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 > Your search for 'Megawatt' found 136 matches.

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  Subject Author Date Posted Forum
RE: RE: Converter problem solution

Aside from vendor performance... One of the great differences between made in China and made in the USA electrical and electronics is that products made in the USA get tested before they are wrapped in cellophane. Even John Marles, of Megawatt who uses far east parts in his products, but circuit boards made in Texas, tests his products before shipping. So does Meanwell, from Taiwan. I mention this, not to criticize but to try and educate. I know of no company that sells converter products that have been operationally tested before shipping. Big companies use circuit testing that probe individual switching and control circuits. Be prepared to be the "Finished Product Guinea Pig". It is the hood ornament of our times and we have to live with it. But live with it as wisely as possible. The whole RV is like that. They don't want to interrupt the line at the factory even if they find an "issue", so they find it is cheaper to send the Rvs out to the dealers and then solve any issues later under warranty. This keeps the line rolling, and some folks might not even notice the issue, so no warranty claims from them. The 5er wee got brand new had a couple of foggy double pane windows, so the dealer tried to get replacements from the RV factory for us. Turned out the factory was behind in getting windows from their window vendor, so any new windows went straight into new trailers on the line, so we couldn't get any. Eventually after much pushing and shoving, our dealer managed to get the windows for us under warranty. It is all about the production line and don't ever slow it down.
BFL13 11/18/17 07:13pm Tech Issues
RE: RE: Converter problem solution

Aside from vendor performance... One of the great differences between made in China and made in the USA electrical and electronics is that products made in the USA get tested before they are wrapped in cellophane. Even John Marles, of Megawatt who uses far east parts in his products, but circuit boards made in Texas, tests his products before shipping. So does Meanwell, from Taiwan. I mention this, not to criticize but to try and educate. I know of no company that sells converter products that have been operationally tested before shipping. Big companies use circuit testing that probe individual switching and control circuits. Be prepared to be the "Finished Product Guinea Pig". It is the hood ornament of our times and we have to live with it. But live with it as wisely as possible.
MEXICOWANDERER 11/18/17 09:25am Tech Issues
RE: Inverter AGM questions

It is but it is not black and white. 90% charges for a week is pushing things. It would be proportionally worse of course at 50% state of charge. I would get a 10 amp portable solar panel and cook the batteries after generator shutdown. A morning charge then 5 hours of sun may produce 40 surplus amp hours in a larger say 400 amp hour bank - during that last 10%. Yes, decreasing the missing ampere hours from 90% SOC to 95% SOC does make a difference. A Harbor Freight 2 cycle generator and 29 amp Megawatt would also work great depending on the noise. Let the little generator run until it runs out of fuel @ 14.4 volts setting on the Megawatt. Absolute Scrooge fuel use. And no attention to anything - put the generator and Megawatt away after it plays possum. I institute "light use days". Charge then shut off all loads and let the panels top things off. Doesn't mean the refrigerator, but lights and other accessories are neutered.
MEXICOWANDERER 11/08/17 08:16pm Tech Issues
RE: New Generator in the mix

Everyone here is correct to some degree. There is nothing wrong with any number of other units but realize that when you do buy a cheaper unit you are getting a cheaper unit. You can compare manufacturer specs all day long but the difference comes in when you put the maximum test to each generator. If you run them maxed out or keep overloading them my money is on a Honda or Yammie. I accidentally plugged a propane frig 120 v into a 400 Aims inverter and instantly blew it's guts out. It didn't pop a fuse, it died. I have overloaded my Xantrex 1000 and 2000 and just reset and carry on. I ran a Megawatt power supply at the high end of it's range and it started smoking yet I can run a Meanwell just as hard and it keeps on pumping it's heart out. I would buy a 3400 Champion or a Ryobi or a Predator BUT I would operate at the lower side of it's ability. If I wanted to size a genny to run at the top end of it's power range I would buy red or blue.
rjxj 11/03/17 11:52am General RVing Issues
RE: Question about using run/start capacitors

