2000w inverter, not a pure sine wave but modified square wave works fine for powering tungsten bulbs, and I am able to power up to 650w lamps but anything higher than that the inverter will start beeping and then say "EOC" message which means error overcurrent.
My 12v battery read 12.2 volts, which it should be 12.6 and above, so that could be why i would get that EOC message.
because I'm pulling more current because the voltage remains roughly the same, voltage x amps= watts?
I'd say they are "fudging" the specs! Incandescent lamps do draw additional current when cold, but I would expect the inverter to handle that.That shouldn't be a big problem. The battery is only "fully charged" for a very short time and as it discharges the voltage will drop. Ideally, the voltage would remain constant until the battery dies (like a gas tank running out of gas) and real batteries try to maintain fairly-constant voltage over most of the charge-life, but they are not perfect.And, a good boost converter (or inverter) should work with reduced voltage so it should extract the most from the battery.It's probably something like 90% efficient so with the 650W lamp you could be pulling something more than 700W from the battery. That would be about 60 Amps on the battery-side.
Measure the voltage right on the inverter terminals when running the lamp.650W is at least 54 amps, and will be a bit higher on account of the Inverters efficiency.Some of the cheaper inverters shut down on low input volts, at around 11V .
Hi,What are you using for leads from the battery to the inverter?What is your battery?Have you monitored the battery voltage as you load up the inverter?Thanks.. Tom..
If you have any welder cable that should work better than your car battery cables.lugs
It's probably something like 90% efficient so with the 650W lamp you could be pulling something more than 700W from the battery. That would be about 60 Amps on the battery-side.
650W of quartz halogen will pull about 5kW initially when the filaments are cold, if you can sequencethe lamps switch-on you may be able to get more from the inverter if its cutting out due toswitch-on surge.
This is the right way to do the calculation.Consider what happens as the battery voltage drops: the output power is constant so the inverter must draw more current because of the lower voltage. Eventually it will draw more current than the inverter's input stage can handle. So even though the battery is not flat and the output is not overloaded, the input has reached its limit and it must shut down.That is why it is difficult to place just one power figure on the label: the actual capacity varies depending on the characteristics of the supply and the load.
You can sequence the halogen loads using contactors rated for the load current. Make a panel with toggle switches on it to switch the contactor coils individually so you can sequence them. Run the halogen currentthrough contactor contacts. This way you can bring up 10 halogens individually, so you won't overload the inverter.
I'm trying to visualize what you are explaining but still don't understand?
and I am able to power up to 650w lamps but anything higher than that the inverter will start beeping and then say "EOC" message which means error overcurrent.