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RE: Megawatt Component Food

It's directed solely toward readers who know what a Megawatt or Meanwell is. It saved me writing an additional 500 words that would be just as misunderstood. Power supply upgrade. Makes it more failure resistant.
MEXICOWANDERER 11/18/18 07:23pm Tech Issues
Megawatt Component Food

Does this listing you browsed still catch your eye? eBay Hello, is this still of interest? You recently browsed 2x 680uF 400V Snap In Mount Electrolytic Capacitor 680mfd 400VDC 400 Volts 105C 2x ... Sold in pairs. Double the voltage and 20C higher heat rating than OEM Schottky diodes are 80 amp rather than 20, with 200 PIV rather than 100.
MEXICOWANDERER 11/18/18 02:23pm Tech Issues
RE: How much converter/charger is really needed?

BFL13 the only way to get an answer comparing full saturated charging and a maniac depressive converter, is to directly compare them both. I save well over an hour 50% - 100% I do not have the open ground nor money for 100 amperes @ 28 volts for panels. And my batteries are unforgiving of 40-90 constantly. Tropic blend electrolyte. Bobbo you can save your money for a bigger bank and more generator run time. The difference in amperage and time would be negligible. Maybe save 15 minutes 50-100%. I invite anyone anywhere to 50-100% charge (using specific gravity as the guide) a battery rated double in amp hours vs INITIAL charger output fixed voltage set at 14.8 versus 14.4 wimping down to 13.6 volts automatically. Use a CLOCK. Use a hydrometer then tell me the difference in minutes between the two charging sources. No handheld wizards dongles or other paraphernalia. Just a simple converter like the OP uses. Versus a constant voltage charger source set at 14.8 volts. Again! The battery cannot be more than 85 ampere hours to get a true and accurate reflection of saturated voltage regulated charging. The 400 watt Meanwell or Megawatt will do fine. Remember! Fixed voltage.
MEXICOWANDERER 11/13/18 10:16pm Tech Issues
RE: best practices for long battery life

"best" can be taken to extremes, as others have pointed out. The money spent on equipment which can perform the 'best' especially if one wants it to be semi automonous will cost more than a few new group 24's. Good to very good means not overdischarging, and returning to full charge regularly, and fairly promptly. Very good to excellent longevity means shallower discharges, more prompt rechrges to an absolute true full charge determined with an Hydrometer, and then temperature compensated float charge afterwards. AN AGM battery is not immune to chronic undercharging, likely the opposite and for a higher price, but if one wants to insure a full charge, and can achieve absorption voltage easily, then an ammeter can easily show true full charge, as dipping a hydrometer into 6 or 12 cells is not something many people consider fun. The Megawatt set to 14.4v can easily get the battery neophyte into the good to very good longevity for not very much money. The 'Smart' chargers are all marketing lies which are 'justfine' for a garage charger doing the occassional starting battery, but not a regularly deeply cycled marine battery, or actual deep cycle battery for that matter. Getting a 'smart' charger to actually fully charge a regularly deeply cycled battery is an exercise in futility with few to no exceptions, and they hydrometer will prove this. But there is bliss in ignorance and ignorance in bliss, and batteries are only rented, so draw a line in the sand and take it as far as you want.
landyacht318 11/04/18 08:34pm Tech Issues
RE: best practices for long battery life

This battery has 25% more capacity than a deep cycle group 27 https://batteryguys.com/products/lifeline-gpl-31xt http://www.megawattpowersupplies.com/assets/Big_New_Stick_36_Amp.jpg height=500 width=500 http://www.megawattpowersupplies.com/ The two items would do the trick provided you do not accidentally or or purpose drain even more power overnight. Setup on the Megawatt is easy I'll help you via private message. You will need a digital meter and a tiny flat screwdriver. Adjust Megawatt once for all timeHow easy it to use?Plug it in when you get home then disconnect it anytime the next day. Proper care is a snapNot need to maintain it in the off-season. Charge it and leave it disconnected. No need to remove battery, just disconnect the negative cable to the trailer. The Megawatt stays disconnected during the off seasonThis ad says it ships direct to your door stepBut the main thing thing is this is a way better setup and the 100.00% full recharge is goofproof and no screwing around with dials and gauges. Plug it in for the night.
MEXICOWANDERER 11/04/18 03:53pm Tech Issues
RE: best practices for long battery life

Easiest solution and it isn't perfect... Switch to AGM batteries. A pair of group 31's When you get home plug into a MEGAWATT or MEANWELL power supply set at 14.4 volts. Let the batteries charge overnight. The next day shut down the power supply and connect to your regular converter. This may well extend battery life into the 10-14 years of service. No it isn't cheap. No it isn't hand's free But it is rational and yes what I wrote will occur. You can bank on it.
MEXICOWANDERER 11/04/18 10:49am Tech Issues
RE: best practices for long battery life

Ever been lied to? Status reports of battery state of charge is like staring at the 52 gleaming teeth of a used car salesman's smile. It takes an amp hour meter, with mathematical correction for efficiency of charge to even BEGIN to address a battery's true state of charge. I played with SMART CHARGER reports of state of charge versus reality several years ago and reported the results on this forum. It started the great power Megawatt/Meanwell supply movement then merged with the superior management potential and advantages of solar controllers. You are victim to politicians who have decreed energy waste to be The Grand Enemy at the expense of wasting tens of thousands of batteries. Long ago I penciled out the complexity of designing a hands-off 100% automatic charger control circuit. The cost was enormous. Totally automatic is not feasible nor rational.
MEXICOWANDERER 11/04/18 09:35am Tech Issues
RE: Too Simple To Figure Out Dept...!?!

I do not see an inverter as an appliance. It is a device. When I arrive, I take a stroll. With a lighter. Light off the hot water heater, kick the tires, stretch out a hose, and dump tube, yawn, then go back inside. Refrigerator? It's 24-volt powered. One thing I do -not- do is have malfunctions E27, Blinking X's, jammed stairs, trapezoidal slideouts, Jacks that play Jill, Transfer switches, Whiz bang automatic electricity blockers, down here with a power protection device in-line, you iz boondocking as far as electricity is concerned. Time spent troubleshooting = 0.00000 seconds in 25 years. Time spent scratching my *** and fumbling with a Samlex inverter the same. The A/C units cool individual rooms. So I plug into a decrepit duplex receptacle and extract 4 amps. Need to charge batteries? Twist timer on a 500 watt Meanwell charger. Need a step? Toss down a crate. Need to level? Drive up on wedgees. Oh I forgot, all this means I need to wash my hands. But I should do that anyway after handling the hoses. What this chatter is about, is that "smart" has revolved 360 degrees and is biting itself in the *** My smart repair bill last year was $0.00 How about yours? My smart diagnostic time last year was 0.00 seconds. How about you? This is NOT CRITICISM. It is meant to serve as a sense of perspective. As far as the Samlex inverter is concerned, I do not own a programmable inverter. I own the BORG and several Meanwell and Megawatt power supplies. I am fortunate enough to not have to bother with programmable battery chargers or inverters. Like a country hick I watch city bred svelte smart schtickers scrawling on their smart phones desperately seeking even more apps to load and walking into a streetlamp pole. I remain amazed...
MEXICOWANDERER 10/24/18 08:18pm Tech Issues
RE: How Does a Converter Hold its Voltage?

From too much experience, I can safety state that no large cheap power supply I have seen will maintain rock solid voltage regulation from no load to full load. The best of my bunch is a Lamda which within range varies an astounding .02 within a wide input and output range. It's cost induces sticker-shock. Meanwell and Megawatt all droop .2 to .3 volts open/circuit vs a 2 amp load. My Chinese bench 0-60vdc 10 amp power supply droops to the hundredths of of volt.
MEXICOWANDERER 09/22/18 02:14pm Tech Issues
RE: WOW The Middle Of September And No Hurricanes!

Never had a tornado here in Michoacan but I damned sure know what all the hubbub is about. With the earth burping, climates are going to change whether we like it or not. It's like a gigantic forest fire advancing. No one is talking about prepping for changes, they're all busy pointing fingers and asking who uses matches. Be smart shun the latter and join the former. I'm trying to get the ejido to drill our well depth deeper from 8 meters to 50 meters then use a jet pump assist. The Harbor Freight, 800 watt 2-cycle generator can start and run a good size 16 cubic foot refrigerator or power a 40 amp Megawatt battery charger power supply. It runs 5 hours on a quart of gasoline and 50-1 2 cycle oil. This can be one heck of a handy thing to have if power goes out and roads are closed. BEWARE BEWARE BEWARE of buying sensitive perishable items if power is lost for a day. Especially vulnerable is chicken, chilled cebiche, salads, and seafood. I go vegetarian if away from home where stuff is maintained via generator if necessary. The HF 2-cycle does a fine job keeping freezer contents at the beach hard frozen. RV generators suck fuel like a high school football team chomps hamburgers. Coupled with inferior converters to charge too small a battery bank, traditional RV setups fend pathetic with extended power outages. Luckily, vulnerable Pacific coast resort cities like San Carlos / Guaymas, Mazatlan, Puerto Vallarta and Manzanillo have nearby power plants. I have no idea where Zihuatanejo's power originates / Acapulco? My pueblo is 50 miles away from the Rio Balsas / Lazaro Cardenas plant and it is vulnerable. Even though chocolate brownouts and outages have become less common I have no illusions what a category 2 and higher hurricane can do. The thing is, roads are closed, you cannot just raise the jacks and flee. But summer along the tropical coast is 100 times more beautiful than winter. It's like the difference between Rocky Mountain summer and winter. The stores and outdoor markets are flooded with fruit, the senses are overwhelmed with tropical flower aroma, and restaurants actually have tables by the windows and no waiting line.
MEXICOWANDERER 09/13/18 09:59pm RVing in Mexico and South America
RE: Confusion on battery charging

UNTIL your batteries have been brought back to life yes it's going to take a few hours to fully charge the batteries. You are stuffing those amps into INCREASED capacity :) Once your batteries have been mini conditioned correctly you do NOT have to do this each charge cycle. I would do it every 14th cycle and then it will not be the same time-eater as it is now. It will take 1/4 to 1/5th the time normally but you are not treating your batteries normal deep cycle duty. So they will recover much faster. Shallow cycles and occasional 100% charging is battery heaven for the Lifeline. But fail to recover to 100% charged for a year or three no matter if the batteries get discharged 20% then you enter the syndrome you are experiencing. I would do as Lifeline suggests and set the Megawatt for 14.40 volts. It can chop an hour or two of recovery charge time versus 14.3 volts. And 14.5 volts does almost nothing except throw calculations off. When you get back to public power I would leave the Megawatt at 14.40 volts for a full three hours. Calcium/calcium is very overcharge resistant. I have left my Lifelines on for 12 hours and they gained 3F at 32c. They are one heck of a good battery. This makes some sense to me. Maybe I fell behind in achieving full charge over the past couple of weeks. The batteries are new as of a few months ago and have only been used for the past month. Before that they sat a couple of months with a 13.3v float. Maybe even new unused batteries need a jolt at 14.3. I left them on float until I started to travel since I was afraid of overcharging with no use and a daily 14.3 cycle. I may have electric hookup tomorrow that should get them charged and then they can bake at 14.3 with the solar. After that things might be downhill. I am traveling to the Olympic peninsula with lots of clouds and fog.
JimK-NY 09/03/18 09:17pm Tech Issues
RE: Confusion on battery charging

They are attempting to -estimate- the amount of time it takes to fully recover to 100%. A stuffed Lifeline. Thankfully the batteries do not need to be stuffed every time. 14 discharges 14 days whichever comes first is my rule of thumb. With solar voltaic time must be purchased. Amperage versus the length of time sunlight is productive. There is a choice a) a small generator and a Megawatt, or double the potential of solar amperage at the initial stage of bulk charge. 100 amp hours of Lifeline = charge acceptance of 100 amps initially. How many hours of sunlight does it take to drop amperage to LESS than potential maximum of panel output? This is "variables city" and it changes by the length and the quality of the solar day. Easy to calculate it isn't. Forecasting this is impossible. 8 hours of beneficial solar but what is the ampere hour yield? Another of my rule of thumbs is ampere hours divided by 40% is a good compromise for high latitude solar panel sizing. Yep 40 amps of panel spec for each 100 amp hours of AGM battery. You have a 40% reduction of harvest at winter solstice on the best of days. It doesn't matter folks You undercharge flooded batteries and you will need to equalize them. Hour after hour after hour. Voltmeter, special amperage throttling, and a hydrometer. Pick your poison. AGM is easier to deal with...period. Hell. I have a tiny 2-cycle Harbor Freight 700 watt generator to power a small Megawatt. Fill the generator, run it until it runs out of fuel, a whole quart and a half. The Lifeline will be stuffed. Sorta dumb to feed a five thousand watt generator to do this... Campground Quiet Hours make it more complex. Then it may be necessary to snow-shovel amps into the Lifeline and maintain a 14.40 volt charge rate at full absorbsion voltage. This means using near 100-amp capacity chargers. I used to generator charge from 8:00AM to 10:00AM with the generator then let the panels take over. When the Kubota/Kato goes online I do not screw around. 500+ amps at twenty eight volts. I am not going to toss my money at millionaire oil speculators. Nor am I going to screw up the best AGM battery on the market. AS far as lithium goes, I wonder how pricey 3,300 amp hours of 24 volts is? Rather spend that kind of money on a Phantom Extended Chassis.
MEXICOWANDERER 09/03/18 04:54pm Tech Issues
RE: Confusion on battery charging

UNTIL your batteries have been brought back to life yes it's going to take a few hours to fully charge the batteries. You are stuffing those amps into INCREASED capacity :) Once your batteries have been mini conditioned correctly you do NOT have to do this each charge cycle. I would do it every 14th cycle and then it will not be the same time-eater as it is now. It will take 1/4 to 1/5th the time normally but you are not treating your batteries normal deep cycle duty. So they will recover much faster. Shallow cycles and occasional 100% charging is battery heaven for the Lifeline. But fail to recover to 100% charged for a year or three no matter if the batteries get discharged 20% then you enter the syndrome you are experiencing. I would do as Lifeline suggests and set the Megawatt for 14.40 volts. It can chop an hour or two of recovery charge time versus 14.3 volts. And 14.5 volts does almost nothing except throw calculations off. When you get back to public power I would leave the Megawatt at 14.40 volts for a full three hours. Calcium/calcium is very overcharge resistant. I have left my Lifelines on for 12 hours and they gained 3F at 32c. They are one heck of a good battery.
MEXICOWANDERER 09/03/18 03:36pm Tech Issues
RE: Confusion on battery charging

I looked up the MegaWatt unit. It is just a cheap 120 to 12 volt charge controller. I think I would spend more and get an automatic 3 stage charger. Anyway I am traveling and do not have that option. I fail to see what is unreasonable about using solar panels. I think I should be able to fully charge my batteries when I am at 90% charge and have sufficient amperage to maintain the absorption charge for close to an entire day. That would be no different than setting the MegaWatt or other charger to absorption and powering it with a generator all day. It just seems that something is wrong when a full day of charging on almost full batteries never achieves the standard for a full charge. The problem with solar is in being able to do the Lifeline's 20% minimum amps for the Bulk stage. 300AH would be 60 amps. Even if you could do that starting in the morning, that would mean your array could do much more by mid-day so that would be a huge array. 270w flat on the roof might do maybe 15 amps at noon? So it is not going to do much early in the morning. However, if you are starting at 90% SOC, you would see a fast rise to Vabs of 14.3 with a very short time in Bulk, and tapering amps from there on. You can get to full that day. What I don't know is if that means your "full" will not be down to the 0.5a/100 idea, since you didn't hit it with the 60 amps during Bulk.
BFL13 09/03/18 01:12pm Tech Issues
RE: Confusion on battery charging

