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Old 04-08-2021, 01:47 PM   #1
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Inverter Questions.

So it seems we may have bought another camper.

The main drawback is it has a residential refrigerator with no inverter. It lived its life on a lake in the south and when the RV refrigerator went bad it was replaced with the residential one--Price and the camper not moving was a big factor.

So to fit our life style and not being able anytime soon to get a 18 cu ft rv refrigerator - thank you c___d - we will have to use the one it has now.

Just doing a few searches it would seem that i need a 1000 watt inverter with a built-in transfer switch.

Anyone with any experience with this type of setup or inverters in general your help would greatly appreciated. From my days on the road i have a 1000 watt modified wave inverter but i understand with the electronics today i need a pure wave.

Also the inverter setup would be just to run the refrigerator while traveling maybe up to 8 hours a day.
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Old 04-08-2021, 02:08 PM   #2
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This is what i am looking at https://www.invertersupply.com/index...oducts_id=4884. It is supposed to charge the battery - i will run a separate battery for the inverter - then automatically switch off the 12 volt supply when i plug into 110.

Any thoughts or guidance on this will be appreciated.
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Old 04-08-2021, 05:00 PM   #3
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Hi dagst1,

From what little I understand about inverters, and reading through some literature, I think what you have selected is right on the money.

I found various opinions on current draw from a standard fridge freezer, some in the 120 - 175 watt range and one guesstimate of 725 watts.

What most failed to address is that the peak current is only needed to start the compressor, usually only for a split second, much like the A/C. at which point the drain can be over 1000 watts. Having said that, the inverter you're looking at has a surge rating of 2000 watts, which is well above what you'll need as I'm sure once it's running you'll be in the low hundreds at worst.

I hope this helps, good luck whatever you choose to do, and congrats on the new to you camper.
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Old 04-08-2021, 05:48 PM   #4
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Inverter option looks good but you may want to opt for more watts. Just talked to Grand Design today about this. They outfit trailers with 3000w when there is a res. Fridge on the build. Another thing to consider .. what’s your battery situation? The one that came with the trailer is most likely not spec’d for that draw
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Old 04-08-2021, 06:08 PM   #5
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I thought about a bigger one but the only time it will be in use will be driving down the road and just running the refrigerator. Just sometimes on a vacation we may drive 3-4 hours then stop for lunch then drive another 3 hours or so and the wife is worried about things warming up. I plan on having a second battery just to run the inverter.
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Old 04-08-2021, 07:18 PM   #6
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I've thought of installing one for years, but have never pulled the trigger.
Can you download the install manual? That would sure help if a guy could study that before ordering. It looks like what I would get if and when.
If you do this I would like to follow your install steps.
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Old 04-08-2021, 07:56 PM   #7
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I found the manual here:https://www.aimscorp.net/1000_Watt_P...r_12_Volt.html. Still thinking about it but if i go that route i sure will post the install.

The used/new to me camper will not be delivered for another 2-3 weeks just trying to get ahead of the curve.
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Old 04-09-2021, 04:58 PM   #8
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Running a residential fridge on batteries using an inverter you will need a
at least 2-3 biiiig batteries. Those batteries need to have the highest possible
voltage. Most inverters have a low voltage cut off like 10.8 volt or so.

Better get a RV fridge with Gas and electric.

Greetings, Harold

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Originally Posted by dagst1 View Post
I found the manual here:https://www.aimscorp.net/1000_Watt_P...r_12_Volt.html. Still thinking about it but if i go that route i sure will post the install.

The used/new to me camper will not be delivered for another 2-3 weeks just trying to get ahead of the curve.
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Old 04-09-2021, 07:04 PM   #9
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Here's an article that may help you.

https://vehq.com/rv-inverter/
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Old 04-09-2021, 07:29 PM   #10
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Thanks Mark i will check that out. My main goal is to run the refrigerator while traveling during the day. Eventually it will be replaced by a rv refrigerator -- maybe --probably. The wife and i are still discussing it.
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Old 04-09-2021, 07:41 PM   #11
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If you don't do any boon docking, I think you might like that residential fridge more than you realize now.


When do we get a peek at what you have for a new to you SOB?
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Old 04-09-2021, 08:37 PM   #12
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After 40 years of marriage I know enough to know she will make up my mind. If mama is not happy As for the new to us camper it is a Crossroads product. When we get it i will start a thread about it. Now it is 4 states away and delivery should be the end of the month.
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Old 04-11-2021, 09:13 PM   #13
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Ok after some more searching i may have it figured out.

1 Disconnect wire from power center that feeds the refrigerator plug.
2 Run wiring from breaker to the inverter in.
3 Run wiring from inverter out back to power center area.
4 Install junction box and join wiring from inverter to wiring to outlet.
5 Run + and - from battery to inverter.

I plan on adding a second battery but the question now is --- The inverter has a built in battery charger and the Converter also has a charger. So when i plug into shore power the CONVERTER and the INVERTER both will be trying to charge the battery. I believe i would be ok if i just turn off the inverter.

Any thoughts would be greatly appreciated.
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Old 04-11-2021, 10:23 PM   #14
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what kind of inverter? You really only want one charger.
And on most inverters the charging can be disabled.
But if its a good inverter you might want to plan a different way of running your power system.

Some inverters will have built in transfer switching and will help out if you run into poor power levels. like having to plug into a 15A plug at home.

Sorry just saw it is AIMS.... And I think that is just an inverter, no charger.
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Old 04-14-2021, 07:46 PM   #15
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The one i am looking at is a AIMS power PIC100012120S - Pure sine wave 1000 watts continuous 2000 watts surge 25 or 55 amp selectable battery charger with built in transfer switch.

This brings up a couple questions. Can i replace my converter separate from the power center with the inverter or use them both just turn one of the chargers off.

Again this is only to run the residential refrigerator as we travel. Not for dry camping.

Also if someone has a different brand inverter that you have had good luck with i am open to suggestions or recommendations.
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Old 04-14-2021, 09:57 PM   #16
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I run a victron. But I mainly dry camp or boondock. Now if that inverter has a better charger than the factory installed one. (Most likely does). I would do some tease arch and see if it has adjustable or programmable charge profiles.
Then it is definitely better than the factory. At which point I would just disconnect the factory.
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Old 04-15-2021, 02:21 PM   #17
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Quote:
Originally Posted by dagst1 View Post
I thought about a bigger one but the only time it will be in use will be driving down the road and just running the refrigerator. Just sometimes on a vacation we may drive 3-4 hours then stop for lunch then drive another 3 hours or so and the wife is worried about things warming up. I plan on having a second battery just to run the inverter.
You may need to check wire size.
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Old 04-15-2021, 02:55 PM   #18
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Quote:
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You may need to check wire size.
Bob is correct. If the fridge uses 700 Watts with 120 VAC, that's about 6 amps. No problem for a 120 VAC circuit. But to produce 700 Watts from a 12 VDC source, that would require 58 amps. There is no way your TV's trailer 7-pin could produce that much power to charge the battery, while the fridge is drawing from the inverter. This is why you'd need a very large bank of batteries, and they would discharge far faster than they were being charged during you travels and stops.
People have tried to supplement their residential fridges with dry ice (and not opening the door) during travel. My recommendation is to yank out the residential fridge, and get the RV type you need and want for parks and boondocking.
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Old 04-15-2021, 02:59 PM   #19
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Wire size on the truck to help keep the batteries charged?
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Old 04-15-2021, 03:24 PM   #20
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I would love to but the dealer says that they are on backorder. All that are being produced goes to the manufactures first. Just trying to get by untill i can get the rv one - unless the wife likes the residential one.
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