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Thruster specs
Sleipner ERV210 eVision: specs, price and the boats it fits
The ERV210 is the strongest 250 mm eVision retractable: 463 lb of push for boats of about 56 to 79 ft, at 24 or 48 V, with its brushless motor standing upright.
Imtra lists the 24 V unit at $28,545, before a separate tariff line. At 24 V the manual gives 600 A and an ANL 500 fuse, so the 48 V build, at 320 A, is much lighter to wire. See the specs.
The manual gives 2 to 3 minutes at full thrust at 20 C, where the product page says continuous. It weighs about 91 kg. Warranty: two years.
Fitting it yourself? The installer section has every spec, and the Sleipner (Side-Power) review sets this model against the rest of the Sleipner range.
Where this summary comes from (5 sources, read 15 October 2026)
Key facts
- DIY level 2 of 5 Wiring prep only
- Thrust 463 lb 210 kgf, Sleipner's rating
- Boat length 56 to 79 ft Sleipner's own range
- Price $28,545 equipment only, imtra.com, 15 October 2026
- Fitted by a yard $37,733 to $50,274 Our estimate at 65 ft, unit and job
- Voltage 24 V or 48 V As sold
- Mounts Retractable Drops down, bow or stern
- To fit it Haul-out The boat comes out of the water
- Run limit Not published Ask the maker before long use
Every figure here is the maker’s or a dealer’s, except the fitted cost, which is our estimate. The full spec sheet is further down.
How much of the install is yours
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You fit it, electrician connects. You mount and wire it; a marine electrician makes the final connections.
- Level 3: Split with the yard. The yard does the below-waterline part; you do the wiring.
- Level 2: Wiring prep only. The yard fits the unit and does the hull work; you do the wiring prep.
- Level 1: Yard job. A qualified professional does all of it.
You Yard Electrician. The bar is labor hours; a haul-out is a note.
How we rate DIYYou: 4 to 16 h Yard: 40 to 88 h Electrician: 2 to 4 h Plus a haul-out.
- Cut the hull and fit the housing and mechanism Yard 40 to 88 h Nobody publishes an hours figure. Fisheries Supply says installation is significantly more expensive than a tunnel, and that is too loose to turn into a number. So this is the tunnel’s own banded figure plus a quarter, which keeps it above a tunnel as the distributors describe it.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 h Our estimate. No maker times this step, and a first-time owner is slower than a yard, so the range is wide.
- Final connections at the battery and the motor, load test Electrician 2 to 4 h Our estimate. Nobody publishes a time for the final connections and test on their own.
Your part needs:Heavy battery cableCrimping big lugs
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Is it right for your boat?
Our figure is the longest boat one unit can steer in a 15 knot wind. It is a range because each kind of boat catches the wind differently. Here a houseboat gets full thrust to 54 ft, and a catamaran to 80 ft. The maker gives one range for every boat.
The table below tries the Sleipner ERV210 eVision on each kind of boat, at every length that kind of boat is built in. The wind is 15 knots and the rules are the finder’s own. A length counts as a fit when the unit gives the thrust that boat needs at the bow and the maker lists it for that length.
A boat up to 10 percent past the maker’s range still counts here, as it does in the finder. So the table runs down to 51 ft and up to 80 ft, just past Sleipner’s own range (56 to 79 ft).
| Boat | Full thrust at 15 knots | Still a fit, in lighter wind |
|---|---|---|
| Pontoon & tritoon | Not listed. A retractable drops down inside the hull, and a pontoon has no hull depth to drop into. | |
| Sailboat | 60 to 72 ft | 73 to 80 ftfull thrust to about 14 knots at 80 ft |
| Houseboat | 51 to 54 ft | 55 to 80 ftfull thrust to about 10 knots at 80 ft |
| Catamaran | 68 to 80 ft | None |
| Trawler | 59 to 72 ft | 73 to 80 ftfull thrust to about 14 knots at 80 ft |
| Motor yacht | 59 to 72 ft | 73 to 80 ftfull thrust to about 14 knots at 80 ft |
| Bass & flats | Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward. | |
| Wake & ski boats | Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward. | |
| Express cruiser | No length. More thrust than the boat needs. | |
| Center console | No length. More thrust than the boat needs. | |
Reading the two length columns. The first column is where one unit gives all the thrust the boat needs in 15 knots. The second is where the finder still lists it: the unit falls short of what the boat needs by no more than 10 percent, and gives the whole figure only in the lighter wind named. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
It is sized for five kinds of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the fitting. The compare page sets this unit beside others.
