Dolphin Premier or Dolphin Sigma: which should I buy?

Choose the Dolphin Premier ($1,999 on sale at Poolbots, $2,499 list on November 5, 2026) if your pool collects heavy leaf or debris loads: it takes an interchangeable bottom-load filter bag as well as cartridges, and it has a full-filter indicator. Choose the Dolphin Sigma ($2,399 on sale, $2,999 list) if you want gyroscope-guided navigation, the MyDolphin Plus app and a top-load basket, and you're willing to pay about $400 more for them. Both clean floor, walls and waterline, are rated for 50 ft pools, list 4,500 gph and carry a 3-year warranty.

What's the price difference between the Dolphin Premier and the Dolphin Sigma?

The Sigma is now the more expensive of the two. On Maytronics' US store (November 5, 2026) the Premier lists at $2,499 and the Sigma at $2,999, a $500 gap; Maytronics sends buyers of both to its certified dealer Poolbots, where a Fall Sale had the Premier at $1,999 and the Sigma at $2,399, a $400 gap. When we first compared them in September 2026, the Sigma typically sold for about $1,499, below the Premier, so check both prices on the day you buy.

Does the Dolphin Sigma have a leaf bag like the Premier?

No. Maytronics describes the Premier's filtration as an interchangeable, bottom-load filter bag and cartridge system, with a fine filter kit in the box. The Sigma uses an extra-large, multi-layer filtration basket that loads from the top, with an ultra-fine filter kit in the box, and no bag option. The bag suits pools under trees; the Sigma's top-load basket is easier to empty.

Which has better navigation, the Premier or the Sigma?

The Sigma. It uses a 3-axis gyroscope with SmartNav path planning to cover a pool methodically, and Maytronics lists an Automation Mode for it. The Premier navigates with Maytronics' CleverClean scanning and no gyroscope, so on a large or irregularly shaped pool the Sigma is more likely to cover every section. It also finishes its default cycle in 2.5 hours against the Premier's 3.

Does the Dolphin Premier have Wi-Fi like the Sigma?

No. Maytronics' spec sheet lists no mobile app and no remote control for the Premier; it runs on a weekly timer. The Sigma runs on the MyDolphin Plus app with Wi-Fi, plus a weekly timer. If app scheduling matters to you, that's a point for the Sigma.

Which is better for a large pool, the Premier or the Sigma?

Both are rated for in-ground pools up to 50 feet and clean floor, walls and waterline, so the answer depends on what's beating your current cleaner. If it's debris volume (leaves, acorns, heavy dirt), the Premier's filter bag is the more practical fix and it costs less. If it's coverage (a robot that misses sections on a big or oddly shaped pool), the Sigma's gyroscope navigation is the better fix. Our best robotic pool cleaner for large pools guide ranks both against other brands.

What do owners rate the Dolphin Premier and Sigma?

On Maytronics' US store (November 5, 2026) the Premier averages 3.9 out of 5 from 649 reviews, with 75% saying they would recommend it, and the Sigma averages 3.6 out of 5 from 667 reviews, with 74% recommending it. The review counts are similar, so the Premier's slightly higher average comes from a comparable sample.

Dolphin Premier vs Dolphin Sigma (2026): Which Large-Pool Robot Wins?

Quick Answer: The Dolphin Premier and Dolphin Sigma are Maytronics’ two 50 ft-rated flagships, and the Sigma is now the pricier one: on November 5, 2026, Maytronics’ US store listed the Premier at $2,499 and the Sigma at $2,999, and its certified dealer Poolbots had them at $1,999 and $2,399 in a Fall Sale. That roughly $400-$500 extra buys the Sigma’s 3-axis gyroscope navigation, MyDolphin Plus app, top-load basket and a 2.5-hour cycle (against 3 hours). The Premier keeps a filter-bag option, a full-filter indicator and a lighter body (20.3 lb against 24.6 lb). Both list 4,500 gph, scrub floor, walls and waterline, and carry a 3-year warranty, so pick the Premier for leaf-heavy pools and the Sigma for big or oddly shaped pools where coverage is the problem.

Last updated: November 5, 2026. Prices, specs and owner ratings re-checked on Maytronics' US store and Poolbots. The Sigma is no longer cheaper than the Premier: this comparison said "about $1,499 typical" for the Sigma in September, and both list prices have since been raised to $2,499 (Premier) and $2,999 (Sigma).

Both robots are rated for in-ground pools up to 50 feet and turn up together in “best for a large pool” searches, which makes them easy to lump into a simple good/better/best ranking. They’re built around different strengths. Here’s how they compare, based on Maytronics’ own spec sheets, current dealer prices and our research-based reviews of each model.