I looked up the MegaWatt unit. It is just a cheap 120 to 12 volt charge controller. I think I would spend more and get an automatic 3 stage charger. Anyway I am traveling and do not have that option. I fail to see what is unreasonable about using solar panels. I think I should be able to fully charge my batteries when I am at 90% charge and have sufficient amperage to maintain the absorption charge for close to an entire day. That would be no different than setting the MegaWatt or other charger to absorption and powering it with a generator all day. It just seems that something is wrong when a full day of charging on almost full batteries never achieves the standard for a full charge.
JimK-NY 09/03/18 10:00am Tech Issues
RE: Confusion on battery charging

AMAZON MegaWatt (™) S-350-12 30 Amp 9.5-15 Volts Adjustable Ham CB Radio Power Supply 13.8V 12V 33A Peak Not a Clone Real MegaWatt MW by MegaWatt® 4.4 out of 5 stars 65 customer reviews Share $59.00 & FREE Shipping + $5.61 estimated tax New
MEXICOWANDERER 09/02/18 08:52pm Tech Issues
RE: Confusion on battery charging

The closer you maintain the finish charge rate to one half percent............ AND................ The more you stay away from deep cycle depletion........... The less important the 20% / one half percent rule becomes. For instance a ten percent depleted battery recharged to within 1% of finish amperage in an timely manner may never loose capacity in an excessive fashion. I wish electro-chemical was easier to explain and understand. It would make my life easier. The easiest way to avoid drifting into the hazard zone is to fully recharge the battery. Trying to outguess a 67% state of discharge versus 2.9 amperes finish amperage rate is almost impossible. Loss of capacity is not easily undone. Jeez, for the price of a 29 amp Megawatt, this could be resolved in a snap. Being stubborn about solar reminds me of being stubborn about starting a sailboat engine and having the crew eat three hundred dollars in provisions to save 12 gallons of diesel, or gaining "I sailed the whole way" bragging rights.
MEXICOWANDERER 09/02/18 08:46pm Tech Issues
RE: 12 Volt Lithium Battery Individual Cell Regulator

***Detailed Info Re: Spot Welding How To?*** ...and those strap conductors are spot welded .. NOT soldered to the batteries How about this? 1/8" carbon rods held with alligator clips. 10-amp max 60 volt max power supply fully adjustable. I am to believe that the attachment tang and the cell cap are both steel? Place point of negative carbon rod near to where tab is to be spot welded. Push down on tab with positive carbon rod, and remove rod just after bond is made? I can also work with a Megawatt or Meanwell at minimum voltage? https://www.ebay.com/itm/Carbon-Electrode-Electrodes-Round-Cell-1-8th-in-x-12-in/332671946651?hash=item4d74cb0f9b:g:losAAOSw3h1ZWxuL Thank you
MEXICOWANDERER 08/31/18 12:47pm Tech Issues
RE: Mex's 20% AGM Rule Sucks.

That specific Ctek product is a DC to DC converter which is supposed to take whatever voltage the vehicle is allowing, and transform it to 3 stage charging for house batteries, and also be a MPPT solar controller. It is not simply a take whatever voltage supplied and provide 14.4v to house bank always converter. I imagine a 14.4v always DC to DC converter could be done for much cheaper and a member here has done so on his 7 pin trailer harness. Either way, absorption at absorption voltage takes considerable time, and more time as the batteries accumulate cycles. So simply driving and supplying 14.4v is not the end all be all answer, as it might take 6 hours at absorption for amps to taper to 0.5% of capacity, and driving simply to supply 0.6 amps to a 99% charged AGM battery is insane. Also note than unless equipped with the "$martpass" that Ctek is limited to 20 amps output so would only meet the 20% minimum, on a single 100Ah or less battery. Beware of marketing, and the physics defying claims that marketers like to employ in their quest to separate you from your money. The Ctek product might be OK in a small rig whose vehicle voltage cannot be manipulated for better battery charging, and whose house battery bank is small, but it is very pricey for what it is, and is by no means a solution to the AGM's 20%+ 'rule', or the fact that it requires a bunch of time to properly absorb a hard working daily deep cycled AGM. If it holds a 85% charged battery at 14.4v rather than 13.7v, well that certainly is an improvement, but is it worth 300$? A dedicated inverter on engine battery powering a grid powered charger, or a Megawatt or Meanwell power supply set to 14.4v, could easily be more effective for less$$, and the powersuppy can also be used on the grid when that is available for top charging. I have a meanwell rsp-500-15 that I use as a converter, and bulk charger, and portable charger, and it is capable of 40 amps at any voltage from 13.12 to 19.2v. Rated for 500 watts It regularly outputs 600. I've never run it from an Inverter though.
landyacht318 08/24/18 01:40pm Tech Issues
RE: Mex's 20% AGM Rule Sucks.

If you have to buy a https://i.ebayimg.com/images/g/QzkAAOSwZgxbfXf1/s-l1600.jpg height=450 width=500 for fifty bucks on eBay Set the pot for 14.4 volts then when you get home plug in the Megawatt for several hours. That'll make absolutely sure the batteries get topped off right then your converter can take over the float. You do NOT need a converter change, and time spent at 14.4 volts at home is not that critical 3 hours, 5 hours then unplug the Megawatt. This will bypass the most common error in AGM management and can easily TRIPLE the longevity of an AGM. The best $50 you'll ever spend. Hi guys, been gone a while with that Deka 155Ah surplus Telecom thick plate battery. Easy as pie to maintain. Put it on the Megawatt 350,s set the variable pot voltage to 14.4V with mega watt turned on, then turn it off, and connect the battery. Max amps I've ever seen that thick plate Telecom AGM battery take is 20 amps at 14.4V I'd say it's imperative to get it down to 40 or 50% SOC every year or two, and let it take 20 amps off the generator or the pedestal for maybe 4 hours. After that.... when I get back home, pull the battery, store it in the garage and as soon as I get home, put the Megawatt on it for 3 or 4 hours to let it taper charge down to anywhere to from .75 amp to .50 amp charge rate at 14.4V. Battery just seems to keep on doing a really good job, I have to run it 2.5 to 3 days to get it down to 35 or 40% SOC, followed by 2 hours of generator time with the MegaWatt at 14.4V, then the rest of the day, the 150W 9 amp solar panel,again set at 14.4V gets to add another 40-50 amps, while camping. I try to do the generator and 20 amps is all she'll take thing a time or two on every camping trip. I always top off charge the AGM when I get back home. I believe Mex is right, if I continue, I should see 10 years out of this battery, with the way I operate. Do an occasional 50% discharge, and set the volts to 14.4V and let it take all the amps it will handle to a 80% SOC, and then don't worry about the taper amperage rate, keep the volts steady. I feel a deep discharge helps stir up the battery chemistry. I DON"T do a hard drain rate on me telecom, running heavy draw in amps from it. I keep it under a 10 amp draw max, at all times. My Deka telecom doesn't like fast discharge rates, or fast charge rates, due to few plates, and the plates are very, very thick. Price I paid.... $125 for a near new 150 AH Telecom... I knew what I was getting into... works great for off the grid dry camping. Works great with the solar panel, for about a week... then it needs the clean up cycle, or a drive with the alternator on the Touareg, which also has an AGM battery, to get it topped off, to a new campsite. Lucky for me the Touareg also has that AGM battery and a max voltage that I can see on the Scan Gauge as 14.4 to 14.5V. Not enough to worry about, it just works well. The electric drum brakes on the trailer on hard braking session, seems to pull a lot of amps out of that battery.
NinerBikes 08/22/18 11:43pm Tech Issues
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