What it costs fitted
These totals are our estimate of a yard job: the unit’s price, plus a yard’s hours at $160 to $180 an hour, plus the batteries, cable and charger, plus the other parts the box does not hold. A Lifting the boat out of the water on a travel lift or a trailer so work can be done below the waterline. It is billed separately from the job itself. adds $1,010 to $3,860 at these lengths, with 5 to 7 days out of the water, worked from eight yards’ own rate cards. The hours are our own estimate. Your own yard will have its own opinion. The cost page builds the same figures line by line.
| Boat length | The unit | Yard labor | Haul-out | Batteries, cable, charger | Other parts | Total |
|---|---|---|---|---|---|---|
| 51 ft | $28,545 | $6,400 to $15,84040 to 88 hours | $1,010 to $2,460 | $1,212 to $1,934 | $336 to $815 | $37,503 to $49,594 |
| 65 ft | $28,545 | $6,400 to $15,84040 to 88 hours | $1,240 to $3,140 | $1,212 to $1,934 | $336 to $815 | $37,733 to $50,274 |
| 80 ft | $28,545 | $6,400 to $15,84040 to 88 hours | $1,490 to $3,860 | $1,212 to $1,934 | $336 to $815 | $37,983 to $50,994 |
How the batteries, cable and charger add up. We price a battery bank close to the thruster, as the makers recommend, with 10 to 20 ft of cable out and back: red for the positive, black for the negative, cut to length. The low end is the cheapest battery that meets the figure and the shorter run; the high end is a sealed (AGM) battery and the longer run. The charger is a NOCO GEN5X2 two-bank shore charger.
Batteries and lugs are priced at Fisheries Supply and the cable and charger at Defender, read 12 October 2026.
- At 24 V: two 12 V batteries in series, at least 1,140 CCA each (Sleipner’s minimum), $886 to $1,104 for both; Sleipner’s cable table gives 3/0 AWG, priced on 4/0 AWG, the nearest size cut to length: $180 to $314 for the red and black cable and the lugs; a GEN5X2 charger, $146.
- At 48 V: four 12 V batteries in series, at least 608 CCA each (Sleipner’s minimum), $1,440 for all four; Sleipner’s cable table gives 2/0 AWG: $114 to $201 for the red and black cable and the lugs; two GEN5X2 chargers, $293.
The sizing and the costs on this page are estimates, for guidance only and without warranty. They are no quote, and nobody has inspected your boat. Check them against the maker’s manual and your yard before you rely on them. Terms of use.
What else you buy
What follows comes from Sleipner’s SE80 to SE150 installation guide, document 2687 rev 30, 2025, read 30 September 2026. That manual is written for the tunnel units. A retractable unit brings its own housing, so there is no tunnel to buy.
- In the box
- The gasket, bolts and anode come with the unit. The SEP guides call the power controller "the included PPC unit".
- Bought separately
- The ANL fuse and a main switch ("must include"), the control panel with its own guide, the panel cable and the battery cable.
- Charging
- The word "charging" is not in any of the Sleipner guides we read. The battery is sized by cold cranking amps, and a battery near the thruster is suggested. How it gets charged is left to you and your installer.
The manual’s words, page 19: “For installations on large vessels with bow and stern thrusters or catamarans a dedicated battery for each thruster should be considered.”
The “other parts” line in the estimate above is the priced parts below, $336 to $815 at Fisheries Supply’s prices on 30 September 2026. The batteries, cable and charger have a line of their own.
| Part | What it is | What to ask for | Dealer price |
|---|---|---|---|
| Control panel | The buttons or joystick at the helm. One helm, one panel: a second steering station needs a panel of its own. | SM8960G single joystick, SM8950G touch panel | $219–$374Side-Power touch panel and single joystick, VETUS push-button panel, Lewmar single joystick, at Fisheries Supply. |
| Control cable, panel to motor | The thin cable from the helm to the motor. Sold by length. | Side-Power 4-wire control cable, by length | $29–$173Side-Power control cables, VETUS panel cables, Lewmar Gen 2 connecting cables, at Fisheries Supply. |
| Main fuse | A slow-blow fuse of the ANL type at the battery, in the size the maker prints for the model. | Side-Power ANL fuse, the rating in the yard table below | $18–$57Side-Power ANL fuses, Blue Sea ANL fuses, at Fisheries Supply, read 16 October 2026. |
| Fuse holder | The block the ANL fuse bolts into, with a cover. | SMANLHOLD (SMANLHOLD-C with a cover) | $27–$93Egis and Blue Sea ANL fuse blocks, Side-Power ANL fuse holders, at Fisheries Supply, read 16 October 2026. |
| Main battery switch | The switch that cuts the thruster off from its battery when you leave the boat. | Side-Power manual main switch, 350 or 600 A, or the automatic AMS | $35–$107Egis m-Series 300 A, Blue Sea e-Series 350 A and HD-Series 600 A on/off switches, at Fisheries Supply, read 16 October 2026. |
| Control-circuit fuse and switch | A small fuse, and often a switch, on the thin wire that powers the panel or control box. | Sleipner names none | $8–$12Blue Sea in-line ATO fuse holders, at Fisheries Supply, read 16 October 2026. |
| Battery cable and lugs | The two heavy cables from the battery to the motor, sized to the length of the run. The wiring calculator sizes them. | Sleipner names none | In the electrical line |
| Battery bank | A cranking-type bank near the motor, sized by the maker's cold cranking amps. The battery calculator checks it. | Sleipner names none | In the electrical line |
| Charger or charge feed | How the thruster bank gets charged: a shore charger of its own, a DC-to-DC charger or charging relay from the boat's system, or a charger built into the unit. | Sleipner names none | $146–$305NOCO GEN5X2 shore charger, Victron Orion-Tr Smart DC-DC charger, Blue Sea ML-ACR charging relay, at Fisheries Supply. |
| Glass, resin, filler and sealant | What bonds the tube or housing into the hull and seals the gear leg. | Sleipner names none | Not priced |
The cost page has the whole list with what every maker says about each part.
