

Dolphin S300

Sold mostly through pool dealers, the S300 is also on Maytronics' own store, and it is one of the few Dolphins whose spec block lists a caddy in the box. Two filter kits, app scheduling, waterline scrubbing and a two-year warranty round it out.

Approx. price

~$1,499

snapshot, not a live price

Pool fit

No cable length published

Filtration

No micron figure published

Retrieval

You fish out 18.5 lb

the maker lists no self-parking, so it comes out from wherever the cycle ended, full of water

Default cycle

120 min cycle

Cost per swim season

$750

price ÷ warranty years; a floor, not a lifespan

Best for: Buyers who want the caddy and both filter kits in one box

Specifications

Approx. price
~$1,499
Type
Corded waterline
Power
Corded
Cleans
Floor, walls, waterline
Maker's pool claim
50 ft
Default cycle
120 min
Filter
Fine filter kit, plus an ultra-fine kit in the box
Weight
18.5 lb
Retrieval
You fish out 18.5 lb
App control
Yes
Caddy or dock
Included
Pool types
in-ground, above-ground
Warranty
2 years
Cost per swim season
$750 floor

A specification not listed here is one Dolphin does not publish for this model. It is left blank rather than estimated or borrowed from a sibling.

Features

  • Caddy included
  • Fine and ultra-fine filter kits
  • App control and weekly timer
  • Waterline scrubbing
  • Anti-tangle swivel

What it does well

  • Caddy included, which Maytronics lists for few other models
  • A two-year term, where every Nautilus model up to the $1,599 Titan stops at one
  • Rated for in-ground and above-ground pools to 50 ft
  • Weekly app timer and swivel cable, so it can run unattended without the cable knotting
  • Fine and ultra-fine kits both ship with it, where the Explorer E50 lists a single multi-layer filter

What it gives up

  • Only one fixed cycle length is listed
  • The Explorer E50 adds a filter-full indicator and three cycle lengths for less money
  • No micron figure, so its fine kit can't be set against the CC Plus's 70 µm

The two lists above come from the maker’s own specifications and this site’s arithmetic on them, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.

What owners say

The S300 is a Dolphin mostly sold through pool builders and dealers, and owners who received one with a new pool or bought it as their first robot are generally content with the cleaning.

What surprises owners is how it navigates. It follows a cleaning pattern rather than building a map, and a first deep clean that misses sections sent one owner looking for answers. The faults owners describe cluster at start-up: brief movement and a stop, or an out-of-water error.

The best case for it is an owner who gets one with a new pool or through a dealer who will service it, and who expects pattern-based coverage rather than mapping.

What owners like

  • New owners report being pretty happy in the first weeks, and owners who compared it with its siblings describe the S200/S300 platform as popular and generally dependable.
  • Owners who sold a house with one had used it for years and wanted the same remote control on the replacement.
  • It handles larger debris well by one pool builder's customer's account, who was given one with the pool.

Common complaints

  • It does not map the pool: a first-time owner was surprised it missed sections on its first deep clean, and learned most robots of its kind navigate by pattern rather than by map.
  • Start-up faults come up — a unit that moved for three seconds and stopped with the board light turning red, and a lookalike model that reported an out-of-water condition on most starts.
  • One owner looking to add a second robot felt it did less well on walls and sun shelves than the Premier.

Questions owners ask about the Dolphin S300

Does the Dolphin S300 map my pool?

No. Owners who expected mapping were surprised when it missed sections; robots in this class follow a pattern and cover the pool over the whole cycle.

My S300 moves for a few seconds and stops — why?

Owners report exactly this, with the power supply light changing colour. It is a start-up fault that owners take to the dealer or Maytronics.

Is the S300 for above-ground or in-ground pools?

Both, per Maytronics; owners in one thread corrected a suggestion that it was above-ground only.

Others in the same part of the catalog

Dolphin Explorer E50 robotic pool cleaner
Dolphin~$1,329

Dolphin Explorer E50

Corded waterline · 120 min cycle

Pool fit
No cable length published
Filtration
No micron figure published
Retrieval
You fish out 19.2 lb
  • 2-year warranty
  • Filter-full alert
  • 3 cycle lengths

Cleans: Floor, walls, waterline

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