This is too much to ask of a thousand watt generator. Figure two things going in....400% start current and a lying generator specification. Correction of waveform harmonic distortion is a completely different animal than trying to make up for surge voltage depression. You will have both. I did this with the Megawatt which does NOT have tremendous inductance of an electric motor. Dolly the A/C unit to the intended generator store. Seeing is believing and remember to de-rate for altitude. I have a COLUMBIA, AC ammeter with needle movement that is dampened almost perfectly. My LG 5K window air required almost seventeen amps at 125vac to start out. A larger cap reduced starting current to twelve and a half - more or less. Waveform correction must must must be designed around the generator stator's waveform under load. It is trial and error via oscilloscope. This is why my KATO stator has twice the copper windings. The easiest move for you seems to be take the mountain to Mohammad. Try it with the generator and if the generator falters, I would consider it a fail. My 900-watt Frightening Harbor generator grunts when starting a 24 foot chest freezer. It cannot power a kitchen refrigerator already running and start the freezer. It is E CAVEAT EMPTOR when buying a generator.
MEXICOWANDERER 10/30/17 03:32pm Tech Issues
RE: More WFCO Woes

Returning to magic mushroom land of WFCO I purchased .003" sheets of carbon graphite. Before the Wiffie barfed I set a small barrier between the resistorus erectus and the capacitor. It dropped temperature by 25F. Even a tiny muffin fan on that side of the circuit board makes a huge difference in component temperature. Two choices with the original fan - go higher CFM or give the perverter a lobotomy. Eliminate the fan and go with a smaller one like mentioned above. The Hyperwatt has a replacement for the original Megawatt fan. 30% more watts. Then a larger fan in the front of the case blowing straight down onto the toroid chokes and transformer. The build-it-cheap philosophy reminds me Chinese aptitude. Takes too long and costs to much to plug things in and see if they work. SHIP IT! I'd take a bet not one WFCO executive Boondock RV's. And if one did they would be using a competitor's converter. Recycled electronics in the US --- where do they go? I can see trying to recover copper, tantalum and a bit of gold, but the process would be net sum minus. Oh well, I have a prohibited from sale in California battery charger to fix. Mail all of your non fixable electronic chargers to... Governor Jerry Moonbeam Brown 1315 10th St, Sacramento, CA 95814
MEXICOWANDERER 10/28/17 05:17pm Tech Issues
Amazon's Jeff Bezos Just Opened A Massive Wind Farm In Texas

video Amazon has announced that its biggest wind farm to date is operational. In a statement on Thursday, the business said that Amazon Wind Farm Texas would add over 1 million megawatt hours (MWh) of clean energy to the grid annually. The facility, which is located in Scurry County, has over 100 turbines, each standing more than 300-feet tall and with a rotor diameter over double the wingspan of a Boeing 787. He and Bill Gates are the two richest people on the planet but I would bet his company Amazon paid for it. He does own the aerospace manufacturer Blue Origin that lands rockets in Texas after going into space. video
8.1 Van 10/20/17 03:40pm Around the Campfire
RE: Wfco amp test.. What are you pendant guys getting?

Time is money when using a generator to recharge a battery. If a charger does not have a correct voltage profile you pay for it in wasted fuel. With a manual Megawatt, a 36 amp model I guarantee I can fully recharge a battery in One - Third the time it takes your WFCO. With my big manual charger I slice twenty minutes more. No brand of automatic charger can do this but trying to make a WFCO into an optimum charger is like hiring a one-armed brick-layer. Or buying Lucas electrical parts to gain reliability. An oxymoron with oak-leaf-clusters and diamonds.
MEXICOWANDERER 10/11/17 12:02am Tech Issues
RE: Megawatt Inrush And Small Generators

I think i know what he is saying The cap goes across the megawatt input, It will be charged when you hold the pushbutton switch closed It will be charged at the RMS voltage level It is NOT going to go from zero to 178 back to zero The stored RMS 120v will add Momentary starting current to input/, induction circuit of the mega watt, allowing a small generator to energize the circuit and charge batteries It's not the 700w charging that stops an 800w generator, it's the inrush current very similar to starting an induction motor like a compressor Since a run cap is designed to be left in the circuit, using it as a momentary start cap will not hurt it, and if needed , it could be hard wired to the mega watt and left in the circuit, The input of the megawatt becomes an LC load circuit, not just An L load I am sorry, but what you are saying about the capacitor is simply not true. The voltage across the capacitor is and must change 120 times per second! First Half Cycle ... The voltage across the capacitor ramps to +170 Volts peak. Then it ramps down to 0 Volts. Second Half Cycle... The voltage across the capacitor ramps to -170 Volts peak. Then it ramps down to 0 Volts. These two half cycles will repeat 60 times per second while the button is pressed. The Voltage is AC = Alternating Current, NOT DC. The capacitor charges and discharges 120 times per second. Nothing that you say, can stop this from happening. Nothing.
mvas 10/10/17 12:26pm Tech Issues
RE: Megawatt Inrush And Small Generators

