12v Solar Panel

Peter Said:

Can I use a 12v, 13 watt solar panel on an AC Desk Fan?

We Answered:

As the others have said, your solar panel clearly does not provide enough power to drive the fan. If you use multiple panels in parallel, however, you may be able to get it to work with the assistance of an inverter circuit, shown in the link below. to get the power output you need you will need to do analysis on the circuit, which of course will require a background in electrical engineering. Also, the author states to not use it for inductive loads, but I'm sure you could get it to work by adding a corrective capacitive load to the load to the fan. This will require you to know the fan's impedance, which you could figure out with an oscilloscope.

short answer-

It would be MUCH easier to go with a DC fan.

Keith Said:

Using 48v solar panel, and 4 12v batteries, need to pull the 12v's off the batteries w/o disconnecting.?

We Answered:

if you want to pull off 12 volts across the load, that is, to keep the load balanced, just connect a diode to each battery, parallel the diodes so you will will get the battery voltage (12v) and blocking the other batteries from seeing each other.

You should use a Shottkey diode so that you do not have the .7v drop per diode if you need to keep a constant 12V.

Shirley Said:

I have a 16v solar panel and want ro charge 12v batteries without overcharging?

We Answered:

What is the wattage specification of this 16V solar panel? This is what will happen, you connect the 12V batteries and the 16V output will drop to the battery voltage level. Now, depending on the wattage output of this panel, you divide the wattage by 12V and you will get the charging current for this panel. If this charging current is lower than the normal charging current of the 12V battery, then basically you are trickle charging the batteries depending on how low the current is from the normal charging current specification of the 12V batteries. Since a Solar Panel is not voltage regulated, it will seek the voltage level of the battery that is connected to it. BTW, all of the above is in direct Sunlight.

Discuss It!

Mc paver said:

Nice blog

paver light said:

Thanks for the great information <a href="http://paverlightdepot.com">paver lights</a>