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All FAQs » Amateur Radio » 6.5 Mobil Operating » 15916

AC Power From Your Car - One Example (#15916)
One of dslr's members upgraded the power system in his car and was kind enough to share his installation. This is an excellent example of how to provide substantial AC power from your vehicle.

The list of requirements he developed included:
    • A separate, independent battery isolated from the main power system which could be depleted without stranding the vehicle.

    • A trunk mounted inverter with more power than the 150 watt rated unit that was originally installed.

    • A separate method of charging the independent battery which, while on 120 volt power would be capable of powering all of the 12 volt DC loads while connected to shore power or a generator.

A framework was designed and constructed from 11 gauge ¾ inch angle iron to which two backboards were mounted. These in turn served as mounts for two radios and a lower frame to hold a 27 series battery.

Under the hood an upgraded 200 amp alternator was installed - not so much for the total output but because is was capable of providing considerably more amperage with the engine at idle. Wiring from the alternator to the distribution block was upgraded with a #2 copper lead and a 200 amp fuse at the alternator to protect it from an output short. The feed to the trunk was upgraded to #6 copper.



Under the Hood




Feed from Alternator to Distributor



Fuse Protection


In the trunk an East Penn/Deka 92 Ah AGM battery was installed, to which two copper buss bars were connected allowing for an easy and safe way of connecting radio equipment or other future needs.



Independent Battery and Copper Buss Bars


Each load and or feed wired to the buss bar has its own in-line fuse allowing which prevents failure of one from affecting the others.

A Xantrex Freedom 458 1Kw inverter and 50 amp charger was selected for the inverter/charger.



Xantrex Freedom Inverter/Charger


This unit came from a flea market. 1 Kw might be considered overkill but this unit has load sensing which enables it to idle at a low amperage rate until a load is applied. It also has a nice clean output and the 50 amp regulated output will support several radios even without a battery.



AC Distribution



Radio Power


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This system designed and installed by Splitpair See Profile
See: »A Mobile/Vehicle Power System

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by KeysCapt See Profile


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