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Old 12-15-2013, 12:37 PM   #21
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Oliver, I think it largely depends on where you are cruising. In Florida, I completely understand the need/desire for AC 24x7. But if you cruise to other destinations you will likely feel differently about it. On our trip from New England to Florida this fall we only had 2-3 days where we ran the AC (and generator) all night, and most of them were in Florida. There are a few other reasons the keep you inverter system in place 1) Resale value. Lots of people cruise in areas where the generator is not needed 24x7 and want the quiet time. We certainly seek it out whenever possible. 2) Backup power. If your generator fails, you can still keep most things running off the inverter, and if you are underway, your main probably produces enough power to do so indefinitely. You won't have AC or an electric oven or a washer/drier, but you can keep going. If you are far away from home, this level of redundancy is important.
Yep, we going leave the inverter as is. Florida is harsh, we WANT our AC. Well mostly be cruising the Bahamas. Also the sound shield plus Nordhavn's sound absorbing material, makes for a slight hum, that almost puts you to sleep.
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Old 12-15-2013, 12:48 PM   #22
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Your not crazy but you apparently do run her like a mega yacht. AC 24/7? I can't imagine. I do prefer the fresh air and sea breeze myself.
You don't have to be a mega yacht to run your ac 24/7, here in Florida almost every boat runs their ac if they can. Obviously no one knows that so it's out their now, shocker or not it's true. Even some bigger center consoles have gents just to run ac at the helm.
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Old 12-15-2013, 12:50 PM   #23
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While I have no plans to remove the inverter from my boat, one of the items I had considered adding was a second much smaller generator in a double sound sheild. If the air conditioning isn't running, my boat could likely be very happy on 3.5 to 5 KW. I see the second inverter as redundancy, better utilized (% of capacity) on smaller loads, more fuel efficient on smaller loads, lower operating and maintenance costs because of size, and more reasonable replacement cost. My goal was to be able to utilize the inverter while motoring unless air conditioning was needed, then run the small generator till bed time when on the hook. Ted
Thanks for for your input.
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Old 12-15-2013, 12:51 PM   #24
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Here in Florida, it's more usual than not for a boat to have much higher generator hours than the engines.
You nailed it right on the head!
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Old 12-15-2013, 01:14 PM   #25
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I never ran mine in the keys this year accept at the dock, I'm sure if it had been summer I would have been much more tempted. Better yet save the gen time and head to Maine with us for the summer :-)
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Old 12-15-2013, 02:19 PM   #26
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I never ran mine in the keys this year accept at the dock, I'm sure if it had been summer I would have been much more tempted. Better yet save the gen time and head to Maine with us for the summer :-)
When were you in the keys! and where did you stay? We were planning on doing a trip to the Fort. Thanks for the offer, is their much fog up there in the summer?
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Old 12-15-2013, 02:47 PM   #27
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OLIVER

NO, You are not crazy. You're just normal!

I'd rather spend a few bucks more with fuel than being unable to sleep. If you come to Northeast Brazil you'll know why I do agree with Oliver.
Tropical heat mixed up with humidity, is hard to deal with for long periods of time.
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Old 12-15-2013, 03:23 PM   #28
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...

Still I don't like the racket from diesel generators OR wind generators. ...
The Vagari, thank God, has a completely silent wind generator.

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Old 12-15-2013, 03:34 PM   #29
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Among other things the inverter allows us to rise in the still of the morning at anchor and enjoy a cup or two of fine coffee via our Keurig; no genset required.
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Old 12-15-2013, 04:10 PM   #30
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What size genny and/or inverter are you folks running?

We have not had the opportunity to run our genny much yet but the few times I have fired it up it is clear we will never be able to run it very long and certainly never in a quiet anchorage with nearby boats. Despite the fact the engine room is fully insulated with modern sound barrier & the genny is in a sound enclosure, the noise and vibration is simply too irritating for an extended period. I think most of our problem is the genny is a 30kw 4cyl 200+cid diesel guzzling monster....... what could the manufacturer have been thinking???? In my opinion it is absurdly over sized, in fact when testing it's limits I had the wife go around and turn on every AC device she could find, including oven, washer/dryer, air units, chargers, lights, etc. and I could not get it loaded up in the slightest. There was no rpm pull down as it started digging in, nothing, you couldn't tell we turned anything on. I would like to pull it out and put in a 10kw but I just don't know if it's worth the cost. Also not sure how I would get it out, it's at least as big as one of my 3208 Cats.

We do have an inverter so I am thinking my best solution will be to beef up the battery bank and just use the genny in the morning for an hour to charge the batteries.
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Old 12-15-2013, 06:31 PM   #31
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OLIVER NO, You are not crazy. You're just normal! I'd rather spend a few bucks more with fuel than being unable to sleep. If you come to Northeast Brazil you'll know why I do agree with Oliver. Tropical heat mixed up with humidity, is hard to deal with for long periods of time.
OHHHH, FINALLY. Someone that gets it. The humidity is worse their, but It's still bad here, sweating on bead? I think not.
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Old 12-15-2013, 06:33 PM   #32
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What size genny and/or inverter are you folks running? We have not had the opportunity to run our genny much yet but the few times I have fired it up it is clear we will never be able to run it very long and certainly never in a quiet anchorage with nearby boats. Despite the fact the engine room is fully insulated with modern sound barrier & the genny is in a sound enclosure, the noise and vibration is simply too irritating for an extended period. I think most of our problem is the genny is a 30kw 4cyl 200+cid diesel guzzling monster....... what could the manufacturer have been thinking???? In my opinion it is absurdly over sized, in fact when testing it's limits I had the wife go around and turn on every AC device she could find, including oven, washer/dryer, air units, chargers, lights, etc. and I could not get it loaded up in the slightest. There was no rpm pull down as it started digging in, nothing, you couldn't tell we turned anything on. I would like to pull it out and put in a 10kw but I just don't know if it's worth the cost. Also not sure how I would get it out, it's at least as big as one of my 3208 Cats. We do have an inverter so I am thinking my best solution will be to beef up the battery bank and just use the genny in the morning for an hour to charge the batteries.
2.5 Kw inverter, and a Northern Lights 12Kw, that's just barely hums, and it's the kinda hum that puts you to sleep. Also with a switch of a valve we could direct genny exhaust underwater.
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Old 12-15-2013, 09:14 PM   #33
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Oliver, do you find the 12kw meets your needs? Mine is also a NL but mine doesn't hum you to sleep, it wakes the dead. I like that exhaust switch idea, it would be a godsend to keep the fumes down when swinging at anchor not to mention quieter.
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Old 12-15-2013, 09:20 PM   #34
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Oliver, do you find the 12kw meets your needs? Mine is also a NL but mine doesn't hum you to sleep, it wakes the dead. I like that exhaust switch idea, it would be a godsend to keep the fumes down when swinging at anchor not to mention quieter.
it works great! Its runs all the AC's and have not tried it with appliances yet, but will get back to you on that. One thing to keep in mind is we run a 240v system, so we draw less amps at a higher voltage verse lower voltage higher amps. We have a total of 5 AC's totaling 64,000 BTU's. which keeps the boat nice and cool even on a hot summer humid sticky day.
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Old 12-15-2013, 09:24 PM   #35
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When were you in the keys! and where did you stay? We were planning on doing a trip to the Fort. Thanks for the offer, is their much fog up there in the summer?
Fog is a minor issue, at displacement speed it's really not an issue at all. We were at Coral Lagoon Marina in Marathon.
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