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Old 04-30-2018, 06:30 PM   #1
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1972 25' Tradewind
KEMP , Texas
Join Date: Apr 2018
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Just inherited a 72 land yacht. My question: will be parked for living quarters at rv park. Is it ok just to run off 120 without using battery and univolt?
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Old 04-30-2018, 07:16 PM   #2
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1986 34' Limited
1975 27' Overlander
Conifer , Colorado
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Welcome to Air Forums: Your trailer was designed to run off of 12v. All the lights, fans, furnace, water heater, water pump and the like need 12v to operate. The 115v AC powers the outlets and the air conditioner. The fridge will also run on 115v AC but won't run without 12v and propane if the power is disconnected. 115v AC also powers the converter which then powers the 12v system as well as keeps the battery charged up.

Your trailer is designed to use 30 amps of 115v AC power. That is about 3000 watts of power. The AC may draw 1800 watts of that power on a hot day. You really can't run an electric hair dryer or microwave at the same time as the air conditioner.

You also need a good propane system and good propane appliances like the furnace, stove, oven and water heater. It's an old trailer, make sure the appliances are in good operating order. Many times the igniters on these appliances are powered with 12v.

It is certainly possible to run the trailer on 115vAC without a 12v battery. But you need the 12v converter so the 12v systems can work. I might add the battery acts like a "accumulator tank" to help reduce 12v voltage ripple. You can't tow the trailer without a good 12v battery to run the emergency brake system. You would be wise to have both a working converter and battery while using the trailer in a trailer park.

I hope others will provide more information.

David
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Old 04-30-2018, 07:31 PM   #3
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1972 25' Tradewind
KEMP , Texas
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Thank you so much for the information!
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Old 04-30-2018, 07:58 PM   #4
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Byron Center , Michigan
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David nailed it. You can run without a battery when left stationary/long term, as long as your converter is working and making 12v for everything. Iíd suggest wrapping the battery cables with electrical tape to make sure they donít ground out as the converter will still be trying to charge the battery via those cables (electrically hot).
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Old 04-30-2018, 08:02 PM   #5
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2012 27' Flying Cloud
W , New England
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You got the answers to your specific questions - I'd just like add condolences for whoever it was who passed for you to become the owner of this beauty - that is quite a gift! The only other thing I'd add is that with all you were told about what it was designed for - it was ultimately designed for road trips so hopefully you can enjoy that side of things too.

Welcome and all the best!
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