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Narrowboat Envy | Solar Electric Narrowboat Helius powers up the River Thames. 2 

Mothership Marine Ltd
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Helius is a very beautiful narrowboat. Her home berth will be on the River Thames. She have been designed for a couple who have owned many narrowboats. Helius is a culmination of a lot of experience on the water.
Helius has been built by Mothership Marine Ltd in their factory in Oundle in Northamptonshire. Mothership is a very environmentally conscious company. They only build solar electric boats. Most of the timber used in building the boats is reclaimed. Helius has a solid oak interior that’s been stained dark to enhance the aged feeling. The wood is also quite uneven and gives the impression that the boards have been walked on for hundreds of years.
That said, all the systems on board are state of the art. Business owner Tim Knox states “The technology needs to be so good you never have to think about it.”
Some of the features include:
- Drawbridge bed
- Double chaise longues
- Bespoke shower
- 2 pump out toilets with 400L HDPE tank
- Quooker tap
- Dishwasher
- Washer dryer
- Combi oven with microwave and air fryer
- DC fridge freezer
- 5 G wifi
- TV
- Alexa with Fire TV
- 8kw Quattro
- Isolation transformer
- MPPT solar charger
- 38.4 kW/h lithium battery bank
- 15kW PMAC direct drive water cooled motor
- 20 inch propeller
- bow thruster
- 1.8 kW of solar panels
Helius has been built to the highest standards on a superb Jonathan Wilson hull. She is a bespoke vessel and a joy to sail.

