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Pure Watercraft 50 hp Electric Outboard

Discussion in 'Tenders & Dinghies' started by SeaLion, Aug 16, 2020.

  1. SeaLion

    SeaLion Senior Member

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  2. Pascal

    Pascal Senior Member

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    Maybe I missed it but no mention of how long the battery last...

    Way to expensive compared to a gas outboard but in a few years when prices come down it will Be great for tenders so we don’t have to carry extra fuel and worry about running out when some places in the Bahamas run out.
  3. v10builder1

    v10builder1 Senior Member

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    Equivalent rating = 25 to 50 HP? Which is it - quite a range. The outboard's motor is specified at 25 KW - this is roughly 33 HP equivalent. The info says the motor and prop are on the same shaft - which would improve efficiency a bit over the typical outboard 90 degree shaft direction change. Weight is stated at 105 pounds - a Johnson 35 HP outboard weighs 196 pounds. A battery pack is stated to weigh 118 pounds.

    A 25 KW motor uses 25 KWH in 1 hour. Each battery pack is 8.8 KW. Maximum life restricts discharge to 50% and recharge to 90%, as a practical matter, using discharge to 25% and recharge to 95% .... 8.36 - 2.2 = 6.16 KW usable or 24.64 KW for 4 packs = about 1 hour at full throttle (4 packs weigh 472 pounds), or much longer at lower power settings or periodic versus continuous use.

    The charger is rated 6.6 KW when 240 VAC is available. 50% to 100% recharge of 1 pack would be 4.4 KW - theoretically .66 hours/40 minutes - specifications say 90 minutes - this means they limit the charge rate to make batteries last longer (good), and 2 packs would not take twice as long.

    These motors are being used to coach crew/rowing. No doubt there are other practical uses. IMHO, Cat and Cummins have nothing to fear yet.

    Stay well all.
  4. olderboater

    olderboater Senior Member

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    They don't know the answers to those questions as they haven't yet built one. Hoping to get deposits so they can.
  5. Pascal

    Pascal Senior Member

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    The only use for marine electric propulsion, besides larger diesel-electric, is on sailboats which only need it for a short time to maneuver to and from a dock or mooring. That’s it.

    that S what we use in the little 26’ classic gaffer I built: inboard electric. No space for a diesel, didn’t want to deal with fuel and maintenance and didn’t want to ruin the looks with an outboard.
  6. NYCAP123

    NYCAP123 Senior Member

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  7. Pascal

    Pascal Senior Member

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    Double quote. And your point is ???????

    i dont think The second one is mine
  8. NYCAP123

    NYCAP123 Senior Member

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    Sorry about that. Had to go back to the link to check something while carrying something already written. Nothing meant by the double quote.
    Here's what should have been:

    "Maybe I missed it but no mention of how long the battery last..."
    "Way to expensive compared to a gas outboard but in a few years when prices come down it will Be great for tenders so we don’t have to carry extra fuel and worry about running out when some places in the Bahamas run out."
    -------------------------------------------------
    There've been a lot of attempts over the years, but this looks very interesting. There's a lot of boats out there running 50hp, and no noise or emissions are big pluses, but the death in going electric has always been cost. Electric power needs to be subsidized until it gets the costs under control. As for why they don't say how long the batteries last (besides being stumbling block #2) is that you can run up to 10 batteries plus I'd imagine it depends on whether you're running wot or trolling. Still though very interesting. Check back in 5 years.
  9. Pascal

    Pascal Senior Member

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    As I said earlier it would be great as a tender. No need to carry gas cans and recharge overnight on gen. But you need to have a decent range which the website conveniently omit to mention
  10. NYCAP123

    NYCAP123 Senior Member

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    Range with 1, 2 or 10 batteries trolling around a pond or running wot. Sure it's just too much info to put in a promo. I'd guess they could give a close range number if contacted cause you're correct. That's a big consideration.
    Given the price of these and the price of the Seven motors I have to wonder if all outboards will soon raise their prices.
  11. Pascal

    Pascal Senior Member

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    They could simply give range in hours at 75% cruise per battery pack... but I have a feeling nobody would even look beyond that number if it was published.

    On average we run our 15’ tender 30 minutes a days unless using it for tubing. This may be viable... but I suspect it is not.
  12. NYCAP123

    NYCAP123 Senior Member

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    Why 75% and not 25% for those who plan to just cruise a quiet pond since it would look so much better? Too many variables. A promo is designed to get you interested. Nothing more. If you're seriously considering it I'd guess you could get better answers by contacting them, but I assume it'd still be a wide margin since so much depends on how you use it. I'd also ask about the weight of the batteries and charger as that will also affect your performance, but I'd guess your "feeling" is correct. As I said, electric motors have a lot of stumbling blocks to overcome which is why I said it's interesting because it made it to market and will be even more interesting to see if they're still around and what improvements come about in the next 5 years. But there are those who just have to have the latest toy to show off and don't care about cost or anything else. I think that's their current market. Probably the same market as those who will spend $100,000 for a Seven outboard that has a very short track record.
  13. Capt J

    Capt J Senior Member

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    Aside from the issues everyone else mentioned. WHO would want that on the transom of anything, it's downright ugly.
  14. NYCAP123

    NYCAP123 Senior Member

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    'If you put 2 pieces of wood together in a way nobody else has some fool will buy it', Dave Carlin.
  15. Capt J

    Capt J Senior Member

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    That is the issue. I ran the Hinckley dasher.....over $500k for a 28' tender like center console boat. The range at slow speeds was around 80 miles +/-........ if you did 25 mph or so......well it dipped down to about 20-30 miles........one 50 amp cord charges it overnight, plugging in 2 50amp cords charges it in I think it was 6 hours........not exactly practical......
  16. Pascal

    Pascal Senior Member

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    It’s only 50hp so good for 13-14’ inflatables. If it could do two hours at fast cruise on a charge and could charge overnight, even using a 240 v charger, it would be a viable option. I hate having to keep a couple of cans of gas on deck. Then in the Exumas even if we start with full tanks and the two cans, sometimes it s not enough.
  17. Capt J

    Capt J Senior Member

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    I'm in the same boat. We had a Williams 395, but would stay in marina's a little more often than you, no more than 3 nights on the hook between marina's. I carried 2 sure cans with 5 gallons each and hated that. We never got close to running out, we got within 1/2 a tank on the tender, but it's a pita. If staniel didn't have gas, we would be close. I think you just really need a good center console with a big range for what you're doing and to ditch the inflatable. My owner takes baby steps, first started out with a 3 seat jet ski that lasted 2 trips, then a Williams 395 on the swim platform that lasted 2 trips and we sold it, now he's looking for a 21' center console (when I told him he needs a 26') which he hasn't bought yet and if he gets a 21', that too will last 2 trips until he buys the boat he needs.
  18. NYCAP123

    NYCAP123 Senior Member

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    50hp can go on 15' Whalers and even 20' fishing skiffs. So there's a big market. Good place to come in. Still lots of obstacles though from price to charging times to .........
  19. Capt J

    Capt J Senior Member

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    Read v10builders post, the HP is not the problem, the weight of the battery packs are a serious problem for those sized boats, except perhaps something like a Carolina skiff that has a huge weight carrying capacity for it's length.
  20. NYCAP123

    NYCAP123 Senior Member

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    Yep, hence the ........