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Post by Phil on Jul 20, 2017 10:23:17 GMT -8
Is there any issue with placing a load (small fan) in front of the charge controller? This power is of course not going to the charge controller, and therefore not charging the battery, but I'm curious if this puts any strain on the charge controller.
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Post by tattoo on Jul 20, 2017 10:43:30 GMT -8
Is there any issue with placing a load (small fan) in front of the charge controller? This power is of course not going to the charge controller, and therefore not charging the battery, but I'm curious if this puts any strain on the charge controller. How can it put a strain on the CC if it's not hooked to the CC??? If I read what you wrote right??? |
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Post by Phil on Jul 20, 2017 12:04:45 GMT -8
Is there any issue with placing a load (small fan) in front of the charge controller? This power is of course not going to the charge controller, and therefore not charging the battery, but I'm curious if this puts any strain on the charge controller. How can it put a strain on the CC if it's not hooked to the CC??? If I read what you wrote right??? Essentially it is line series with the CC. |
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Post by rabird on Jul 20, 2017 12:26:25 GMT -8
panels operate over a wide range of voltages, in bulk the panel is going operate at batt voltage (hopefully not affected by the fan load). During regulation the controller (PWM) is on and off very fast, during the on time @ batt v, during the off time Voc (~21v for 12 system). So now ya add a load of some resistance, during the off time the panel will operate at some unknown voltage, likely low and the fan may slow down. Let us know how it works. here is a video of how a 21 watt bulb and 20w panel operate @ 6v!!!! not a perfect match. multiple parts www.youtube.com/watch?v=JZQEJ33xblE |
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Post by Phil on Jul 21, 2017 5:34:13 GMT -8
Right. I can definitely hear the fan oscillating in rpm at an almost regular frequency during low power situations. It's a small computer fan so I figured at least it should be ok with variable voltage.
I guess I will have to determine whether the charge controller is experiencing less than ideal conditions and charging the battery slower.
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Post by Phil on Jul 21, 2017 5:35:52 GMT -8
Also, thanks for the help everyone. I really appreciate you taking time out of your day to answer my dumb questions on the internet.
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Post by WayneSallee on Jul 21, 2017 8:47:12 GMT -8
A small computer fan should not cause any problem, but one thing to keep in mind is that larger items could create electrical noise / spikes that the charge controller might not be designed to handle, since there normally would not be a need to add protection for such on the solar input. Wayne Sallee Wayne@WayneSallee.com www.WayneSallee.com |
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