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9 июн 2024

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Комментарии : 33   
@es8117
@es8117 Месяц назад
Beautiful boat.
@mothership_marine
@mothership_marine Месяц назад
Thank you very much!
@user-bs5xz2gs6l
@user-bs5xz2gs6l Месяц назад
Top notch work, as always. Having been a systems designer on US Navy ships, I admire your selection and integration of appropriate cutting edge tech into a vessel, while paying attention to the art and beauty of the design. Congratulations on another success.
@mothership_marine
@mothership_marine Месяц назад
That’s my favourite comment ever. You really do get what I’m trying to do. Thanks so much. Tim
@keithmeadowcroft1331
@keithmeadowcroft1331 Месяц назад
What an excellent presentation
@mothership_marine
@mothership_marine Месяц назад
Thank you kindly Keith!
@SLOWLYdoesit1
@SLOWLYdoesit1 Месяц назад
Fantastic specifications and excellent detailing on this boat. I found your previous argument about the electric torque combined with a large prop being most efficient really interesting and is clearly being proven correct. I will be commissioning a boat in the next couple of years and will want air conditioning on board- I saw the 2 vents here and wondered if that was part of a MHRV system? There looks to be space enough to fit a MHRVAC system (which I have put in my last 2 homes). I wonder if it could be connected to a Kensa Shoebox water source heat pump?
@mothership_marine
@mothership_marine Месяц назад
Hi there - thanks for your kind comments. The 2 high vents are the high level vents we need to have from a regulatory point of view. Regards your boat. Anything is possible. Cheers Tim
@johnmurray9833
@johnmurray9833 Месяц назад
Love it
@mothership_marine
@mothership_marine Месяц назад
Thanks John
@flibbertigibbet6324
@flibbertigibbet6324 Месяц назад
It is good to see more narrowboat builders exploring the option of a full-width bed right up forward. Is the split bed lift-up mechanism required to meet emergency egress regulations in the RCD (if any are specified)? I can see a tend in narrowboat design in future years with the welldeck function switching to a mini GenSet engine room, thus the argument for a full sized bed right forward becomes more persuasive.
@mothership_marine
@mothership_marine Месяц назад
No emergency requirement, just easy of access forward. You might be right about the well deck but equally I'd like to see gernrators gone, but I can't see it for a while - Tim
@kencast4478
@kencast4478 Месяц назад
My my, this is a beautiful boat but boy the owner can talk your legs off!!
@mothership_marine
@mothership_marine Месяц назад
It's not the owner, its the boat builder and he's proud! Thanks for the kind comments
@flibbertigibbet6324
@flibbertigibbet6324 Месяц назад
I also have some specific technical questions. 1 - Given that hybrid narrowboats often have a primary voltage circuit of 48v, when total amp hour lithium capacity is quoted is this at 48 volts or is capacity normalized to 12v to produce a comparable cross industry number? 2 - Does Helius have two black water holding tanks to avoid a long pipe to the aft tank? 3 - Do you foresee received wisdom on electric motor KW power sizing changing as the narrowboat industry gains more field experience with serial hybrids? Your previous video showed your Mothership engine producing nearly a 1/4 ton pulling force at 10KW. Anything more seems excessive unless a hydrofoil equipped planning narrowboat will be your Crick 2025 exhibit.
@mothership_marine
@mothership_marine Месяц назад
Answer below - 1) at 48V 2) 1 tank at the back but we hard pipe in ABS plastic and put the pipe in before we foam 3) I agree with you about the motor - you don't need the power for running but it's essential for manovering and feeling good about you boat. I'm not intending to do Crick - it cost me £15,000 all in all last time. I will concerntate on this sort of thing - do you have a project in mind?
@flibbertigibbet6324
@flibbertigibbet6324 Месяц назад
@@mothership_marine Thank you for responding. I have a project in mind but at present not the bank balance to begin that project. Maybe in two years... Until then I will firm up my plan for that future project. At this point I believe Mothership has the definitive implementation of a narrowboat hybrid powertrain. I will be following your newly announced vlog series about the conversion of an older narrowboat to hybrid power.
@paulbauswellsr3296
@paulbauswellsr3296 23 дня назад
Excellent tour, lovely boat. How much travel can you get on a full charge or half charge? And if the weather turns off gray for a few days with rain, and you are not near anyplace to get shore power, what then? I love the concept, but what are the contendgucies?
@mothership_marine
@mothership_marine 22 дня назад
Hi Paul - It depends on how fast you go and how much sun is around. Normal boat speed takes 1kW and the sun can produce that. Helius has 38kWh in her battery. I have a feeling you didn't pick that there was a large marine generator on board. However on our boats generators tend to be the most expense and least used item on board. Cheers Tim
@paulbauswellsr3296
@paulbauswellsr3296 22 дня назад
@@mothership_marine no I am sorry I didn't see the generator. I am 66yrs old and I see the world trying to get away from fossil fuel. Any time I see something new, like your boat, I find myself submerged in questions. Solar is a great alternative and I was just looking for a better understanding. Thank you for your response.
@mothership_marine
@mothership_marine 21 день назад
@@paulbauswellsr3296 You're welcome
@namelm
@namelm Месяц назад
What kWh are the solar panels? What size batteries? You kindly showed me this one at Electrika. Very nice.
@mothership_marine
@mothership_marine Месяц назад
1.8 kW batteries, 38.4kWh batteries - cheers Tim
@waynegardella2589
@waynegardella2589 Месяц назад
At normal speed how many hours will the batteries last? And using the GenSet how many hours to recharge them?
@mothership_marine
@mothership_marine Месяц назад
Hi Wayne. A loaded question. Much depends on the sun. Normal speed uses about 1kw an hour. You can easily get that from the sun on a sunny day. The batteries have 32kwh of usable power so that’s 32 hrs. The generator will charge a 6kw so that’s 4 hours too recharge. With the generator on you also get hot water. Cheers Tim
@trofamify
@trofamify 9 дней назад
Great boat but nothing about price
@mothership_marine
@mothership_marine 7 дней назад
Sorry but we can’t put prices on RU-vid. Please call if you are interested. Tim
@Remote-Key-Repair
@Remote-Key-Repair Месяц назад
I'd like to buy one of these however I'd need a LOT of power would it be possible to be solar panels on the sides too? Due to it being on the sides I think protective slides covering them would be a good idea... Would you entertain the idea of sorting that out if I was to buy one?
@mothership_marine
@mothership_marine Месяц назад
I’ve thought about putting solar on the sides. In fact in polar latitudes they point the panels at the ice because it reflects light so well. Same for water. The issue is making it look nice. All of our solar panels are custom made. We would design something for the sides. It will be expensive.
@Remote-Key-Repair
@Remote-Key-Repair Месяц назад
@@mothership_marine I have had a thought about it and I don't think I'd need as much power as I thought... My soldering equipment auto turns off and would maybe use 1200w at max power however am usually below 50% of that... With all the equipment computers, screens and printers and so on I'd want to have 2500w - 3000w so I know I can safely run my gear and use electric ovens etc? Do you refurbish narrowboats or is it new only?
@mothership_marine
@mothership_marine Месяц назад
That level of power is fine - but you'll struggle in the winter. You'll need another electric supply, genny or shore charge. Yes we do do conversion. Please call if you'd like a chat. It's not cheep though. 07496 574434 Tim
@Remote-Key-Repair
@Remote-Key-Repair Месяц назад
@@mothership_marine 57ft by 10ft wide... roof and sides full of solar panels what would be the out put on a avg winters day? I think a genny would be a good idea for backup if it's horrific weather I agree... What would a full refit cost for 57ft by 10ft with quality insides? I've got some saving up to do hopefully buy before winter don't want to take up too much time on calls deal with that myself customers calling for info and not buying lol
@mothership_marine
@mothership_marine Месяц назад
I really need do more detail - would you like to call me. 07496 574434
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