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A side-by-side comparison of the Dolphin Sigma and Dolphin Explorer E20 — price, filtration, cleaning coverage, brushes and warranty — to help you pick the right Dolphin robotic pool cleaner.
| Feature | Sigma | Explorer E20 |
|---|---|---|
| Price | $2999$2349 | $1299$669 |
| Lineup | ProLine™ | Explorer™ |
| Best for | The most advanced clean | Budget wall climbing |
| Pool size | Up to 50 ft | Up to 33 ft |
| Cleaning coverage | Floor + Walls + Waterline | Floor + Walls |
| Scrubbing brushes | 2 (Active brushes) | 2 |
| Filtration | NanoFilters™ | Top-load cartridge |
| Control | myDolphin™ Plus app + Gyro | CleverClean™ |
| Warranty | 3 years | 2 years |
The Dolphin Sigma is part of the ProLine™ lineup — The most advanced Dolphin ever, with a gyroscope and app control. It cleans pools up to 50 ft with floor + walls + waterline coverage and NanoFilters™ filtration, backed by a 3 years warranty.
The Dolphin Explorer E20 is part of the Explorer™ lineup — Wall climbing on a budget in the Explorer™ line. It handles pools up to 33 ft with floor + walls coverage and Top-load cartridge filtration, backed by a 2 years warranty.
The Dolphin Sigma is our pick. As part of the ProLine™ — one of our two top-recommended lineups — it steps ahead of the Dolphin Explorer E20 with floor + walls + waterline coverage, NanoFilters™ filtration and a 3 years warranty.
The Dolphin Explorer E20 is the cheaper option at $669, but the step up to the Dolphin Sigma buys a meaningfully better clean and longer coverage that's well worth it.
Every Dolphin Max-Series™ and ProLine™ robotic pool cleaner ships free and is backed by a full manufacturer warranty — explore our top-recommended robots and find the right fit for your pool.
Shop Max-Series™ Shop ProLine™ Shop all DolphinThe Max-Series™ and ProLine™ deliver the best cleaning Dolphin makes. See how our top picks stack up head-to-head:
