5000 watt 120V generator to charge 10 12V Automotive batteries

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Discussion Overview

The discussion revolves around the feasibility of using a 5000 watt 120V AC generator to charge 10 12V automotive batteries, with considerations for the type of batteries, charging requirements, and potential configurations for an electric car project.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • The original poster (OP) inquires whether a 5000 watt generator can charge 10 12V batteries and asks about the appropriate motor size for their electric car project.
  • One participant requests the Ampere-Hour (AH) rating of the batteries, suggesting it is crucial for determining charging needs.
  • The OP specifies the batteries have a rating of 55 AH.
  • Another participant calculates that approximately 6.875 Amperes would be needed to charge the batteries in about 8 hours.
  • There is a question regarding whether the generator is AC or DC, with the OP confirming it is AC.
  • One participant asserts that charging DC batteries with an AC generator requires a rectifier and possibly a transformer to adjust the voltage.
  • Another participant challenges the feasibility of using an AC generator directly with DC batteries, suggesting the use of a standard battery charger instead.
  • Concerns are raised about the compatibility of charging multiple batteries in parallel without closely matching them.
  • One participant expresses skepticism about the project's viability, suggesting that the outcome may resemble a golf cart unless significant resources and expertise are available.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of charging DC batteries with an AC generator, with some suggesting the use of a rectifier and others advocating for a standard battery charger. The discussion remains unresolved regarding the best approach to charging the batteries.

Contextual Notes

Participants have not fully resolved the implications of using an AC generator with DC batteries, including the necessary equipment and configurations for effective charging. There are also assumptions about the compatibility of the generator and batteries that remain unaddressed.

Who May Find This Useful

Individuals interested in electric vehicle projects, battery charging methods, and those exploring the use of generators for automotive applications may find this discussion relevant.

Xasio
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5000 watt 3600 rpm 120V generator to charge 10 12V Automotive batteries. Will this work? Less or more batteries?

Im wanting to put together an electric car. If i use the items above (which is what I have laying around) What size motor would best for longevity, speed ? HP? RPM? AMPs?
 
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What Ampere-Hour ratings are the batteries?
Its printed as XXX AH on the body.
 
Hi
55 AH
 
Ok. You need apporoximately 55/8 = 6.875 Amperes to charge the batteries in period of about 8 hrs.

What type is the generator AC/DC ?
 
The generator is AC
 
Xasio said:
The generator is AC

Give it up! Those sound like DC batteries.
 
Its possible to charge those batteries with that generator. But You would need rectifier to convert it to DC and a Transformer to Convert into Required Voltage Level.
If the generator is a synchronous one with facility to varry field current, then you will only require a Simple Bridge rectifier, you can adjust the voltage by varrying field current.
 
Discord7 said:
Give it up! Those sound like DC batteries.

There's no such thing as a (simple) AC battery.

To the OP, if you have an AC generator, you can just plug in a regular battery charger. If you have lead-acid batteries (which it sounds like you do) you can go down to your local auto supply store and buy a wall-plug 12V lead acid battery charger.

Unless you can very closely match the batteries, they should be charged and used separately (and not in parallel).

For what it's worth, unless you have a great deal of money and/or expertise available, your most likely production is probably something like a golf cart.
 

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