270 amp Alternator, 3000w Power Inverter, Heated Seat Mod/Instllation - Second Generation Nissan Xterra Forums (2005+)
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post #1 of 13 (permalink) Old 03-21-2019, 09:24 AM Thread Starter
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270 amp Alternator, 3000w Power Inverter, Heated Seat Mod/Instllation

Alternator upgrade
Alternator: Mechman alternator 270 AMP 11256270
Belt: Dayco 5070862
M10 X 1.25 X 120mm bolt
This bolt is for upper bracket bolt. Mechman told me that the alternator stay is exactly same as OEM alternator. However, it is lie. OEM upper bolt is M10 X 1.25 X 110mm. This bolt is little bit short for the mechman alternator. So needed 120mm instead. Other than that, not require any modification at all. Even plug is 3 pins, not 2 pins like DC power.

8 foot for red and black 1/0 welding cable
I upgraded wires to 1/0 welding cable. Alternator to positive battery, ground negative engine block to negative battery, and ground engine to frame. Additionally, added ground alternator to frame too.
Hall sensor upgrade was pain, but not too bad. I used grease to let 1/0 cable pass through it, but needed patients a lot!

This alternator works fantastic now. When battery is low, it raises up voltage around 14.6 – 14.9. Indeed, the temp affects the voltage, but it never be over 15V. I live in north side of US.
When it is fully charged, it will go down around 13.2 when the car is stop. This alternator charges up very quick although I do not have much accessories now. The reason I upgrade the alternator was that I wanted to use power tools and air compressor like mobile work truck.
I tested 600W small heater for 10 minutes. The voltage did not change much like 0.2 V up and RPM slightly went up also like 750 RPM instead of 675 RPM. Hair dryer also worked too although I and my girlfriend will not use it… just tested how it works.

Thanks for Ghostmode for this
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Last edited by gtitonta; 03-26-2019 at 05:46 AM.
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post #2 of 13 (permalink) Old 03-21-2019, 09:26 AM Thread Starter
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more pic
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post #3 of 13 (permalink) Old 03-21-2019, 09:26 AM Thread Starter
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Power inverter mod
Xantrex prowatt SW 2000 (up to 3000W) it is pure sine converter
15 foot red and black 1/0 welding cable (passthrough from passenger side firewall.)
It was not that bad also. I used metal hanger and pass through firewall from engine bay to inside first (I used grease before did this). Then, hook cable and fished it. it took me 1 hour for one cable. I asked my girlfriend to help where the tip of hanger comes from inside of passenger side. It took us just 15 mins. Lol……. So, I recommend do this way. Much faster!

Blue sea 7149 200 amp circuit breaker: continuous 200 amp and temporally up to 150 % for minute
This circuit breaker function as breaker, but also manually completely turn off power inverter. So you don’t need worry about killing battery overnight.
It is better option to buy circuit breaker and 200 amp continuous duty relay, but it cost more than double. This breaker costs me just $30. If I want buy reliable circuit breaker and relay costs me $80-100.

Digikey number: Q891-ND

Remote controller for the power inverter: Xantrex technology 808-9001
I installed this at the side of driver side console. So I can turn on converter by the switch. It is convenient since the power inverter is cargo area.

I don’t have this, but I might get this
Xantrex Prowatt SW auto transfer switch (8080915) :
Automatically toggles between AC power from the PROwatt SW inverter and AC power from another AC source such as utility or shore power to transfer to a single AC output such as a qualified load via a branch circuit
3 prong extension cord

Thanks for Surf and Snow and NUTSgoWEEE
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post #4 of 13 (permalink) Old 03-21-2019, 09:28 AM Thread Starter
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remote controller for Xantrex
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post #5 of 13 (permalink) Old 03-21-2019, 09:30 AM Thread Starter
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Heated seat installation:
https://www.thenewx.org/forum/15-how...ted-seats.html

Thanks for CroftonBilly
Currently I am using Exide 27 dual purpose marine battery.
• 575 cold cranking amps at 0-degree F
• 730 cranking amps or marine cranking amps at 32-degree F
• 160 minutes reserve capacity at 25-amp
• 100-amp at 20 hour (100 Ah) - reference rating

It is just $89 at homedepot now
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post #6 of 13 (permalink) Old 03-25-2019, 08:46 AM
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Electrical is the most intimidating system on a vehicle to me. Thanks for sharing this. Did they mention if the alternator is water proof?


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post #7 of 13 (permalink) Old 03-25-2019, 10:39 AM
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I checked their site but can't find any results with that part number. Got a link to it? They have a 240amp listed.


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post #8 of 13 (permalink) Old 03-26-2019, 05:26 AM Thread Starter
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@kebler2005;

Mechman website does not mention regarding to waterproof. However, I read so many thread about mechman alternator. It seems not waterproof like the alternator from DCpower, but mechman alternator is similar water proof like OEM.
@IssacHunter;

This model is discontinued, but you can still get the alternator from another website.

https://droppinhzcaraudio.com/altern...ssan-infinity/

Last edited by gtitonta; 04-03-2019 at 06:28 PM.
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post #9 of 13 (permalink) Old 05-06-2019, 10:27 AM
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Awesome write-up! Thanks for sharing! this will be a good item for an overland Xterra.
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post #10 of 13 (permalink) Old 05-08-2019, 08:38 PM
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I just ordered a 270amp alternator. Let me know how you like yours- mine's for air compressors, lights, tools etc though, not much stereo.
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