NewShockerGuy
Gawd
- Joined
- Jan 24, 2002
- Messages
- 689
I'm not undestanding this as far as wiring my fans up.
I have 3 fans that I want to run off a solar panel that is putting out 5watts of power and is rated at 12v. The raw output of the solar panel is up to 21v and when I hook a load up to it, IE: A fan it significantly drops down in voltage...
My problem is this. When the solar panel is putting out 19v of power when I hook one single 120mm fan up to it, it drops the voltage down to about 6-7v that I can read from my multimeter.
So I figured if I wire two 120mm fans in parallel but the problem is that the solar panel doesn't even spin the fans.
IF however I wire the two 120mm fans in series with each other.. postivie to negative, then postive to positive wire on the solar panel and ground to ground I see that the panel then drops down to around 14-15 volts...
If I wire 3 fans in series then the voltage goes to about 17v.... and they all spin.
So I guess my question is why does the voltage increase and all the fans work when wired in series rather than parallel?
I know when you wire batteries in series, you increase the voltage but keep the same AH, and then when you wire them in parallel the voltage stays the same but the AH increases... So in terms of fans wired in series and parallel I guess I'm confused about how they draw power.
I thought by wiring the fans in series it would lower the voltage of the solar panel to around 12v's but it didn't and the solar panel put out around 16-17v to the fans, which is going to be too much in the long run I think and make them die faster...etc. Just wondering what I can do to get the fans to run at 12v and bring the panel down in voltage a little bit.
Thanks,
-Nigel
I have 3 fans that I want to run off a solar panel that is putting out 5watts of power and is rated at 12v. The raw output of the solar panel is up to 21v and when I hook a load up to it, IE: A fan it significantly drops down in voltage...
My problem is this. When the solar panel is putting out 19v of power when I hook one single 120mm fan up to it, it drops the voltage down to about 6-7v that I can read from my multimeter.
So I figured if I wire two 120mm fans in parallel but the problem is that the solar panel doesn't even spin the fans.
IF however I wire the two 120mm fans in series with each other.. postivie to negative, then postive to positive wire on the solar panel and ground to ground I see that the panel then drops down to around 14-15 volts...
If I wire 3 fans in series then the voltage goes to about 17v.... and they all spin.
So I guess my question is why does the voltage increase and all the fans work when wired in series rather than parallel?
I know when you wire batteries in series, you increase the voltage but keep the same AH, and then when you wire them in parallel the voltage stays the same but the AH increases... So in terms of fans wired in series and parallel I guess I'm confused about how they draw power.
I thought by wiring the fans in series it would lower the voltage of the solar panel to around 12v's but it didn't and the solar panel put out around 16-17v to the fans, which is going to be too much in the long run I think and make them die faster...etc. Just wondering what I can do to get the fans to run at 12v and bring the panel down in voltage a little bit.
Thanks,
-Nigel