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E-WERFPortfolioPettersson | Legend

Pettersson | Legend

Boat name

Legend

Make and type

Pettersson

Dimensions LxWxH

650 x 180 x 120

Year of construction

1927

Type of project

Full Electric

Motorisation

Waterworld 7.5kW

Battery pack

2 x 100Ah E-WERF LiFePo4 10.2kWh

Charger

E-WERF 25A

Current measurement

Waterworld Display with Smartshunt

3 kW

Cruising speed @6kn

1 kW

Economic cruising speed @ 4kn

7.5 kW

Max speed @ 8kn

Electrification Pettersson Legend | A piece by the owner:

For 2 years it has been lying inside, our Legend. A wooden Pettersson, built in 1927. The original 2 cylinder Wickström petrol engine proved unreliable, so we spent some time wondering: "what now?".

Last late summer ('22), we decided to replace the petrol engine for an electric motor. Also with a view to the rules that will apply in Amsterdam sometime in the near future (no more fossil). Left and right, we informed ourselves about the possibilities and impossibilities of electrification. Of course, cost considerations were also important. I had already calculated that we would end up somewhere around € 11,000 to € 13,000. Taking into account the size of the boat and your expectations in terms of sailing behaviour.

Providers

All sorts of things came along. From potentially complete packages to do it - possibly - yourself, to fully integrated solutions. We considered: Hollex (package); Bellmarine - relatively heavy/industrial; KrautlerWad - Austrian provider; Torqueedo - saildrive / BB engines; AquaMot - European manufacturer; GreenMarine - inboard specialist; WaterWorld - sloop specialist. All suppliers have been on the market for a relatively short time for pleasure craft. Often a decade or so, but mostly have longer experience in "electric-on-the-water". I also got a lot of information from E-Varen Magazine (AK Maritime Service) - available on-line.

Where to install?

Besides cost, where we could have the electrification done was also not unimportant; how to get the boat there? What kind of 'hassle' is it to take it to the north or east of the Netherlands for a while? Not entirely coincidentally, a specialist turned out to be nearby: e-Werf, opposite DeSchinkel at the location of (former) Jachtwerf DeHoop.

Engine / battery capacity

But what will you build in? That depends partly on: how long do you want to sail? How fast do you want to sail? How much installation space do you have (both for the engine and batteries)? "The Silent Boat" has online a roadmap To get an idea about that. In our situation, I initially dithered between 4/4.5 Kwh and  7.5/8.5 Kwh. For the slim Petersson, the smaller size could be sufficient on its own, but would leave you with very little "just-in-case". So we opted for the slightly heavier variant. As for the batteries, there was really only one choice - lithium. The reason is simple. With conventional batteries, we would need to have about 400 kilos of battery on board to sail for a small day. With lithium, 2 batteries of 5 to 6 Kwh weighing about 60 kilos together give a similar capacity. The only pity is that lithium batteries cost about €2,500 each. ... . . . . and these are not even the most expensive.

In the past second half of April, our Pettersson now has a WaterWorld 7.5 Kwh electric motor installed in combination with a custom-built e-Werf lithium battery pack of 10 Kwh total. This allows us to cruise at cruising speed (6 km/h) for about 8 to 10 hours.

Experiences

On Monday 8 May, we sailed for the first time and it is a pleasure to go down the Nieuwe Meer without a murmur; you can even hear the birds in the forest on board.

You can read on the display how much power you are using and how long you can sail with the available battery capacity. We found that with "normal" sailing you use about 600 to 1000 watts, in other words you can sail for about 10 hours. However, if you sail at top speed - and then even with a narrow Petersson you pull a hefty stern wave - you use much, much more and you will run out of battery capacity in an hour. . . .

We are looking forward to going away for longer with the boat too. Friesland? South Holland? The Linge and perhaps beyond?

Legend
Agreed on an optimal electric solution for my "antique" Petersson (from 1927). 7.5 Kwh Waterworld with lithium battery pack (11 Kwh) enough for a full sailing day. Terrific, committed, enthusiastic for electrifying my boat. Highly recommended. Would knock on their door again in a heartbeat.
Hank Smits | Amsterdam

Interested in electric boating?

No boat is the same but despite this, our wealth of experience allows us to make a good estimate of the expected costs. We prefer to speak to you in person and get to know your wishes. On this basis, we can make a tailor-made offer, after which you will be completely relieved by us when you hand over your keys.

Use our configurator for an indication or just take contact with us. You are also always welcome to drop by our yard and be shown around.

Get in touch with us!