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 > Your search for 'Megawatt' found 92 matches.

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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
RE: Mex's 20% AGM Rule Sucks.

I sure would make things easy to do. Meaning you need minimum size wire to the battery clips. 12 gauge would do fine. A sixteen gauge power wire is plenty this allows the cords to be wrapped around the box and stowed easily. Use a 3 wire power wire with a ground. If you're on the road a week every day, wait. When charging becomes intermittent then once a week with the Megawatt is plenty. When floating at home once a month is plenty. You can tweak the potentiometer to 14.7 and use this thing to faster charge wet batteries too. When a converter or charger wants to lean on a shovel hook the Megawatt up and reduce finish charge time by 90% This really helps when using a generator.
MEXICOWANDERER 08/22/18 10:03pm Tech Issues
RE: Mex's 20% AGM Rule Sucks.

I agree, you don't need more converter. I'd take the megawatt along on trips--its not that large. I am all in favor of some solar however.
pianotuna 08/22/18 09:50pm Tech Issues
RE: Mex's 20% AGM Rule Sucks.

So I would just use the MegaWatt as a specialty battery charger at home for AGM batteries. So how long can I be on the road before the topping off would be necessary? I drive my Class B as a second car so it would get some lower voltage charging a few times a week even when we are not on a road trip. Would I add some top off time from the MegaWatt every so often even if I haven't discharged the AGM batteries from use?
JimBollman 08/22/18 07:15pm 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.
MEXICOWANDERER 08/22/18 06:42pm Tech Issues
RE: Proper Wire Terminal For Oriental Terminal Blocks

JaxDad Did you pick the lock to my place and uncloak the BORG? I stripped a 4/0 THHN cable to get the 12 gauge solid strands. They soldered right to the Megawatt terminal strip. All three feeders are paralleled each polarity. It's a lot of work doing that to the two units. ANYTHING YOURS WILL DO MY BORG WILL DO BETTER Online 24/7 for SEVEN YEARS Try having a battery fully charged in float mode then loading it with 35 amps What happens? Mine stays in float varying not a tenth of a volt while the charger is supplying 35 amps. Consumers have been trained whip and chair to be satisfied with inadequate garbage. "It sez smart and that's as good as it getz"
MEXICOWANDERER 08/15/18 09:36pm Tech Issues
Proper Wire Terminal For Oriental Terminal Blocks

You've seen them. Center screw with corrugated like flat tab washer beneath. Screw head uses that goofy straight blade phillips combo. I'm supposed to attach a pin to the largest wire that will fit the pin (14 AWG) then push forty amps through this terminated pregnancy of a connection? What am I missing? On Meanwell and Megawatt 400 watt power supplies I came off of EACH screw with a hand formed Y copper strand wire with wire strands soldered and had to make a Triple 14 gauge wire to single cable junction in order to get a pair of 10 gauge wires as main power connections. One and a half hours to connect a single feed terminal block output is stupid. I used the so-called-pins under the nn washer screws. Neat. They clamp down on a 45 degree angle and under high power they are guaranteed to thermally loosen (been there done that in excess of a dozen trials) Tighten the screws reasonably well and the pin flattens. Dumb and dumber design wouldn't be an issue it there are alternatives. There aren't. Push 40 amps through a single terminal and then touch it. Prepare to have flesh fused to frying pan terminal. #2 spade by 16-14 AWG would work. Where does a person look for this terminal?
MEXICOWANDERER 08/15/18 12:12pm Tech Issues
RE: Solar wasted watts/volts

Another option would be to limit your MW use when on solar.Avoiding megawatt usage with TT solar is always advisable.
mike-s 08/11/18 07:14pm Tech Issues
RE: Buying an AGM online?

Mr Tuna: When it got to me, it was at 12.39v. A bad sign already. On the smart charger, it got up to 12.85. I couldn't get it any higher with the megawatt at 14.7 volts. I'm not a battery expert, but I thought this seemed like it is probably a POS. Is that right? Not necessarily. Many are fully charged at 12.84V. Depend on the manufacturer. That came up in the other thread, right? And Mex said no, they really should be over 13? I don't think you replied to him. I thought that meant that you agreed with him, but maybe you were just being polite? Do you (or anyone here) know what voltage a full charge should be on a Johnson Control battery? I don't think they have a customer-facing helpline, do they? And the guys at the local AutoZone don't even know that AGM are different from wet. Edit: Well whattaya know, I found a customer service number for them. Not open till Monday of course. Putting it on my list.
Naio 07/27/18 07:28pm Tech Issues
RE: Buying an AGM online?

Mr Tuna: When it got to me, it was at 12.39v. A bad sign already. On the smart charger, it got up to 12.85. I couldn't get it any higher with the megawatt at 14.7 volts. I'm not a battery expert, but I thought this seemed like it is probably a POS. Is that right? Not necessarily. Many are fully charged at 12.84V. Depend on the manufacturer.
jkwilson 07/27/18 07:01pm Tech Issues
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