Question about Kohler 12 kW Emergency Power System - 12RES-L

1 Answer

12RES alternator Conflicting messages. Does my 12RES have an alternator to keep the starter battery charged? Or am I totally dependent on the mini-solar panel for this?

Posted by john crawford on


1 Answer

Leigh Perlmutter

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,669 Answers

There MUST be a generator attached to the engine of your genset to recharge the battery as starting current greatly reduces the charge of the battery. The solar panel was designed to "trickle" the battery to keep the battery "fresh".

Posted on Dec 26, 2012


Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Why does my altenator get so warm and charg at 11.55

I would take your alternator to an auto parts store that does free alternator testing. That will give you a definitive answer if you should replace or keep looking for an electrical problem.

Jul 25, 2014 | 2000 Isuzu Trooper

1 Answer

New battery new alternator new starter and car still wont keep charge

Bad cable or voltage regulator. Depending on the year could be the ECM engine control module.

Aug 24, 2013 | 2000 Oldsmobile Alero

1 Answer

Kohler 12 RES - Unit fails to start occasionally. Attempting a manual start by placing switch in run position, cause a loud click, but no cranking. The panel says CC. This morning I put a jump start...

I finally solved the intermittant starting problem on my Kohler 12 RES by replacing the strater and the starter relay. I was also experiencing the occassional OC indication, red blinking LEDs on the ATS, and intermittent non-starts during the weekly exercises. The problem happened during power outages a couple times also. If I flipped the start switch between auto and run quickly the generator would occasionally start. Once started, the generator runs fine. I ordered a new starter, which included the starter solenoid. By the way, don't worry about the genuine part thing..the old starter was a Delco made overseas. I ordered a new starter online for $85 (6744N) and it was indentical to the genuine Kohler starter. Replaced the starter and it improved the problem but did not totally solve the intermittent starting. Ordered the starter relay (GM49746) replaced it and the problem is solved.

May 09, 2012 | Kohler 12 kW Emergency Power System -...

1 Answer


First you need to find out where the problem is! Basically, you divide it up to three categories. Charging/starter; fuel system and engine. You need to start with the charging/starter category. Even if the engine turns over when you are trying to start the car suggest you try a jump start. If it won't start when you are jump starting it, then it probably isn't the battery or alternator but still could be the starter. If it DOES start, then the problem is either you battery or alternator or cables.
Depending on what your indications are depends on what you need to do to narrow down the problem.

Dec 31, 2011 | Cars & Trucks

2 Answers

I have a 1997 Ford taurus GL. Decided not to start a few days ago so bought a new battery. Ran okay for a couple of days then wouldn't start, but did so with a jump. Now jumping it does nothing and...

It's the is not keeping your battery charged. You can remove it and take it to a local parts store and they will test it for free.

Jul 08, 2011 | Ford Taurus Cars & Trucks

1 Answer

My 1999 mitsubishi diamante will not start. I got a friend to jump it but it still would not start. I took the battery out and took it to autozone to charge it. But autozone would not charge it because...

It sounds like you need a new starter. If you hear the starter click when you turn the key to start, replace your starter since you already replaced the battery. You might want to have your alternator checked out, or when you get your car started, test the battery terminals with a multimeter. You should have around 14 volts with the car running. If not, you will need a new alternator. The alternator won't keep the car from starting though, unless the battery was drained because it wasn't charged. Even then it is the battery keeping the car from starting.

If the starter is not clicking, check your fuses under the hood. If all checks out, you may have a bad ignition switch.

I’m happy to help further over the phone at

Jul 02, 2011 | 1999 Mitsubishi Diamante

1 Answer

Hi im having problem to start my 2005 escape,when im having problem and i turn the key the only thing it does is a tic tic tic tic and when i boost it, it will start no problem and could be having no...

Well, it could be the alternator or the starter, but I would definitely try to check the connections at the battery to make sure that when they are removed they look shiny and clean at the contact points.

If the battery is charged up, it should have enough power to turn any starter on the market that is in good condition.

To determine what is bad, I would take it to a battery retailer like Sears or Walmart and have them actually test the battery/starter/charging system with their computerized device.

That way, you can get to the bottom of things within minutes.

A good starter should draw 75 to 110 amps and turn the starter vigorously.
If the starter draws only 1 or 2 amps and doesn't turn, the solenoid is bad, but a new starter is indicated.

If the battery is charged up, then it's not the alternator. However, remember this, that batteries only last 3 years on the average as I learned at Sears Roebuck & Co. as a battery replacement technician. So, if your battery is older than that, then it should be replaced for dependability.

Good luck on this repair.

Oct 17, 2010 | 2005 Ford Escape

1 Answer

Location of battery charge problems

The alternator, for producing 120/240vac, is located at the other end of the engine. The alternator for charging the battery is part of the AC alternator.

Charging circuit breaker? Don't know that one, I thought they were fused near where the battery was installed.

Apr 13, 2010 | Kohler 12 kW Emergency Power System -...

3 Answers

Starter battery will not charge

If the starter battery is not taking a charge, then it may have failed and require replacement. It is not uncommon for a battery that sits on standby for long periods of time to eventual fail. Best approach is to contact Kohler direct or one of their service agencies to get the correct replacement battery for the generator system.
You can contact them here
regards robotek

Apr 13, 2010 | Kohler 12 kW Emergency Power System -...

2 Answers

Possible Alternator

have battery and charging system checked. you may have a bad starter.hope this helps.

Oct 14, 2009 | 1997 Buick LeSabre

Not finding what you are looking for?
Kohler 12 kW Emergency Power System - 12RES-L Logo

150 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kohler Electrical Supplies Experts

Sheldon Dedek

Level 3 Expert

912 Answers

Tim Venetis

Level 2 Expert

260 Answers


Level 3 Expert

85239 Answers

Are you a Kohler Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides