[DeTomaso] NPC - Amp Conversion for power inverter

[Tomas Gunnarsson]

If you disconect the battery with the engine running the electron flow will continue as if nothing happened until the engine is turned off. The battery is merely a buffer and can't produce energy. With mechanical work input the alternator produces energy. Every electron you draw from the battery has to be produced by the alternator.

Example: Lets say we have a fully charged 100 Ah battery and a 100 A alternator in the car. We start the car and let the alternator charge the battery to compensate for the starting procedure. Let's assume that the car uses nothing for its own loads for now.

Rob hooks up his inverter and starts pulling 100 A. What's the situation like after 1 h? If all is well the battery is fully charged and the alternator will have put out 100 Ah.

Tomas

----- Original Message ----- 
From: "Larry - Ohio Time" <Larry at ohiotimecorp.com>
To: "'Tomas Gunnarsson'" <guson at home.se>; "'DeTomaso Mail List'" <DeTomaso at poca.com>
Sent: Saturday, October 18, 2014 10:12 PM
Subject: RE: [DeTomaso] NPC - Amp Conversion for power inverter


> Well ya kinda sorta. If you could look at the electrons you could see if
> they were coming from the battery or the alt, but them buggers are very
> small. I have always used this point of view. If you stop the Alt from
> charging (stop motor) the electron flow continues (for a wile).  If you
> disconnect the battery all flow stops.
> 
> Larry - Cleveland
> 
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Tomas
> Gunnarsson
> Sent: Saturday, October 18, 2014 3:50 PM
> To: 'DeTomaso Mail List'
> Subject: Re: [DeTomaso] NPC - Amp Conversion for power inverter
> 
> This is not entirely true. The alternator will try to keep the battery
> voltage at 13.8 V (or something close to that). When you start discharging
> the battery its voltage will drop and the alternator will take over the load
> gradually. Eventually all the current will come from the alternator and none
> from the battery.
> 
> Tomas
> 
> ----- Original Message ----- 
> From: "Larry - Ohio Time" <Larry at ohiotimecorp.com>
> To: "'Rob Dumoulin'" <rob at dumoulins.net>; "'DeTomaso Mail List'"
> <DeTomaso at poca.com>
> Sent: Saturday, October 18, 2014 9:18 PM
> Subject: Re: [DeTomaso] NPC - Amp Conversion for power inverter
> 
> 
>> Hi Rob,
>> 
>> You will not damage the alt as you are pulling the 100 amps from the
>> battery. Your Alt is only recharging the battery. You are taking more
> power
>> then you are replacing. You will drain the battery at some point and then
>> you could run into a problem with the Alt.
>> 
>> So I think it comes down to how long the motor will be running.
>> 
>> 
>> Also remember:
>> 
>> A motor start up draws more power.
>> The inverter its self is not 100% efficient and will use power.
>> I have some generators for sale : )
>> 
>> 
>> Larry - Cleveland
>> 
>> 
>> -----Original Message-----
>> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Rob
> Dumoulin
>> Sent: Saturday, October 18, 2014 2:33 PM
>> To: DeTomaso Mail List
>> Subject: [DeTomaso] NPC - Amp Conversion for power inverter
>> 
>> Gurus,
>> 
>> I've got a John Deere 4 cylinder Diesel motor with a 70 amp alternator.
> The
>> battery is rated at 950 CCA.
>> 
>> I want to hook up a 1500 Watt continuous power inverter to run at most a
>> 10.5 Amp motor that pulls 1100 Watts.  That means I'll be pulling over 100
>> Amps.  Assuming I hook the inverter to the battery and run the Diesel
>> engine when I need the high-power appliance, will I fry my alternator?
>> 
>> Rob DuMoulin
>> 904.476.8744
>> rob at dumoulins.net
>> 
>> 
>> _______________________________________________
>> 
>> Detomaso Forum Managed by POCA
>> 
>> DeTomaso mailing list
>> DeTomaso at poca.com
>> http://poca.com/mailman/listinfo/detomaso_poca.com
> 
> _______________________________________________
> 
> Detomaso Forum Managed by POCA
> 
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
>