Batteryminder 128cec1 for mexico

Your theory is interesting, but the battery minder at 8 amps a day isn't going to be enough power, you'd need a much larger battery charger to run at least a fan and lights along with the refrigerator when on 12V and propane. And the charger isn't going to run any air conditioning.

Bill

They do not call batteries "A Bank" for nothing.
Take out an electrical extraction "loan"

Extract "$100 worth" of battery power
They want 15% vigorish $115 dollars to satisfy the loan.

This is all guesswork without knowing make and model of converter. But I can guarantee your converter will be stouter than a microwave oven or SMART electric 120vac appliance.

More hogwash gossip about Mexico. I won't mention using an EMS - as you asked a specific question.

The inverter is a Magnum MS2812, 90% efficiency, with a 125 amp charger.

The idea is to use poor voltage campground power to replace some/most of the amps we use each day. Would use the gen or, if traveling, the alternator to get bak to full charge perhaps weekly.

Sort of like having solar to provide most juice, then topping off every 5 to 7 days.

Mexican low or high voltage will not "damage" the Magnum battery charger. I suggest you use that to recharge your batteries. Early morning hours are the best quality electricity hours. 5PM - 11PM the worst hours. Minimize your hotel loading during battery recharging.

Stuff that could care less about electrical quality include anything that uses a power brick.

Please note carefully what I am about to write...

Bad rap about Mexican power is overblown. Why?

99% of filter and suppressor networks relay HEAVILY on earth ground integrity. MOV and TVS connection from line to earth ground.

And a huge majority of Mexican campgrounds AND homes AND business do not wire a receptacle with the third wire an earth ground wire.

Buy one of those cheapo adapters that convert a 2 prong receptacle to a three prong receptacle. See the little metal tab sticking up the one with the hole in it?

That's connected to the ground terminal the missing third prong wire.

Solder a length of flexible GREEN 12 gauge wire to this tab. It needs to be plugged in ANYWHERE that the green wire can dangle and reach gravel or soil. Sometimes you can do it right at the campground plug-in receptacle. That's the easiest place. On the dangling end of the green wire connect the green wire to a mean-ass battery charger battery clip a USA auto parts store item.

Now to a USA hardware store. You need to buy FOOT LONG SPIKE. WHATEVER. It needs to be pounded into the ground so the new green wire clip can be clipped into it. After the spike is driven and the green wire clipped on, pour a full gallon of water around the spike to wet the soil.

On Quicksilver I use the outdoor receptacle near the doorway to plug in my adapter plug and wire. The spike is driven in under the rig to prevent tripping over the wire.

The adapter plug can go ANYWHERE in your site on your rig. It doesn't matter.

Doing things this way CAN SAVE YOUR LIFE if the campground receptacle is mis-wired.

Now your components are protected and it cost you next to nothing.

Thanks for the clear description of how to provide an earth ground when it's mising. Added to my todo list.

My inverter/charger will handle 60v to 140v so would be an excellent option. However, as wired, if it sees ac input, it passes it through to ac loads as well as converting some to 12v for the charger.

Will check with Magnum to see if its possible to wire it so both the charger and inverter can operate at the same time. If so, will hire it done, way above my pay grade. Would be the ideal solution.

best thing for low voltage is a transformer/line conditioner between the low shore power and the RV

the next best thing is to unplug from shore power and use batteries an 'invert' to 120v

recharge batteries from generator/solar/ or good shore voltage

there are several brands and models of auto-transformers, for getting good voltage

8 amps seems weak to supply an RV with 3x 8D AGM and a Magnum inverter. (or are they really GELL?)

I would think more in line with Victron Centaur Charger 12/100 good at 90-265v 50-60 Hz.
Lower ratings available too but this one should keep the air conditioner running :)

98% of the power poles down here have the cheapest contrator grade 15-amp receptacles. The very largest cities may have THHN wire but for the most part only stranded is available. 14-gauge conductor is common, 12 gauge is not normally used. It gets hysterical.

Over half of the receptacles I take apart have 4 or more wire strands frayed from the wire bundle under the attachment screws.

There are ZERO wire nuts in an RV park wire network. Plastic wire nuts like the Ideal are all but unknown. The "electricians" twist wire bunches together using lineman's pliers. Then chinese electrical tape is wrapped around the bundle. Even large trunk wires are spliced this way.

It's best to not go anywhere near the limit of the receptacle amperage.

To thwart abuse, response to site electrical problems is slow to make it sound kind. Ahorita, means a ten year old kid took off on a bicycle to locate the electricista who either is suffering from a hangover or busy at another job with no way to reach him. Be gentle with power consumption, especially if the park is busy.

If management hears an A/C you get unplugged so avoid A/C fan only.

There are exceptions to the above but they are not common.

Having EMS means no power much of the time.

Hope This Helps