Hi,

Does solar panel too requires reverse polarity protection OR reverse polarity protection is only required in case of battery???

I tried to explore internet and gone through various post but nowhere i found Reverse polarity protection for solar panel, instead i got reverse current flow to solar panel protection using MOSFET at panel side. It may be possible that same MOSFET might be protecting from reverse polarity too along with reverse current flow protection to solar panel but i am NOT sure.
But i am sure that the MOSFET used is for reverse current protection.

Do i require extra MOSFET for reverse polarity protection of solar panel or the same MOSFET Q1 will do the job.
Please find the attachment. You will find MOSFET Q1 at right corner.

Can anyone guide me on this.??? It is really important to me.

Thank you..!!!

 

I can't tell what you're trying to protect from reversed connections. Post a schematic of the power connections.

 

In what ways can the panel be incorrectly connected? How many times will the system be dis and re assembled?

 

Even it happen one time, controller or less likely Panel is gone and damage is done. Moreover, if under maintenance it may require to re assemble.

 

Does solar panel too requires reverse polarity protection OR reverse polarity protection is only required in case of battery???

If there is no other current source, there is nothing to protect the panel from.

Are you asking about protecting the panel from reverse current from the battery, in the dark. Or are you asking about protection from hooking up the panel incorrectly to the circuit?

 

i am asking about protection from hooking up the panel incorrectly to the circuit. There is other current source in the system (Battery)

 

I would first recommend proper distinctive color coding and labeling to guide the technician to do the work properly in the first place.

If I continue to hire incompetent workers the next thing to do is add either a MOSFET or diode.

 

I look the drawing ,are you using a battery or another power source. can i know from you the level
of battery voltage you are using,is it 9v or 12v. What input do want to protect, Vin,Vcc .

 

i am asking about protection from hooking up the panel incorrectly to the circuit.

Use polarized connectors. If you don't use a connector, use colored wires. If wires aren't colored, attach colored tape.

 

I look the drawing ,are you using a battery or another power source. can i know from you the level
of battery voltage you are using,is it 9v or 12v. What input do want to protect, Vin,Vcc .

12 volt battery and i want to isolate circuit in case of reverse panel voltage

 

12 volt battery and i want to isolate circuit in case of reverse panel voltage

You can use a single diode. You can use a bridge rectifier if you want to make the connection polarity independent; assuming you can tolerate 2 diode drops.

 

ok.. thanks for your suggestion...!!