The exact number of solar panels you need to run a washing machine depends on various factors, such as the capacity of the solar panels, the energy consumption of the washing machine, and the availability of sunlight.

A standard household washing machine usually has a power rating of about 500-1500 watts. To make a rough estimate, let's assume an average power of 1000 watts for a washing machine.

The power generated by solar panels varies, but a common capacity per solar panel is around 250-350 watts. To run a 1000-watt washing machine, you would therefore need at least 3-4 solar panels of 250 watts each. The exact number may vary depending on the efficiency of the solar panels and the amount of sunlight available.

It is important to note that solar panels do not continuously provide their maximum power. The output can vary depending on factors such as the angle of the sun, cloud cover, and shadows. Additionally, the energy consumption of the washing machine depends on the settings and duration of the wash cycle.

It is advisable to consult a professional solar energy specialist to get an accurate estimate of the number of solar panels you need to run your specific washing machine, taking into account the specific circumstances of your situation.