Eliminator MotoMaster 3000 watt modified sine wave digital inverter not producing enough power

can you elaborate on "act upon your finding". After doing 30 min of google youtube research I have a vague understanding on what true RMS voltage is and why modified sine wave may not produce the indicated voltage. I am not sure if I have the right equipment to measure true RMS voltage so lets just assume that it produces a lower voltage so what are my options after that then? get a new inverter? can you elaborate on "act upon your finding". After doing 30 min of google youtube research I have a vague understanding on what true RMS voltage is and why modified sine wave may not produce the indicated voltage. I am not sure if I have the right equipment to measure true RMS voltage so lets just assume that it produces a lower voltage so what are my options after that then? get a new inverter?

If the output voltage is too low, RMS is ideal but a standard multimeter will give a good idea, and the battery voltage is around 12.6volts, the invertor is under powered or faulty. If the battery voltage is low, the output may be low because of that. The lower the battery voltage, on load, the more currect the inverter will draw to try and produce the required power output. If the output voltage is too low, RMS is ideal but a standard multimeter will give a good idea, and the battery voltage is around 12.6volts, the invertor is under powered or faulty. If the battery voltage is low, the output may be low because of that. The lower the battery voltage, on load, the more currect the inverter will draw to try and produce the required power output.

ok the inverter is producing 12.6 volt so that means i need to connect more batteries in series to increase input voltage? I thought there is a limitation on how much volt you are suppose to provide as input? do I connect the batteries in series instead?

I have some basic understanding in physics but I have no idea what the specification and standards on how the set up works. If I connected the batteries in series then wouldn't the voltage be doubled as input into the inverter? But I am pretty sure there is only a small window for desired input voltage as specified on the manual. If I connect the batteries in parallel i would be increasing the current and therefore increase the input power right? ok the inverter is producing 12.6 volt so that means i need to connect more batteries in series to increase input voltage? I thought there is a limitation on how much volt you are suppose to provide as input? do I connect the batteries in series instead? I have some basic understanding in physics but I have no idea what the specification and standards on how the set up works. If I connected the batteries in series then wouldn't the voltage be doubled as input into the inverter? But I am pretty sure there is only a small window for desired input voltage as specified on the manual. If I connect the batteries in parallel i would be increasing the current and therefore increase the input power right?

Do you mean the battery voltage is 12.6 volts when the inverter is running? Do you mean the battery voltage is 12.6 volts when the inverter is running?

It is a 12volt 3kW inverter that is rated at 12volts input and an output of 120volts. Never increase the input voltage to more than the rated voltage of 12volt lead acid; 13,6volts fully charged. It is a 12volt 3kW inverter that is rated at 12volts input and an output of 120volts. Never increase the input voltage to more than the rated voltage of 12volt lead acid; 13,6volts fully charged.

I will reitterate; if the battery voltage is 12.6volts when the inverter is running, go no higher. The output voltage should be 120volts +-10%. I will reitterate; if the battery voltage is 12.6volts when the inverter is running, go no higher. The output voltage should be 120volts +-10%.

yes you are right the battery voltage input is 12.6v- 12.5v as indicated on the invertor. For a sec I thought it was the output voltage. I don't know how to measure the output voltage. Do I just stick the voltmeter in the output socket? and yes I understand that I should not be connecting the batteries in series. so lets assume the output voltage is lower than what I needed then what are my options? yes you are right the battery voltage input is 12.6v- 12.5v as indicated on the invertor. For a sec I thought it was the output voltage. I don't know how to measure the output voltage. Do I just stick the voltmeter in the output socket? and yes I understand that I should not be connecting the batteries in series. so lets assume the output voltage is lower than what I needed then what are my options?

If the output voltage is not as described on the specification label for the inverter, time for one that works.
To measure the output voltage, a good place to start is use a light bulb and your appliance that is not working properly with a two way adaptor. Plug them both in and the light should be at full strength, when you switch the appliance on, if the light dims/goes out and the appliance draws less power than the specified loading of your invertor, then the invertor is probably faulty. If the output voltage is not as described on the specification label for the inverter, time for one that works. To measure the output voltage, a good place to start is use a light bulb and your appliance that is not working properly with a two way adaptor. Plug them both in and the light should be at full strength, when you switch the appliance on, if the light dims/goes out and the appliance draws less power than the specified loading of your invertor, then the invertor is probably faulty.