Bus Conversions dot Com Bulletin Board
October 21, 2014, 02:22:54 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: If your computer is lost, damaged, or stolen, your Online mags will be safe.
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: 1 2 [All]   Go Down
  Print  
Author Topic: Alternator, Batteries, Inverter Question  (Read 4713 times)
Highway Yacht
*****Jimmy*****
Hero Member
*****
Offline Offline

Posts: 504


Locust, North Carolina


WWW

Ignore
« on: April 26, 2010, 01:43:50 PM »

Ok....here are my plans as of now. My coach will be built mainly to use with shore power. I plan on installing (2) 15000btu rooftop a/c units and want to be able to use these units as my OTR air since the stock OTR unit is history. I want to install and power an extra alternator off the original pto pully where the stock OTR compressor was once located and have all that current going to a small as possible house battery bank and then to an invertor so I can power the (2) rooftop units and the fridge while traveling down the highway.
So now I need a little help with figuring out and sizing what I actually need to be able to do this. Starting with the 12v alternator, what kind of amp output will I need? How big of battery bank will I need? How many watts does my 12v Inverter need to be? Not sure of what the current draw on (2) 15000btu a/c units would be and I haven't bought the fridge yet so I don't have that current draw. Maybe someone knows what the current draw would be on a small apartment style fridge. I know there are a lot of variables here like if I was stuck in traffic at idle for a long time, startup of the units, etc. I'm just looking for a system that will keep the coach cool while going to and from shore power. Thanks...
Logged

1979 MC-9  8V71-Turbo / HT740             * www.MciBusTalk.com *
Locust, North Carolina                           A Site Dedicated To MCI's
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #1 on: April 26, 2010, 02:07:57 PM »

Sorry to be the bearer of bad news, but you can not do this with a single inverter on 12 volts.  Better if you had a 24-volt coach to begin with (you don't mention what coach you have), but, if not, you could still go with 24 volts for the house bank if you are planning to add an extra alternator anyway -- in which case, I would go right to the belt-drive version of the DN50 oil cooled brushless generator.

Here's the math:

A typical 15,000 BTU/hr roof air requires 13-16 amps while running, and 20-35 amps to start.  The spec likely calls for a 20-amp, HACR circuit breaker.

With both units running, that will draw 30 amps, give or take, which is 3,600 watts before factoring in inverter and other losses.  These can add up to 20%, so you need at minimum 4kW of inverters and probably more like 4.5kW, and that's before the fridge.

In order to start the units (one at a time), you'll need another 1,200-1,500 watts of "surge" capability.

4 and even 5kW units are available in 24 volts.  The largest 12 volt models are 3kW, and 2.5kW is more common.  You could get by with a pair of 2.5kW units if they have a "stacking" capability.  This would give you 5kW continuous and probably 10kW "surge."

As for the fridge, they are all over the map.  Can't give you any figures without a make and model.  Lots depends on frost-free vs. manual defrost (hard to find these days, except in the smallest "dorm room" type units).  However, I have never seen a 120-volt fridge that used less than about 200 watts, and anything taller than counter height is going to be more than that, possibly a lot more.  If you are serious about running a household fridge alongside two AC units from inverters, then you will need to shop specifically for a low-current manual-defrost model (or plan on disabling the automatic defrost when on inverter).

You alternator will need to be sized for the total continuous load (the batteries will take care of the starting surge).  That's at least 4,500 watts and probably more like 5kW, which would be 416 amps at 12 volts (no such animal -- you'd need at least two alternators), or 208 amps at 24 volts.  If you only ever do this while the engine is running, the size of the battery bank is almost irrelevant, and pretty much anything will work.

Lastly, you will need "true sine wave" inverters to run induction motors, and that's what you'll find in ACs and fridges.  Figure close to $0.30 per watt when all is said and done.

HTH,

-Sean
http://OurOdyssey.BlogSpot.com
« Last Edit: April 26, 2010, 02:14:45 PM by Sean » Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
Zeroclearance
Hero Member
*****
Offline Offline

Posts: 523





Ignore
« Reply #2 on: April 26, 2010, 02:25:15 PM »

OT,  Sean did you get your new batteries?
Logged
JohnEd
Hero Member
*****
Offline Offline

Posts: 4571




Ignore
« Reply #3 on: April 26, 2010, 02:43:52 PM »

jlink,

I think Sean has xeroxed copies of his posted answer.  Yours is a popular dream that can't be realized.  Others have installed a 120 VAC Mini-Split and put the evap over the drivers area.  The home units are much much more efficient and accurately sized/labeled.  Thanks to those dirty rotten scalleywag green conservatives interfering in the ethical practice of corp Meurica.  They haven't been able to force their underhanded ways on the RV industry as yet so we have to take their (mfr) unbiased word for everything That guy was really pleased with his heat pump split.  Blow it directly on ya and have a good fan directed at the driver.

Consider rethinking your decision to NOT us a engine driven compressor.  OEM OTR is far to large to fix or operate.  Read thru the other posts of late about OTR arrangements/designs.

John 
Logged

"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.”
—Pla
Len Silva
Hero Member
*****
Offline Offline

Posts: 4086


Angle Parked in a Parallel Universe


WWW

Ignore
« Reply #4 on: April 26, 2010, 03:02:33 PM »

After you do all the calculations based on Sean's advice, a decent diesel generator in the 8-10 KW range will probably cost less to purchase, about the same to operate and can be used when parked.

If you have a 24 volt coach, trying to use an inverter to run ONE air conditioner for the driver's area may make sense (though I don't think so), trying to cool the entire coach does not.

Even if you are extremely well insulated, two roof units will not be adequate on a hot day going down the road.

Retaining the OTR air conditioning or a generator and three roof units is probably the most practical and least expensive method. If you are planning any off the pole camping, you will need the generator anyway, might as well use it.
Logged


Hand Made Gifts

Ignorance is only bliss to the ignorant.
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #5 on: April 26, 2010, 03:11:52 PM »

FWIW, we do run two air conditioners while driving just from the alternator and inverter.  But we have a 24-volt coach that came with a 270-amp 50DN alternator, capable of producing over 6.5kW of power.  All we needed to add was the SW4024 inverter, which we wanted anyway for other reasons.

If we had to buy this amount of alternator capacity, the economics would not have made any sense, and we'd have considered using a generator while driving.

BTW, on a coach that spends more time parked than rolling, I personally believe that OTR air, whether that's whole-coach or just a driver unit, does not make sense.  It's a whole other system that needs to be maintained, takes up space, and requires that much more refrigerant, all for something that can't be used while parked.  Conversely, all the systems to run electric A/C while driving are normally already on board and being maintained anyway.

JMO.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
Len Silva
Hero Member
*****
Offline Offline

Posts: 4086


Angle Parked in a Parallel Universe


WWW

Ignore
« Reply #6 on: April 26, 2010, 03:24:59 PM »

FWIW, if you have a 24 volt coach and your name is Sean, it may be a good idea!  For someone with his knowledge and understanding of what is involved, it can work to your advantage. Under the same conditions, I might try it myself.  On the other hand, for the average busnut, who just wants to start the coach and put the A/C switch in the "ON" position, and drive down the road, I think you are much better off with a generator system.
Logged


Hand Made Gifts

Ignorance is only bliss to the ignorant.
James77MCI8
Sr. Member
****
Offline Offline

Posts: 338





Ignore
« Reply #7 on: April 26, 2010, 04:45:25 PM »

Having maintained my OTR A/c for the last seen years , I personally am going to the inverter option on my bus. I have spent more money on maintaining the OTR A/C than I have on any other mechanical systems associated with the coach. Since I do not boondock I don't see the need for a generator. My coach is 24V. I am with Sean on this one.
Logged

77 MCI 8
8V-71 4 spd
happycamperbrat
Hero Member
*****
Offline Offline

Posts: 1813





Ignore
« Reply #8 on: April 27, 2010, 01:50:33 AM »

Oh I am sooooo interested in this! I have an RTS which has the 12v and the 24v. I have the big mutha factory AC which works great BUT when parked it really sucks to be without AC. I live in HOT dry desert near Death Valley. I really believe in solar power, but the technology isnt quite there yet for me to use it on my bus...... close, but no cigar. I hate generators! I really dont want a genny. So my choice is to wait it out until the solar technology catches up with what I want to do and instead spend my cash on batteries and inverters. I was studying a guy's website about his bus and his name was Dave (if requested I will find the link and post it) He claims to have used 10 batteries, a 4200ish Trace Pure Sine Inverter in the Arizona desert for about 2 1/2 hours and then stopped the test to find out what his results were. He says he could have gone a lot longer. He was running a refer, 2 Carrier Roof ACs at 15,000btu, computer, tv, etc. If this is true, this would solve my problem of getting from one hook up to another.
Logged

The Little GTO is a 102" wide and 40' long 1983 GMC RTS II and my name is Teresa in case I forgot to sign my post
NewbeeMC9
NewbeeMC9
Hero Member
*****
Offline Offline

Posts: 1167


1981 MC9 8V71, HT 740




Ignore
« Reply #9 on: April 27, 2010, 03:59:18 AM »



Google DC mini split heat pump,    Also search the board here.


There was one with the rotary compressor and DC motor that claimed a high seer rating.


you'll spend more on the unit but you won't need as much inverter.
Logged

It's all fun and games til someone gets hurt. Wink
Highway Yacht
*****Jimmy*****
Hero Member
*****
Offline Offline

Posts: 504


Locust, North Carolina


WWW

Ignore
« Reply #10 on: April 27, 2010, 04:37:00 AM »

FWIW, we do run two air conditioners while driving just from the alternator and inverter.  But we have a 24-volt coach that came with a 270-amp 50DN alternator, capable of producing over 6.5kW of power.  All we needed to add was the SW4024 inverter, which we wanted anyway for other reasons.

If we had to buy this amount of alternator capacity, the economics would not have made any sense, and we'd have considered using a generator while driving.

BTW, on a coach that spends more time parked than rolling, I personally believe that OTR air, whether that's whole-coach or just a driver unit, does not make sense.  It's a whole other system that needs to be maintained, takes up space, and requires that much more refrigerant, all for something that can't be used while parked.  Conversely, all the systems to run electric A/C while driving are normally already on board and being maintained anyway.

JMO.

-Sean
http://OurOdyssey.BlogSpot.com



I do have a 24v DN50 gear driven alternator on the coach already...but I was under the impression from some past posts that it isn't a good idea to power the a/c's from the coach's engine alternator because it MIGHT use all the current coming from the alternator to power the inverter and a/c and cause dim headlights and possibly not enough cranking amps to start the 6V92. If that isn't true then that would be my best route..right? Do you even use a house battery bank or did you just go from the alternator straight to the inverter without house batteries?
Logged

1979 MC-9  8V71-Turbo / HT740             * www.MciBusTalk.com *
Locust, North Carolina                           A Site Dedicated To MCI's
TomC
Hero Member
*****
Offline Offline

Posts: 6852





Ignore
« Reply #11 on: April 27, 2010, 09:14:41 AM »

By the time you get either one large inverter, or two small inverters, one large or two alternators, extra batteries, etc, you're getting quite close to the cost of a Diesel generator.  I only use my inverter for small items (like microwave, toaster oven, water heater, bath heater, various plugs, TV's) and just run the Diesel generator going down the road.  You can get a decent 8kw Diesel generator for around $5,000-of which is not that far off the cost of setting up for an inverter system.  Then you'll have a generator, and will be much simpler in the end.  Good Luck, TomC
Logged

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #12 on: April 27, 2010, 09:56:18 AM »

I do have a 24v DN50 gear driven alternator on the coach already...but I was under the impression from some past posts that it isn't a good idea to power the a/c's from the coach's engine alternator because it MIGHT use all the current coming from the alternator to power the inverter and a/c and cause dim headlights and possibly not enough cranking amps to start the 6V92. If that isn't true then that would be my best route..right? Do you even use a house battery bank or did you just go from the alternator straight to the inverter without house batteries?


Well, if you already have a 24v DN50, and you've removed the OTR air (which was what needed all that juice in the first place), then, yes, the most straightforward solution is to get a 4kW, 24v sine wave inverter.  You should be able to pick one up for $1,200-$1,500.

I do recommend you use separate batteries.  The inverter will need to be powered up all the time, not just when it is running the loads while driving.  You don't want any possibility that the inverter will accidentally deplete the start batteries.  Use a solenoid powered from the alternator's Relay terminal (or old blower circuit) to bridge the banks together only when the alternator is charging.  You can also use a relay from this same circuit to force the A/Cs off-line in the event that the engine is not running.

You will not use up all the power from the DN50.  Your 4kW inverter under normal circumstances will draw at most 185 amps.  Your DN50 produces 270 amps, leaving a margin of 85 amps, or over 2kW, to charge both battery banks.  Most heavy-duty vehicles have entire alternators smaller than this.

If you are going to do this, I would recommend further that you use 24 vdc for your entire house system.  I've written about this extensively in the archives, and even did an article on it in the magazine last month or so.

My guess is that, at some point, you will still want a generator.  But if you get large enough house batteries, you will at least be able to run your fridge for a night or two of dry camping with this system.  By contrast, with no inverter at all and a household fridge, you'd be committed to run the genny every minute you're away from the pedestal.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
NeoplanAN440
Full Member
***
Offline Offline

Posts: 196


1995 MCI 102 D3 running WVO Neoplan AN440




Ignore
« Reply #13 on: April 27, 2010, 10:36:48 AM »

I went with a extra house battery bank connected via HD relays to the 50dn.
they connect to the alternator while running,or i can override to use them for starting also.
i run 2 15k Carrier units on them with no problems.i also have a normal house size fridge on it and all the other small things you find handy.

i started my system small on a budget.i was running two tripp lite 2400 aps inverters.split for front and rear ac and circuit.these are often to get new for less then $300 a piece and can carry for a short time double the load,to start the ac.

the best is for sure the xantrex sw4024.
it runs both ac with power to spare.also its nice that you can program your incomming power max,so you can even hook up to 15A to charge and in case you need more to start ac,the unit will share and then recharge.lots of nice features.i like the sw4024 and it never let me down.
i use it on my house  also,and stacked it runs my welder,lathe.milling machine........


i even removed my 10k isuzu gen and build my own apu from a 6hp kubota mated to 24v alternator.
most gens are oversized and run without enough load to clear out(wet stacking)

my 2 cents
Logged
Highway Yacht
*****Jimmy*****
Hero Member
*****
Offline Offline

Posts: 504


Locust, North Carolina


WWW

Ignore
« Reply #14 on: April 27, 2010, 12:03:33 PM »


I do recommend you use separate batteries.  The inverter will need to be powered up all the time, not just when it is running the loads while driving.  You don't want any possibility that the inverter will accidentally deplete the start batteries.  Use a solenoid powered from the alternator's Relay terminal (or old blower circuit) to bridge the banks together only when the alternator is charging.  You can also use a relay from this same circuit to force the A/Cs off-line in the event that the engine is not running.

You will not use up all the power from the DN50.  Your 4kW inverter under normal circumstances will draw at most 185 amps.  Your DN50 produces 270 amps, leaving a margin of 85 amps, or over 2kW, to charge both battery banks.  Most heavy-duty vehicles have entire alternators smaller than this.

-Sean
http://OurOdyssey.BlogSpot.com


So right now this does looks like the best solution to meet my needs to get current to the rooftop air. Approximately how big or how small of a house battery bank would I need to do this setup to just run the a/c and fridge WHILE the coach is running? I can't think of any situations of where I would need to run the air or fridge for any length of time while the coach isn't running from home to a shore power pole at my destination.
Logged

1979 MC-9  8V71-Turbo / HT740             * www.MciBusTalk.com *
Locust, North Carolina                           A Site Dedicated To MCI's
NeoplanAN440
Full Member
***
Offline Offline

Posts: 196


1995 MCI 102 D3 running WVO Neoplan AN440




Ignore
« Reply #15 on: April 27, 2010, 01:40:28 PM »

if you dont have long times without power or driving,i still would go on a 200ah bank.

the cheapest starter battery bank would be 4 golf cart batteries from sams club. (about $70)a piece.
you have to have them vented outside or in a enclosed box with a good vent to the outside!
if you go with sealed the price goes up.

a set of these will run a normal fridge and other small things plus inverter search mode for about a 24h.
if you take out the defrost mode in the fridge (small timer next to the thermostat) even longer.

you have to watch the cable size and lenght,when placing your batteries.

for the sw4024 i went with 4/0 cable less then 10 feet. (the xantrex manual also covers a lot on this)
i have my battery box next to the inverter in the rear.also the wiring from the main bank or in my case i went from the 50dnshould be sized right!!!!!!
Logged
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #16 on: April 27, 2010, 03:14:01 PM »

... Approximately how big or how small of a house battery bank would I need to do this setup to just run the a/c and fridge WHILE the coach is running? ...


As I wrote earlier, it really does not matter.  The only thing the batteries will be doing will be providing a quick bump of current when the AC or fridge compressor starts; otherwise, the alternator will supply all of it.  Anything used from the batteries in this way will be quickly replaced by the massive alternator.

A bigger issue is the drain while you are parked.  I know you said you can't imagine the case, but I can.  You are driving down the road, and decide to stop for lunch for an hour.  Or you pull into the Flying-J, where it takes you half an hour to fuel up.

While you may not be running air conditioners then (and as I wrote earlier I strongly recommend you set them up so that they shut down with the engine, unless you are plugged in), you will certainly want the fridge to stay running.  Plus the inverter itself has some idle current, and whatever other house loads you have running (vent fans, lights, alarms, etc.).

Of these, the fridge will be the biggest consumer.  If you can tell us more about your fridge requirements, we can guess at battery capacity.  Also, if you will not have a genny, then you need to make an estimate of the longest stop you'll need to make without being plugged in.  But to be honest, I think you are taking a big risk if you can't power your fridge and whatever else you normally use (besides A/C) for at least a full day -- you never know when you might be stuck someplace.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
NewbeeMC9
NewbeeMC9
Hero Member
*****
Offline Offline

Posts: 1167


1981 MC9 8V71, HT 740




Ignore
« Reply #17 on: April 27, 2010, 04:48:29 PM »

the old trace sw4024 has a 60 amp tranfer witch built in,  will sychronizee with campground ac, will start genny and sychronise it, and shut it down, if needed  just to name a few of the things it will do for you. Smiley
Logged

It's all fun and games til someone gets hurt. Wink
JohnEd
Hero Member
*****
Offline Offline

Posts: 4571




Ignore
« Reply #18 on: April 27, 2010, 05:14:34 PM »

I agree with the quality of the "old" Trace/Heart/Xantrex products.  For features they are my pic also.  Problem is that they are not repairable.  Don't take my word call the factory auth repair and tell them you have a Xantrex/Trace number XXXXX and ask for an estimate for repairs.  The most expensive replaceable item is a $200 PC board, not counting the transformer and they said they wanted the cost of a new unit for repair charges up front and they could not guarantee it wouldn't cost more.  This is more of that "we'll consolidate and pass the savings along to the consumer.  SURE!  I think all of Xantrex is made in China now.  Dick Wright QUIT selling Xantrex last time I checked and the reason was horrid fact support.  You might look at Magnum...Dick Wright sells those.  Dick Wright advertises in BCM and his shop is down the street from me and he will talk genny or inverter or battery bank or anything else anytime.


I think Outback is made in Australia and is he best available....I think.

John
Logged

"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.”
—Pla
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #19 on: April 27, 2010, 08:07:36 PM »

...Problem is that they are not repairable.

While Xantrex is loathe to touch these any more, there are quite a few independent shops that repair them.  If you have a problem with an SW series inverter, I have a guy who can fix it.  FWIW.

Quote
....  Dick Wright QUIT selling Xantrex last time I checked ...

Dick sells new product.  Xantrex quit making the SW series years ago -- that's why Dick doesn't sell them any more.  Remember, too, Dick is in business to make money.  I would not read too much into what Dick does or does not carry.

Quote
I think Outback is made in Australia and is he best available....I think.

"The outback" is in Australia.  Outback Power Systems is in Arlington, Washington, where Trace used to be (Outback was started by ex-Trace folks fed up with Xantrex).  Like all technology companies, their manufacturing is contracted globally, mostly to Asia.  I do not believe there is any Australian content in any Outback products.  FWIW, the restaurants have nothing to do with OZ either.

the old trace sw4024 has a 60 amp tranfer witch built in,  ...


I am a big fan of the SW series, but, frankly, the transfer switch is all but useless for conversions.  I have a long detailed explanation of why and how to work around this, but the short version is that it is a single-pole switch, and you need at least two and preferably three poles for it to be useful.

This is the reason why most conversion installations (including those by, umm, Dick Wright) don't even use the internal switch, and make use only of the AC2 input, with AC1 completely disconnected.  FWIW.

I keep thinking I ought to write an article about this particular shortcoming, since so many conversions are using the SW inverters.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
JohnEd
Hero Member
*****
Offline Offline

Posts: 4571




Ignore
« Reply #20 on: April 27, 2010, 11:16:21 PM »

Sean,

What are the sources that will repair a Heart Inverter.  I need help once again.

Thanks,

John
Logged

"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.”
—Pla
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #21 on: April 28, 2010, 12:09:49 AM »

John,

The guy I would suggest would again be Edo.  IIRC, you talked with him once about a Heart unit, although I know he is really a Trace guy.

Hearts are a bit more trouble than the old Trace stuff, for a variety of reasons.  The logic boards for many of the older units are simply unavailable now, unlike the Trace units discontinued more recently.

I know there are perhaps a dozen shops that work on older Xantrex gear, but I am afraid I don't have a list.

FWIW, I don't recommend Xantrex myself anymore, with the sole exception being the SW series inverters.  These units are long discontinued, so your only options there are used or refurbished, unless you stumble across a NOS unit.  And the only reason I continue to recommend these, even with all their drawbacks such as the nearly worthless transfer switch and the hokey ground/neutral bonding problem, is that they are still to this day the only units with the ability to do "load support."  We use that feature all the time here aboard Odyssey, and I wouldn't trade it for any one of the brand new models from Victron, Magnum, Outback, or anyone else.

For those who don't have this need, I generally recommend Magnum.  Outback, while a good product, has chosen to focus on the fixed AE market, which has different requirements.  Victron is focused on the marine market.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
JohnEd
Hero Member
*****
Offline Offline

Posts: 4571




Ignore
« Reply #22 on: April 28, 2010, 12:41:45 AM »

Sean,

Edo started off with such promise.  He sent me the wrong schematic and then wouldn't return my calls.  I was shoving money at him and wanted to hand carry the unit to his shop on appointment and have him test it.  Fell thru.

Can you identify a Heart shop anywhere in the CONUS?  Zantrex also made the Freedom Marine series under their own name as I recall.

Dick was talking with the Magnum factory a year ago and they were trying to get their new model out the door that would do the load sharing that you mention.  I can't imagine why that isn't a priority for them.  They would be the only game n town.

an you get a schematic for the SW series?  On for my Freedom would be worth money to me.

Thanks,

John
Logged

"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.”
—Pla
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #23 on: April 28, 2010, 01:16:50 AM »

Can you identify a Heart shop anywhere in the CONUS? 

I'm afraid I can't make a personal recommendation.  I would start with the list of authorized repair facilities from Xantrex themselves, available here (arranged by product):
http://www.xantrex.com/support/web/id/1088/support1.asp

You could also try:
http://www.inverterdoctor.com

Quote
Dick was talking with the Magnum factory a year ago and they were trying to get their new model out the door that would do the load sharing that you mention.  I can't imagine why that isn't a priority for them.  They would be the only game n town.


I'm guessing the reason it is not a priority is that it is incredibly difficult and expensive to do, and there is really no market for it.  A handful of bus nuts hardly counts.

Remember that Xantrex developed the SW series for grid-tie applications, something which is not relevant (or legal) in a mobile environment.  The load-support feature depends on the non-islanding provisions of the grid-tie capability, and is more or less a side-effect of the utility-interactive design.  Magnum has no such incentive or market at present.

Making a listed RV model of the SW was an afterthought.  This is why it has the wrong kind of transfer switch and no neutral/ground bonding capability, as those features are not required for fixed applications.  In fact, other than submitting the hardware to environmental testing, the only thing they did to make the RV version was change some software parameters.

Quote
Can you get a schematic for the SW series?  On for my Freedom would be worth money to me.


No, sorry, I don't have any sources for these items.  As I have written before, Xantrex considers them proprietary and keeps them closely guarded.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
bobofthenorth
Hero Member
*****
Offline Offline

Posts: 2092



WWW

Ignore
« Reply #24 on: April 28, 2010, 06:21:28 AM »

I don't know what side of the country you are on John but I have had really good luck with John Ashton in Calgary.  He has my Freedom 25 purring like a newborn kitten.  I've been in his shop and he is for real.  He's also trying to be retired and I haven't talked to him for about a year now but I suspect he is still in business.  Phone four oh 3 - 212 - one three eight eight.
Logged

R.J.(Bob) Evans
1981 Prevost 8-92, 10 spd
My website
Our weblog
Simply growing older is not the same as living.
JohnEd
Hero Member
*****
Offline Offline

Posts: 4571




Ignore
« Reply #25 on: April 28, 2010, 08:05:49 AM »

Thank you, Bob.  I will give him a call.

John
Logged

"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
“We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.”
—Pla
Pages: 1 2 [All]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!