electricman
recently i install a 17000 gas generator whithout the ats(atomatic transfer switch) and is running great.but a few weeks later after two weekley test the display shows a battery weak signal.the mannual said that there is a built in charger.i am wondering if is in the ats,which i did not use.may i just put an external charger connected to the battery terminals.
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Skip Douglas SkipD
electricman;7418 wrote:
recently i install a 17000 gas generator whithout the ats(atomatic transfer switch) and is running great.but a few weeks later after two weekley test the display shows a battery weak signal.the mannual said that there is a built in charger.i am wondering if is in the ats,which i did not use.may i just put an external charger connected to the battery terminals.
The charger in your generator does not function if the generator is not running. It takes time to recharge a battery, and you probably have not run the generator long enough to recharge your battery. I've read that some folks have had problems getting a battery to charge with the built-in charging circuit.

I strongly recommend that you use a commercial battery maintainer and keep it connected the battery 24/7. Many folks here use the [url=http://batterytender.com/waterproof-800-usa-western-hemisphere.html][COLOR="Blue"][U]Battery Tender 800[/U][/COLOR][/url]. I use the [URL="http://www.batterychargers.com/ProductDetail.aspx?ProductName=94026717"][COLOR=blue][U]Schumacher SEM-1562A battery maintainer[/U][/COLOR][/URL] to keep my camper's battery up to snuff all the time and I also use a [URL="http://www.batterychargers.com/ProductDetail.aspx?ProductName=94026501A"][COLOR=blue][U]Schumacher SE-1-12S[/U][/COLOR][/URL] in my Generac standby generator to keep its battery charged all the time.
Skip Douglas
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electricman
hey Skip i need your help again i did what you recomend i brougth the schumacher SE-1-12S and conected to the battery terminals together with the generator terminals and after a few weeks the battery dies and it was new. WHAT I DID WRONG? help me.thank you
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hoghead
How do u have generator wired and what is the model number
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Canada_Guy
Do you have a good voltmeter? You could attach the Schumacher charger only to the battery (with the generator disconnected). Check the battery voltage and then re-check it after 24 hours. It should be around 13.0 to 13.2 volts. If it is, that indicates that the charger is working, and assuming the battery is good, that the battery is charged.

Next you could attach the negative lead of the generator to the battery. Then connect a DC ammeter between the battery + terminal and the generator positive battery lead. Set your ammeter at 10 amps. You should see no current flowing. If there is current, it would indicate the generator has some drain that may be draining your battery.

(Note, if you see no current drain, I would take it a step further and add a known drain like a 12-volt light bulb to confirm that your ammeter is working. Often the fuse in the ammeter gets blown and it never shows current drain)
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ohmslaw
You can also connect a 12v test light between the neg cable and the neg terminal post. A glowing bulb indicates current flow and therefore a drain.
Tim
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electricman
i didnt use the ATS i just connected the output(lines) to a manual transfer switch and the terminals of the charger to the battery together with generator terminals.model 17000watts generac guardian series model #5874
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hoghead
electricman;7754 wrote:
i didnt use the ATS i just connected the output(lines) to a manual transfer switch and the terminals of the charger to the battery together with generator terminals.model 17000watts generac guardian series model #5874


The battery charger will only be on when the generator is running if you wired the charger to the output terminals.
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WB5CCO
If the Off/On/Start switch on the generator is left in the On (center) position, there is current drain which will eventually drain the battery unless an external charger is attached and operating.
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