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Showing results 1 to 25 of 298
Search took 0.01 seconds. Search: Posts Made By: mcarthur
Forum: Engines and Propulsion Systems 23-04-2024, 22:31
Replies: 1
Views: 146
Posted By mcarthur
Re: Perkins M90 Anodes?

Our M135 don't have them (at least according to the manual I have!), so guessing the M90 don't either.
Forum: Lithium Power Systems 02-04-2024, 20:59
Replies: 70
Views: 4,757
Posted By mcarthur
Re: Fuses and circuit breakers for LiFePO4

What Cerbo setting do you use? I have the BMS connected and it's the controller, but I like your idea for remote use.


Even more interested :flowers: - how have you got the bilge pump indicator...
Forum: Multihull Sailboats 26-03-2024, 17:48
Replies: 48
Views: 9,057
Posted By mcarthur
Re: How much electric power is needed to power a 40 - 45' cat at 5 knots?

Hmm, with no shading (motor boat, not masted) 65sqm of area should give (1000W/sqm @ 20% efficiency) about 13kW at about a daily 4x multiplier = 52kW/day.
5kn for a relatively efficiently hulled...
Forum: Powered Boats 11-03-2024, 22:27
Replies: 20
Views: 2,927
Posted By mcarthur
Re: Looking for brand recommendations for long range cruising motor yachts

I'll change your ending: there is nothing romantic thrashing through waves and swell at 20kn using 150lph and throwing $100 into fuel tank every 17minutes and either being on the fly where it's wet...
Forum: Construction, Maintenance & Refit 15-02-2024, 17:36
Replies: 18
Views: 1,864
Posted By mcarthur
Re: Wireless Switching

So if the Shelley's give up the ghost, and they are inline, then manual breaker isn't going to work since the power is still trying (and failing presumably) to go through the (burnt out, failed,...)...
Forum: Lithium Power Systems 07-02-2024, 15:36
Replies: 60
Views: 6,101
Posted By mcarthur
Re: How are people charging Li/LA hybrid setups?

Since our house is 48V, there's few 48-12 DCDC that are chargers (as distinct to converters). So we'll be using a 100/20 or 100/30 MPPT from Victron to charge the 12v from the 48v.
Forum: Electrical: Batteries, Generators & Solar 23-01-2024, 16:04
Replies: 31
Views: 2,538
Posted By mcarthur
Re: Only one design of battery onboard and it’s Lifepo4

Thank you. Our lifepo4 will be 48v, so direct connect to engine, bypassing BMS, isn't possible since our starter is 12v (or can be 24v). But it is interesting to hear you're bypassing the BMS to deal...
Forum: Electrical: Batteries, Generators & Solar 22-01-2024, 18:02
Replies: 31
Views: 2,538
Posted By mcarthur
Re: Only one design of battery onboard and it’s Lifepo4

I'm interested in your engine start - we have twin 135hp 6c NA Perkins. The manual specs 2 x parallel 12v 600cca (or near) for starting. Actually it's not 600CCA: "each battery must be at least...
Forum: Electrical: Batteries, Generators & Solar 18-01-2024, 15:07
Replies: 107
Views: 44,831
Posted By mcarthur
Re: DC Generator - The Smart Way to Go

Yep, A$30k for a 12kW locally made one (good quality, milspec). Which is around US$20k. Not installed, not shipped. :frown:
Forum: Lithium Power Systems 24-11-2023, 16:50
Replies: 91
Views: 12,447
Posted By mcarthur
Re: Starting a big diesel with lifepo4

How did you go? I'm in almost the same situation, same engine and similar EVE...
Forum: Anchoring & Mooring 20-09-2023, 01:06
Replies: 88
Views: 9,710
Posted By mcarthur
Re: Anchor chain marking and weaving line vs. paint

The only thing on a boat that goes up in resale value - unused items :wink:
Forum: Electrical: Batteries, Generators & Solar 17-09-2023, 18:06
Replies: 4
Views: 707
Posted By mcarthur
Re: Bilge pumps with digital switching

Oh, good idea for the separate modules if we go digital for the auto! Thank you.
Forum: Electrical: Batteries, Generators & Solar 14-09-2023, 21:42
Replies: 4
Views: 707
Posted By mcarthur
Re: Bilge pumps with digital switching

Thanks Matt, good to know. Excellent idea for the triplex.

I also realised there's another option - run a small wire to the water detector and back to the digital switch unit, but in mPower this...
Forum: Electrical: Batteries, Generators & Solar 14-09-2023, 01:51
Replies: 4
Views: 707
Posted By mcarthur
Bilge pumps with digital switching

I asked (https://www.trawlerforum.com/forums/s4/bilge-pumps-digital-switching-69586.html) over on trawlerforums, but realised that people here may have advice as well...

I'm rewiring for some...
Forum: Navigation 20-08-2023, 20:39
Replies: 53
Views: 6,242
Posted By mcarthur
Re: Binoculars

Maven C1. There are many excellent (better) smaller brands now, not just the usual old ones. Glass machining and coatings have come quite a way in 10-20 years, so I'd recommend looking wider at least...
Forum: Lithium Power Systems 15-08-2023, 21:06
Replies: 74
Views: 5,556
Posted By mcarthur
Re: Who should be in control?

I'd be happy with the BMS is the central "controller" - but only if it communicates to others (Cerbo, chargers, mppt etc.).
Also, the BMS OVP for cell and pack have to work well: there's some nice...
Forum: General Sailing Forum 27-07-2023, 19:45
Replies: 31
Views: 4,952
Posted By mcarthur
Re: 45k USD for vessel transportation from Caribbean to EU

Wow! We took our powercat 15 x 5m for less than $20k about 4 years ago. Peters and May.
Forum: Europe & Mediterranean 18-07-2023, 21:07
Replies: 34
Views: 4,416
Posted By mcarthur
Re: Joys of Cruising Baltic Germany

...and if you are lucky, you may just see Caruthers and Davies flying along searching for fishing grounds :smile:



#Ref: Riddle of the Sands
Forum: Marine Electronics 28-06-2023, 19:40
Replies: 110
Views: 9,530
Posted By mcarthur
Re: Why do we still use cigarette-lighter adapters?

Hmm, so 24V with the BlueSea may be ok, and that would give extra oomph using the USB power protocols. I'd have to run a little 12-24V boost converter behind though - have you checked any of them? ...
Forum: Electrical: Batteries, Generators & Solar 05-06-2023, 18:51
Replies: 8
Views: 1,091
Posted By mcarthur
Re: Monitor Shore Power

If you networked a Pi or Nuc to a Cerbo GX attached to an (inverter-)charger, you should be able to program a notification of your choice (SMS, email, flare :smile: ).
Forum: Electric Propulsion (EP) 25-05-2023, 20:48
Replies: 15
Views: 1,921
Posted By mcarthur
Re: Electric Foreigner - a catamaranEP converson project

Glad a decision is made. What genset are you thinking of?
If DC (which I would strongly suggest), there's only a few options out there unfortunately.
Forum: Powered Boats 25-05-2023, 20:33
Replies: 20
Views: 2,541
Posted By mcarthur
Re: Newbie question: what's the average cost per NM for a power cat 47' ?

The previous Aquilla's that I looked up aren't designed particularly for efficiency compared to some other more one-off designs. For example most from Malcolm Tennant's design hand would potentially...
Forum: Electric Propulsion (EP) 16-05-2023, 18:12
Replies: 15
Views: 1,921
Posted By mcarthur
Re: Electric Foreigner - a catamaranEP converson project

I'd love to add a pair of pods on our powercat, with the option of large sized, slow moving props for upto-hull-speed. Say 600mm++ diameter for us. Have you seen anything like that?
Forum: Powered Boats 16-05-2023, 17:27
Replies: 20
Views: 2,541
Posted By mcarthur
Re: Newbie question: what's the average cost per NM for a power cat 47' ?

There was one I read about (sorry, can't find it) that had a single wide foil attached at each hull under the mid-aft bridgedeck. The article wasn't owner written, so I didn't take much notice of the...
Forum: Powered Boats 16-05-2023, 17:21
Replies: 20
Views: 2,541
Posted By mcarthur
Re: Newbie question: what's the average cost per NM for a power cat 47' ?

I did some analysis on fuel efficiency for largish cruising powercats that may help - bluenomads.blog (https://bluenomads.blog/tag/fuel-economy/). I must bring it uptodate (which I've said many times...
Showing results 1 to 25 of 298
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