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Old 02-19-2010, 09:36 PM   #1
Thom
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Over voltage 12volt system

looking for info from anyone who has had over voltage problems with an RS 3000 inverter, things to check or changes to make. I am seeing 14.2 volts at the light fixtures while on the generator.

Thom
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Old 02-19-2010, 11:10 PM   #2
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Thom, I don't think you have a problem. That looks like the high end of a normal output

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Old 02-20-2010, 01:29 PM   #3
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That was what I thought but I am going through a lot of 12 volt fixtures and water pumps. I have been told that it should be in the mid 13volt range. my system seems to only have the inverter no converter

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Old 02-20-2010, 11:12 PM   #4
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That is a touch high. You should be holding at 13.8 max. That is the max voltage my converter charges the batteries at. I think you might want to get the inverter checked.

Just a thought also. Does the voltage stay the same after the batteries are peaked or does it drop? How old are the batteries and what is their condition?
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Old 02-21-2010, 11:25 AM   #5
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converter voltage

Seems like I remember somewhere reading that CONverter can never fully charge a battery, they are designed to maintain a charge. Thats why a battery charger connected directly to the batteries will do a better job. The inverter is more like a battery charger than the converter is.
Or maybe I don't know what I am talking about.
Joe
I dont think the high reading is a problem.
Anyone else with an inverter checked the voltage output?
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Old 02-22-2010, 03:38 AM   #6
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RS3000 Charger Voltages

Thom,
Your 14.2 Volts is normal with the Charger portion of the RS3000 enabled and charging in Absorption mode to your flooded (wet) cell batteries. The 3-stage charger will Bulk charge at the current rate set in the SCP until battery voltages get up to around 13.5 Volts. At this point your batteries are about 75% charged.

The Charger will then switch to Absorption mode and continue to charge at full rate until the batteries attain 14.4Volts. At this point the voltage is held at the 14.4 Volts and the current reduces gradually as the battery comes to full charge (internal resistance rises). The Absorption Charge will continue until the current is reduced to a predetermined level or 6 hours passes. At this point your batteries are either fully charged or charged at the highest level that can be attained.

The Charger then switches to Float Mode and the charging voltage drops to 13.5V with a low trickle charge current rate. This is maintenance mode for a charged battery.

You are no doubt observing the voltage during the Absorption phase.

Wingnut is right that a Converter fixed at 13.8 Volts will never charge the batteries to their fully charged state.

The Inverter charger voltages are fixed and not user adjustable. This is a pity because they are lower than the U2200 battery calls for.

Your 12V devices should be able to withstand the voltages you are seeing with no problems. My Solar Controller is set for 14.8V and I have experienced no over voltage problem.

Hope this helps.
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Old 02-22-2010, 09:23 AM   #7
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charging

RodeWorthy,
Thank you for the very detailed account of how the inverter system works, wish I knew as much about it.
Very nice to know that all this information is available from our members.
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Old 02-23-2010, 11:19 PM   #8
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RodeWorthy
we are constantly watching the line voltage at a 12 v connection and seeing almost matching voltage to the battery, 14. 6 gets in there as well. we are taking the battery voltage from the tm500 but we did have a momentary 14.8 at generator start up this morning , still trying to understand
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Old 02-24-2010, 01:55 PM   #9
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Now I have the time to answer some of your questions

Motor 31
After peak the voltages stay up when the generator is running, with it off they drop off
Batteries are three years old and checked out very good

wingnut60
the RS 3000 has a three stage 100 amp charger built in

WE have both a DRV engineer and a Zantrax engineer trying to figure out what is going on with my system
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Old 02-24-2010, 03:15 PM   #10
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Thom
Do yourself a favor call John Palmer at the below listed number. He was on of the original inverterter delevopers agizillion years ago. He still has a shop in Lake City Fl. If he can't answer your questions or solve your problems,,,nobody can.

941-928-4573
http://www.palmerenergysystems.com/
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