I think i know what he is saying The cap goes across the megawatt input, It will be charged when you hold the pushbutton switch closed It will be charged at the RMS voltage level It is not going to go from zero to 178 back to zero The stored RMS 120v will add Momentary starting current to input/, induction circuit of the mega watt, allowing a small generator to energize the circuit and charge batteries It's not the 700w charging that stops an 800w generator, it's the inrush current very similar to starting an induction motor like a compressor Since a run cap is designed to be left in the circuit, using it as a momentary start cap will not hurt it, and if needed , it could be hard wired to the mega watt and left in the circuit, The input of the megawatt becomes an LC load circuit, not just An L load
MrWizard 10/10/17 11:25am Tech Issues
RE: Megawatt Inrush And Small Generators

A pushbutton contact switch called momentary only connects while being pressed. Wire the pushbutton switch as a very short umbilical to the Megawatt on off switch. So when the pushbutton switch is pressed the capacitor will charge up Exactly how starting capacitors work on a motor, except it is automatic.
theoldwizard1 10/08/17 12:20pm Tech Issues
RE: Megawatt Inrush And Small Generators

....and you thought that inbred-looking banjo player sitting on the bridge could duel versus a guitar... IN A CRUNCH... Small generator. Too small. When the switch is flipped to start the Megawatt, the generator dies... The Megawatt needs it's own switch no matter what. Use the capacitor as noted in the given link. A pushbutton contact switch called momentary only connects while being pressed. Wire the pushbutton switch as a very short umbilical to the Megawatt on off switch. So when the pushbutton switch is pressed the capacitor will charge up Got it? Start the generator Push the capacitor button down and keep it down...until... You flip the Megawatt switch The generator should "grunt" when you push the capacitor button And grunt again, when the Megawatt switch is thrown. No more generator stalling out. But if you release the pushbutton and the generator stalls, yank the pushbutton out of the circuit and leave the capacitor connected permanently. Beatzuh heck out of buying another generator. ***The cap hookup goes on the generator side of the on/off switch
MEXICOWANDERER 10/07/17 07:29pm Tech Issues
Megawatt Inrush And Small Generators

In the interests of accuracy I have copied John Marles, comments verbatim and they appear below "Inrush is 50A/115VAC 50A/230VAC for a few milliseconds on the S-400 and S-350. Its controlled by duel thermistors. For the small generators some large start caps would solve the problem as long as those don't trip the generator while charging" Thank you, John My comment... Choose RUN capacitors, switch power to them first then enable the power supply. It's a great aid to ease startup current burden. RUN capacitors are not expensive http://www.surpluscenter.com/Electrical/Capacitors/Motor-Run-Capacitors/50-MFD-370-Volt-AC-Run-Capacitor-Genteq-22-1358.axd
MEXICOWANDERER 10/07/17 12:57pm Tech Issues
RE: Critique proposed solar battery upgrade