Dolphin Premier vs Sigma at a glance

Spec (Maytronics US, Nov 5 2026)	Dolphin Premier	Dolphin Sigma
List price (Maytronics)	$2,499 (99996339-SPL)	$2,999 (99991036-SPLI)
Sale price (Poolbots, Fall Sale)	$1,999 ($500 off)	$2,399 ($600 off)
Max pool length	50 ft	50 ft
Coverage	Floor, walls and waterline	Floor, walls and waterline
Suction rate	4,500 gph	4,500 gph
Default cycle	3 hours	2.5 hours
Navigation	CleverClean scanning	3-axis gyroscope + SmartNav
Filtration	Interchangeable bottom-load bag and cartridge, fine filter kit included	Extra-large multi-layer top-load basket, ultra-fine filter kit included
Full-filter indicator	Yes	No
App / timer	Weekly timer, no app, no remote listed	MyDolphin Plus app (Wi-Fi) + weekly timer
Anti-tangle swivel	Yes	Yes
Robot weight	20.3 lb	24.6 lb
Warranty	3 years	3 years
Owner rating (Maytronics)	3.9/5 from 649 reviews, 75% recommend	3.6/5 from 667 reviews, 74% recommend

By the numbers

$400 to $500: how much more the Sigma costs than the Premier on November 5, 2026: $2,399 against $1,999 on sale at Poolbots, and $2,999 against $2,499 at Maytronics list. In September the Sigma typically sold for about $1,499, below the Premier, so this gap has flipped.
The same 4,500 gph: Maytronics lists the same suction rate for both. The Sigma’s extra motor and gyroscope buy smarter coverage and a 30-minute shorter default cycle, not a bigger suction number.
4.3 lb: the extra weight you lift out of the pool with the Sigma (24.63 against 20.29 lb, per Maytronics).
3.9 against 3.6 stars: Maytronics’ owner ratings, from 649 and 667 reviews. The cheaper Premier rates slightly higher.
3 years: both carry Maytronics’ longest residential warranty, so warranty length isn’t a deciding factor between these two.

Dolphin Premier: filtration flexibility for debris-heavy pools

Dolphin Premier

Filter-bag option, lower price · $1,999 sale (Poolbots) / $2,499 list (Maytronics)

9.5-inch suction path with two scrubbing brushes and a 4,500 gph suction rating.
Interchangeable bottom-load filter bag and cartridges, with a fine filter kit in the box and a full-filter indicator.
No app or remote listed; runs on a weekly timer. Anti-tangle swivel, 3-hour default cycle, 20.3 lb.
3-year warranty; 3.9/5 from 649 owner reviews on Maytronics' store.

Robotic Reviews scored the Premier 98/100, and The Pool Nerd names it their top overall pick, largely on the strength of its filtration flexibility. If your pool sits under trees or regularly collects heavy debris loads, the filter-bag option is a real practical advantage, and the full-filter indicator tells you when to empty it. It’s now also the cheaper of the two. Our full Dolphin Premier review covers the specs and where independent testers found weaknesses.

Dolphin Sigma

3-axis gyroscope + Wi-Fi app · $2,399 sale (Poolbots) / $2,999 list (Maytronics)

Three motors and a 4,500 gph suction rating, the same suction figure Maytronics lists for the Premier.
3-axis gyroscope + SmartNav for deliberate, full-coverage navigation on big or irregular pools; 2.5-hour default cycle.
Extra-large multi-layer top-load basket with an ultra-fine filter kit in the box. No bag option, no full-filter indicator.
MyDolphin Plus app over Wi-Fi plus a weekly timer, anti-tangle swivel, 24.6 lb, 3-year warranty.

The Sigma’s case is navigation and convenience, not extra raw power: it matches the Premier’s 4,500 gph despite the third motor. It earns its price with the 3-axis gyroscope, which covers a pool methodically instead of relying on standard scanning, a shorter cycle, app scheduling and a basket you empty from the top. Whether that’s worth $400 more depends on how badly your current cleaner misses spots. Our full Dolphin Sigma review has the spec sheet and independent-tester notes.

Which should you buy?

Choose the Premier if: your pool collects heavy leaf or debris loads, you want the filter-bag option and full-filter indicator, or you’d rather keep the $400-$500 difference.
Choose the Sigma if: you want gyroscope-guided coverage on a large or irregularly shaped pool, app scheduling and a top-load basket, and the higher price fits your budget.
Check the price on the day: Poolbots’ Fall Sale cut $500 from the Premier and $600 from the Sigma, and an extra $50 code applied to orders over $1,000 on November 5. Dealer sales come and go, and the Sigma’s price has moved more than the Premier’s this year.
Either way: both are corded robots rated for pools up to 50 feet that clean floor, walls and waterline. The real differences are filtration style, navigation and price.

If you’re weighing either Dolphin against a different brand, our best robotic pool cleaner for large pools guide ranks both against cordless and pressure-side alternatives, and our best Dolphin pool cleaner guide puts them next to the rest of Maytronics’ 2026 lineup.

The bottom line

The Premier and Sigma aren’t a simple upgrade/downgrade pair, but in late 2026 the price does follow the features: the Dolphin Sigma costs about $400-$500 more for gyroscope navigation, app control, a top-load basket and a shorter cycle. The Dolphin Premier is the better buy for leaf-heavy pools, with its filter-bag option and full-filter indicator, a lighter body and a slightly higher owner rating. Match the robot to what’s beating your current cleaner: debris volume points to the Premier, missed coverage points to the Sigma.

Sources (checked November 5, 2026): Maytronics US store product pages and tech specs for the Dolphin Premier (99996339-SPL) and Dolphin Sigma (99991036-SPLI), including list prices, owner ratings and "would recommend" shares; Poolbots product pages for both (MSRP, Fall Sale price, SAVE50 code); Robotic Reviews and The Pool Nerd for the Premier verdicts. We compare published specs and documentation and don't test products ourselves.