For the yard and the installer
The full spec sheet, grouped the way a yard reads it. Every figure is the maker’s or a dealer’s, with its source.
| Thrust and motor | |
|---|---|
| Thrust | 463 lb (210 kgf) As printed: 210 kg |
| Motor | 10.4 kW |
| Voltage | 24 V or 48 V |
| Fitting | |
| Type | Retractable, drops down |
| End of the boat | Bow or stern |
| Tunnel diameter | 250 mm |
| What it does to the hull | Large hull opening below the waterline |
| Haul-out to fit it | Yes |
| Maker’s boat length | 56 to 79 ft |
| Price and ordering | |
| Price | $28,545 equipment only, a dealer's price, imtra.com, 15 October 2026 |
| Part number | ERV210/250TC-24V24 V, 24 V DC (nominal 21 V DC) ERV210/250TC-48V48 V, 48 V DC (nominal 42 V DC) |
| Documents | |
| Manual | Installation manualon the maker's product page |
| Warranty | Sleipner gives 2 years for leisure use and 1 for commercial use. It transfers to the next owner, and it starts no later than 18 months after the boat's first launch. Sleipner's warranty statement, effective 1 April 2022 |
| The site’s review | Sleipner (Side-Power) review |
Draw, cable, fuse and battery, at each voltage
These are the maker’s own figures, at each voltage it is sold at. The cable is the size for the shortest run in the maker’s table. A longer run may need heavier cable, and the wiring calculator works that out for your own boat.
| Voltage | Draw | Maker’s cable | Fuse | Battery | Run limit |
|---|---|---|---|---|---|
| 24 V | 600 Anominal draw | 3/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableinstallation guide | ANL 500installation guide | 600 CCA DIN minimumSleipner installation guide, ERL and ERV 130 to 210 eVision, document 7241 rev 22 (2025) | Not published |
| 48 V | 320 Anominal draw | 2/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableinstallation guide | ANL 300installation guide | 320 CCA DIN minimumSleipner installation guide, ERL and ERV 130 to 210 eVision, document 7241 rev 22 (2025) | Not published |
- At 24 V: size the cable for your run, or check the battery you have.
- At 48 V: size the cable for your run, or check the battery you have.
What holds up and what to weigh
Each point names the fact it rests on.
What holds up
- Sleipner sells it for either end, so it can go at the bow or the stern.The maker's listing
- It is sold at 24 V and at 48 V.The maker's and dealers' listings
What to weigh
- The boat comes out of the water to fit it: it needs a large hull opening below the waterline.The mounting: a bore through the hull, or a housing recessed into it
What the manual and listings say
This is the note we keep on the Sleipner ERV210 eVision, written from the maker’s manual, its product pages and the dealer’s listing.
In the box: A brushless eVision motor on S-Link control. The panel, fuse and main switch are bought.
24 V
This retractable lives in a housing let into the hull through a large opening, and drops when used. It is a bigger yard job than a tunnel. It also has a mechanism to keep in order. The brushless eVision 210 kg retractable, vertical motor.
Videos
Two of Sleipner’s own videos, from its YouTube channel: X-Yachts on the ERV100 retractable in a 47 ft sailboat, and how the SRV and SRL retractables go in. They are the maker’s pitch. Watch them for what the unit looks like and how it goes in, and take any claim back to the figures above.
Other sizes and close alternatives
Sleipner also sells this thrust built another way. Each has its own page:
- At 24 V: Sleipner SRL170.
- At 24 V: Sleipner SRV170.
These are Sleipner’s next sizes in the same line, by thrust.
- One size down: Sleipner ERV170 eVision, 375 lb, $26,455.
- One size up: Sleipner ERV250 eVision, 551 lb.
These are other makers’ units of the same style, for the same end, within a quarter of its published thrust. Each is that maker’s nearest match.
- Quick BTR 250, three sizes, 265 to 529 lb, $23,840 to $26,476.
- Lewmar 250VRTT Vertical Retractable, 353 lb, $29,417.
Every model with a page here is listed, maker by maker, on the thruster index.