I don't have the scenario for how often you would want fast charging off the gen and what the gen hours might be in the campground. Or how much gas you would need for the gen while it runs forever, and how far to get some more. Everything is about the scenario. EG with the Honda 3000 in the truck bed I just fill the gen when it needs some (not often) when I am filling the truck (often) All I can say is that it will take "forever" to recharge any decent size bank with a typical RV converter. Also no converter seems to be adjustable voltage except the charger in an inverter/charger or else these PowerMax adjustables. There are some Meanwell or Megawatt adjustables but they are at lower amps--good for a smaller bank or lots of gen time on a bigger bank. The battery specs these days seem to be anything other than what RV converters do, so you really need an adjustable voltage one. But then Mex says ignore most of that, because the battery specs are dubious anyway. Beats me! You can go to about 27% charging rate on an AGM like mine, so four of those 100Ah jobs would accept 108 Amps set to say 14.8 v. How to do that with your 14.4v 55 amper? So out comes the PowerMax 100amp ADJ raring to go :) But now you need more than a 2000w gen to run it. So sad too bad. "They" don't make it easy for an RVer to assemble a proper set-up. :( I also like having the portable extra charger in case the converter dies while on a trip. You can still operate by using the "spare" charger. On the solar side, you have many choices and I can't say what would be best. EG, I don't know the roof space options on the trailer. I have no problem with two solar controllers in parallel on the same battery bank. BTDT. One set up I ran for a while had my big inverter just on the two T-1275s and they had their own solar set, while the rest of the RV ran on its own set of batteries and they had their own solar. You can do just about anything and it all works. I am just unclear what's so wrong with what you have now that you need to change anything for the new trailer. So you are the expert on that. :)
BFL13 09/28/17 04:14pm Tech Issues
RE: What to do with Generac having bad board?

Dennis12! Now yer talkin'! Send the board to circuitboardmedics with the instruction. UPGRADE FAILED COMPONENTS. Did not DINOSAUR revolutionize the repair of RV accessories? Depends on the repair price though. I made my own 5 station start/stop fault shutdowns on commercial fishing vessels and they lasted longer than I kept track of them. Not five stations total, vessels with five stations. Fault shutdown memory. Upgrading is why I can get reliable 56 amperes full throttle performance out of a 35-amp rated Megawatt. Cost of parts 19 dollars. Run around and price a 55 amp power supply. Better yet, wait five years and see which one continues to deliver 55 amperes 24/7 KUDOS! Sir! https://circuitboardmedics.com. goes into my directory
MEXICOWANDERER 09/27/17 11:12am Tech Issues
RE: Generator questions!

K.I.S.S. reigns supreme. I'm retired, but have plenty of other things to take up my time besides figuring out how to supply external control signals to that power supply in order to set it's voltage and current outputs. I read it's .pdf manual ... and couldn't see where any readout meters or control knobs were located on it's chassis. It has DEFAULT controls EXACTLY the same as any Meanwell or Megawatt. Exterior potentiometer. Using the OPTIONAL current, voltage and sense lead is exactly that, OPTIONAL. It's all discussed in the online nomenclature. Mr. Wizard's greatly appreciated link to an INDUCTIVE panel ammeter would be a simple to add aid. No one who Boondocks should be without an accurate ammeter and voltmeter. The last thing I expect to do when boondocking is sit on my --- watching television and controlling my environment with a remote. I have to force myself to actually arise out of a chair to perform chores. Toss the "campfire light and adjust flame" remote into a drawer and walk around - it's good for the heart. The nice thing about manual (voltage limited) battery charging is the process is not a Gyro Gearloose lab experiment where a bit too long equals a mushroom cloud. Having a battery sit for a half hour after minimum amps is achieved isn't going to hurt the battery at a 14.8 volt charging limit. But who in the world starts a generator to recharge batteries forgets about it? The ergonomics is absurdly simple. If it took three hours the last time to recharge them from 50% what would make the "next time different if the same hotel parasitic draw was reasonably the same? Set an audio timer on a cell phone or any other type of timer. For especially stubborn cases rig up a dog shock collar with a timer. Having actually done this and being with folks who charge batteries with a manual power supply I can say the process is absurdly simple and unobtrusive. The key is the generator. Who ignores s generator? Who will forget that it is running? Connecting a power supply to a pedestal is infinitely more important to insure automatic charging shutdown. When pistons are going up and down, and money is flying out of my wallet for fuel and wear and tear, the last thing I need to do is waste my time listening to a generator run endlessly doing nothing. Adding 10 - 20% more ampere hours into the batteries in the same amount of time is important to me........especially on the way back from the gas station with a far lighter wallet. When I start any of my generators, they are going to work and not play games. And I am not going to use excess effort or personal energy in the process. My batteries cost way too much to abuse. Personally, I use a Samsung cellphone's timer to remind me of ANY time important event taking place. The alarm even reminds me to take medicine on time. Choosing to do stuff manually reminds me of my personal joke about whether to perform all the effort to prepare a meal or simply run down to the Golden Arches a McSlider. After all the syntho burger is a no brainer, eliminates hunger pangs, and well dying young from cardiac infarction is, well it is EASIER than doing stuff manually. Charging with a power supply and generator pales in comparison to to actually HAVING TO COOK and wash dishes. How could I ever survive camping without a McSlider and push button dishwasher?
MEXICOWANDERER 09/22/17 01:34pm Tech Issues
RE: Generator questions!

