SOURCE: Trace DR 2412 inverter won't run older front-loading washer
IF your washing machine is a conventional model with a common AC induction motor, waveform isn't the problem. Normal starting current for typical AC induction motors is usually 5 to 7 times the rated running current. Even though that current draw only lasts a fraction of a second, it's marginal for a 2.4 kw inverter's surge capacity. The trick of switching on other small loads (preferably resistive loads like incandescent bulbs) before starting the washer may help. Another area to check is your battery cables and connections The inverter pulls a huge amount of current to produce it's max surge output and even a little resistance in the battery circuit may cause the inverter to trip off. If you've got one of the fancy new electronic controlled washers with a D.C. motor, (so called energy saving or high efficiency models) then the waveform may be an issue and a pure sine wave might be needed.
SOURCE: The Sunforce 2500 pure sine wave inverter displays
Went to a free website with industry professionals sharing their knowledge instead of signing up for more ways to spend what little money I have.
SOURCE: my aims 2000 pure sine wave inverter is pluged to
Since you say the batteries are new and at full charge, the low voltage alarm is very likely due to the voltage drop in the cables between the batteries and inverter.
To reduce the so-called voltage drop**, you need to use as thick a set of cables as practical, kept as short as possible. Try again with thicker, shorter cables and you shouldn't hear the low voltage alarm. (With a 1800 watts load, those cable has to conduct around 150-160 amps of the ~12 volts DC current. That's a lot!)
**You can buy a cheap voltmeter/multimeter and measure the DC voltages at the inveter end and also at the battery terminals, while using the hair drier. The difference in voltage you observe is the voltage drop due to the inherent resistance in the cables. Thicker and shorter cables have less resistance, thus less voltage drop.
SOURCE: Run a CPAP on a power inverter
I would not do this, you really need a pure sine wave inverter to guarantee the safety of your CPAP machine. At the price they are selling this device it could not be pure sine wave. 150W pure sine wave would be $70-$100.
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