Coast Resorts Open Roads Forum: Tech Issues: Transfer switch
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wildtoad

Blythewood, SC

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Posted: 11/15/23 12:44pm Link  |  Quote  |  Print  |  Notify Moderator

I think what he’s looking for is a switch to output 120v IF available from source A, otherwise120v from source B.

In my mh I have 110v from converter (A) feed such a box (Xantrex ProWattSW). I have the 110v output from a 1000w inverter (B) also wired to the box. Output from the box feeds a standard socket. If the box senses 110v on from the converter it passes it through. If not it uses the 120v from the inverter. The latter assumes the inverter is actually on. Mine has an on/off switch inside a cabinet.


Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT

RLS7201

Beautyful Downtown Gladstone, MO

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Posted: 11/15/23 03:52pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

Almot, Some inverter chargers have an autoformer built in. That's the route I chose. That means the transfer to the inverter is totally seamless.

Goodbye to so many talented folks. I suspect lots may drop out after today.


Don, why are we loosing those talented folks?

Thanks
Richard


95 Bounder 32H F53 460
2013 CRV Toad
2 Segways in Toad
First brake job
1941 Hudson


Michelle.S

Western NY till fall, then Sebring, FL

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Posted: 11/15/23 04:46pm Link  |  Quote  |  Print  |  Notify Moderator

It's a Magnum MMS 1012, 1000 watt inverter/45 amp battery charger.


2018 Chevy 3500HD High Country Crew Cab DRW, D/A, 2016 Redwood 39MB, Dual AC, Fireplace, Sleep #Bed, Auto Sat Dish, Stack Washer/Dryer, Auto Level Sys, Disk Brakes, Onan Gen, 17.5" "H" tires, MORryde Pin & IS, Comfort Ride, Dual Awnings, Full Body Paint

pianotuna

Regina, SK, Canada

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Posted: 11/15/23 05:19pm Link  |  Quote  |  Print  |  Notify Moderator

Michelle.S,

That might be a hybrid unit. Try turning on the inverter while connected to shore power. Unplug and see if it transfers over.

Mine is the 3012 Magnum--and it does have the autoformer that allows "load support".


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

pianotuna

Regina, SK, Canada

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Posted: 11/15/23 05:21pm Link  |  Quote  |  Print  |  Notify Moderator

Hi RLS,

I sent you a private message.


RLS7201 wrote:

pianotuna wrote:

Almot, Some inverter chargers have an autoformer built in. That's the route I chose. That means the transfer to the inverter is totally seamless.

Goodbye to so many talented folks. I suspect lots may drop out after today.


Don, why are we loosing those talented folks?

Thanks
Richard


wa8yxm

Davison Michigan (East of Flint)

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Posted: 11/16/23 04:15am Link  |  Quote  |  Print  |  Notify Moderator

I would not recommend it... Here is why
The converstion from 120 volts to DC is at best 90% efficient
The conversion from 12 to 120 also at best 90%
And with that switch. when it clunks.. you are now looping With the inverter powering the converter powerign the inverter and loosing 20% every time it goes around.. Batteries swiftly dead.

A betteroption.. Using same switch.

install MAINS to the Generator leads (Mains is the shore cord)
INverter goes to the Line in (Shore connectio) WHY Because the Generator leds are what sense the need to switch

Now pull a fused or breaker protected branch off the Shore cord (The Generator terminals on the device) to power the converter.

NOW the converter is EXCLUSIVELY on shore power.

Or better yet install a 2nd power panel and put only SELECTED loads on that panel. The Entainerment system. and Microwave Bedroom and bath/kitchen outlets.

Leave the Fridge (If Gas/Electric) on the main panel. Same for air conditioners less you have a whole lot of battery. The E-panel as I call it is run via the switch.

Better still.. Some inverters (like the Xantrex Freedom 2000 XC behind me)( have a switch built in.


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


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