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Utilities & SystemsA power converter utilizes 120-volt AC power and transforms this energy into 12-volt DCpower, which is used inside of your trailer. 12-volt DC energy supplies power to all interiorlights and various appliances. The floor plan, and size of the trailer dictates the model andoutput size of the power converter required.An auxiliary battery as correctly installed will be charged when the trailer is connected to120-volt AC power. (See the following information on the auxiliary battery.) Theconverter will supply power through the fuse panel located near by, possibly in the samecompartment.Refer to the manufacturer’s information supplied with your trailer and/or consult with yourindependent, authorized dealer to answer questions you may have. Information can also befound at the manufacturer’s website at www.iotaengineering.com.Auxiliary Battery (Independent, Authorized Dealer Installed Option)All trailers are designed and built to accept an auxiliary battery. A deep cycle marine typeis recommended as you need longer energy rather than cold cranking power. A battery isrequired to operate the breakaway switch and also provides a source of energy whentraveling and camping.All battery packages require an “in-line” fuse and holder attached to the battery for circuitprotection. Consult with an independent, authorized dealer for correct installation of theauxiliary battery.Maintenance on a battery is required for longer life. First, all terminals need to be keptclean and free of corrosion. Second, a battery that is used daily and charged frequently bythe power converter will consume water. Keep the battery filled as the cells cannot hold acharge when the water is low. A deep cycle battery is NOT maintenance free. Additionalguidance for proper battery maintenance may be obtained from your independent,authorized dealer.In normal conditions a converter will not overcharge a battery unless (a) the battery has lowor dead cell(s), or (b) the converter has a malfunction. The charging module on someconverters have a positive shut-off and on others there is a reduced charge rate to a very lowamperage.A fully charged battery will read 12.7-volts DC and 1.265 specific gravity at 80°F (32°C).A battery is considered discharged at 11.8-volts DC. If the voltage drops below theselevels, permanent damage will occur.The RV battery is installed in parallel circuitry with the battery on your tow vehicle. Bothbatteries supply power to your RV, so it is important not to discharge the tow vehiclebattery below the level of power required to start the engine. To prevent this occurrencewhile parked, disconnect the wiring harness between the RV and tow vehicle or install abattery isolator (see below). When the tow vehicle’s engine is operating with the RVconnected, the vehicle’s charging system will charge both the vehicle battery and theauxiliary battery.68 Jay Flight Conventional Travel Trailer and Fifth-Wheel Travel Trailer