For an on grid system it is down to budget and space available.
Solar panel calculator 12v.
The number of solar panels needed 5000 240 20 8 solar panels.
Complementing this range are the redarc sine.
Redarc have a range of solar panels and blankets that are designed to the highest quality to maximise efficiency and integrity.
Then a number of solar panels that you need are.
You need to ensure the pump can take that voltage.
Actual charging times will vary depending on geographic location time of year angle of the sun relative to the rv solar panel and weather conditions.
A 12v solar panel will output around 16 18 5 volts when connected depending on the panel.
Please note that solar panels are not 12v i repeat solar panels are not 12v.
Then times this value of each device by the time you intend on running it for.
This is done by finding the watt rating of all the devices you intend to run.
The solar panel calculator then estimates how much your total appliance power requirement is per day and suggests products and equipment that will help you meet those needs.
Use our 12v solar panel calculator.
You have chosen your system voltage to be 12v and your solar panel to be 240watt for the 12v solar system.
As far as what is required you said it is a 20 60 watt pump so any panel in that range in full sun will turn the pump as long as the pump is designed to run at the higher voltage the panel puts out.
Off grid firstly you need to calculate the amount of power you will require.
To calculate the energy it can supply the battery with divide the watts by the voltage of the solar panel.
Rates are based on a 12v system with 5 hour charging times.