1500 W 12V Real Sine Wave Inverters? - Page 2 - SailNet Community
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post #11 of 32 Old 04-17-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

Maybe.....
Battery is under the nav desk seat, could put the inverter on the wall outside...that would get in the leg way and/or door to the head. So best on the nav desk....could be the wall inside the head, also less than 6"........hmmmmm.......nah!

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post #12 of 32 Old 04-18-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

What about under the nav table?
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post #13 of 32 Old 04-18-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

Where did you get a pic of my nav table? or is that yours? if so, you CS looks like my jeanneau......

ANyway, the charger is under the table on the back left, the side you see next to the manual pump is my two small uniden portable radio's.......Could go below them or maybe below the Heart 25amp charger.......

In general, the pic shows about where the thing would go, ie about 10 or a bit less as the wire goes, 3' as the crow flies per say..........

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post #14 of 32 Old 04-18-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

Pic is from Yachtworld - the boat is somewhere in France.

With the battery under the seat and the inverter under the table you could run the wires along the hull outboard of the seat - should be a pretty short run.

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post #15 of 32 Old 04-18-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

As I said, probably less than 10', the charger is all of 6-8' IIRC. I can go under the lift off floor tween the nav desk and the seat. A number of wires are under their, easier than along the wall.

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Re: 1500 W 12V Real Sine Wave Inverters?

That works - I would use 2 awg wire anyway - bigger is better. That will give you less than 2% voltage drop and the inverter will be happier. Your battery isn't huge - you don't have many amps to lose.

And now back to your regularly scheduled programming.

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post #17 of 32 Old 04-18-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

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Originally Posted by hellosailor View Post
I'd have to go with the 2kW model, as putting 1200 on the 1kW model on a regular basis is at least on paper not a good idea.

And then again, Xantrex seems to think their Xantrex XPower 1500 will run all the same stuff--with great faith in their modified sine wave. Anyone seen a wave trace of that to see just how close it comes?
We've used Xantrex MSW inverters for years (two 10,000W DRs, stacked) for our house & cabinet shop. The waveform of most MSW inverters is pretty crude (roughly three steps per pi/2 radians), but very few items seem to care. We run all normal kitchen appliances, a deep well pump, fluorescent lighting, and a shop full of big 240VAC tools.

Things that theoretically don't like MSW power: compressors and pumps (which start under load); mid-range electronics panels (anything with a blue LCD readout) like modern washing machines; some digital clocks; raster televisions.

Computers scrub their power. LCD screens don't show horizontal lines. Motors may draw a little more current & run hotter, but otherwise are fine. We had one digital clock run fast (but two others are accurate), and our Kidde smoke alarms read the MSW as voltage spikes, tried to clamp it, and nearly burned the house down.

Otherwise, we've been very happy with our MSW inverters.

BTW, even True (or pure) Sine Wave inverters aren't. A static solid-state device cannot produce the smooth curves of a rotating armature. TSWs simply make more, smaller steps that closely simulate utility power. Typically around 24 or 48 steps per pi/2, rather than 3 for MSW. I'd advise talking to someone who has MSW on their boat, driving loads similar in size and type to what you plan, & see if MSW has worked for them. The cost savings can be hundreds, or even thousands for larger inverters. The only TSW inverters on the market when we built our system that would handle big tools driven for 12 hrs a day would have cost ~$4000 more (for two) than our Xantrex DRs. Which are simple, yes, but also v. robust.

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post #18 of 32 Old 04-19-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

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For me it would be christmas lights with the motor running, music if need be.......a power tool, but I have plenty of battery operated ones to not worry too much. LT can go on the 12V charger.....
Not to butt in here, but you really should take a look at LED Xmas lights. They are becoming more available each year.
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post #19 of 32 Old 04-19-2012 Thread Starter
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Re: 1500 W 12V Real Sine Wave Inverters?

"BTW, even True (or pure) Sine Wave inverters aren't. "
True, it is a matter of degrees. No pun intended. How many pulses they use, how they shape the pulses, in theory "pure" sine wave would be modified sine wave anyway, unless someone was using a real waveform generator and then pushing the power to follow it. At least in theory that's possible too.
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post #20 of 32 Old 04-19-2012
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Re: 1500 W 12V Real Sine Wave Inverters?

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Originally Posted by ccriders View Post
Not to butt in here, but you really should take a look at LED Xmas lights. They are becoming more available each year.
John
WHo said I do not have LED lights on the boat, over 3000 of them little buggers! Yes, even LED lights use power at some point of quantity!

I use 2 15amp circut breakers, can not use just one or I blow the one up!:lau gher

May have to put in a new house battery, as it was acting up last weekend. So may get an AGM in a size 31......should help a little over the size 24 flooded battery.......

now back to regularly scheduled programing!

marty

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