After roaring and fuming, this power supply gets my vote and the only viable battery charger that will do whatever you want it to. . . . http://www.trcelectronics.com/View/Mean-Well/RSP-750-15.shtml Whoa ! Mexico, I thought you were hooked on MegaWatt power supplies. Why the change of heart ? Personally, I think a 50A power supply is overkill for someone with a dual 6V golf cart battery bank. This single unit would be by far the quickest route to charge batteries as used in a stand alone position. The Megawatt intends to be a supplemental charging unit used to augment a "decent" on board converter. The WFCO is an indecent on board converter and folks who rely on a WFCO for boondocking are braver than I. If the converter does what WFCO does "best" a 400 watt Megawatt is just plain too small. This Meanwell pumps out a minimum of 50 amperes and when you calculate a 50 percent SOC acceptance in excess of 100 amperes, suddenly 50 looks like the bare minimum. After about an hour's worth of charging charge acceptance will be falling toward the 50 amp mark but with the unit set at 14.8 volts, it's going to feed far and away more power safely than any brainless smart charger. I chose a pair of modified Megawatts as the heart of the Borg system. Not the least of which is the fact the Borg is two Megawatts meaning backups that are totally interchangeable with one another. More modifications meant a total charger delivery in excess of 90 amperes. And a programmable timer to default from absorbsion to float whenever I wish. And utterly adjustable absorbsion and float voltage limits AND an ability to supply in excess of 40 amperes at FLOAT to eliminate psychotic needless cycling with varying hotel loads. When a person considers it takes a wheeled charger the size of a 7,000 BTU portable air conditioner to do less than what a cigar box size Meanwell can do, the choice is pretty clear. This critter has a remote on/off switch capability and remote voltage sensing capability. There is no one-size-fits-all answer for battery charging. It took a lot of effort from Mr Crippled here to manufacture the Borg. I certainly do not expect anyone in their right mind follow in my footsteps. The Borg has been working 24/7 for years. This is what I demanded. I am going forward with the successor of the Borg, the Hyperwatt. The Hyperwatt will have twin 56 amp Megawatts, but the float unit will use an ultra heavy duty thermistor to compensate temps from -20F to +122F
MEXICOWANDERER 09/22/17 02:05am Tech Issues
RE: Generator questions!

After roaring and fuming, this power supply gets my vote and the only viable battery charger that will do whatever you want it to. . . . http://www.trcelectronics.com/View/Mean-Well/RSP-750-15.shtml Whoa ! Mexico, I thought you were hooked on MegaWatt power supplies. Why the change of heart ? Personally, I think a 50A power supply is overkill for someone with a dual 6V golf cart battery bank.
theoldwizard1 09/21/17 05:25pm Tech Issues
RE: RV "Hot Skin" and GFCI?

Yup. Do yourself a favor. Set you DMM on AC amps, stick one lead in the earth, and touch the other lead to the trailer. What do you see*? Always better with an analog meter but a digital will have to do. Power supplies like the Meanwell and Megawatt are famous for absolutely needing an earth ground for safety. The Bipolar transistors are to blame. Regardless of the cause, cure the effect and maintain integrity for safety. On both sides I always look for unintentional bond of neutral to ground.
MEXICOWANDERER 08/16/17 11:20pm Tech Issues
Found A Source For 420 Volt 680 uf Megawatt Capacitors

They just fit edge to edge (fatter but not extremely tall), lead for lead and come within a hair of the roof cover. 105c, extremely low ESR mil-spec. New old stock Navy shipboard stuff. Beatza snot outta original 680uf 200 volt 85c capacitors. Going to place an order this week. They have been stored in Henderson Nevada so they enjoyed bone dry air. Owner says they have been "sealed" in preservative bags at his place since 1998. I am going to purchase (20) Even my Meanwells use the same caps at the Megawatts.
MEXICOWANDERER 07/31/17 09:48pm Tech Issues
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