In a sale i picked up a 115w panel with 37v output and plan to connect this to a 12v dc 50w pump via a voltage regulator.
Connect 12 v pump to solar panel.
Its just to fill a water tank from a river no hurry to fill the tank the pump can run for days if needed.
The following solar panel wiring diagram shows that a 12v 120w pv panel is connected to the solar charge controller panel negative terminal of panel to the negative terminal of mppt charge controller and vice versa for positive terminal.
Solar panels are more or less current sources 50 sun 50 torque.
An even better solution is to also use a linear current booster lcb between the solar panel and the solar pump.
Hello dosto aaj ham apko 12v dc motor with pump kaishe solar she ham chalate hai aur eshashe ham bina battery ke motor pump 110psi chala shakte hai.
Can i run say a 3 3 amp 12v pump thats about 40 watts directly off a solar panel with no battery or voltage reg.
The voltage regulator came from e bay and is designed for golf cart use.
Try wiring the panel to charge a battery and run the pump off the battery.
It depends on the pump.
A solar panel will vary the energy causing your pump to run erratically and possibly not at all.
The dc to ac inverter is fed up by the direct solar panels during normal sunshine day and batteries in case of shading or night.
Im not sure what the startup requirements are for that size pump.
There are dc solar pumps designed to work directly with a solar panel.
The lcb takes solar panel power at low current and fixed vmp vmp i sun and converts to high current low voltage used to start the pump motor.
Solar panels work optimally in the sunshine and hence to ensure we have this power available all the time we have to store this charge in 12 volt batteries for use at night.
We can connect the power generating pv panel and energy storage as backup power in batteries with the 12v ups inverter and solar charge controller.
Solar panels when there is at least weak direct sun run a constant vmp and low isun current.