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Replacing an inefficient Zamp solar kit with a Overland kit

Zamp solar kit Overland solar kit 6 volt batteries

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#51 Vic Harder

Vic Harder

    Get's a "charge" out of camping!

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Posted 02 June 2019 - 06:28 PM

Kent, flexible panels tend to be much more expensive (at least up here in Canada).

275w is still very nice. i have 265 and am looking at 42w of power going into my batteries right now. my 130l truckfridge also has not been off since installed 30 months ago
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#52 pvstoy

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Posted 03 June 2019 - 01:35 AM

I do have 3 (three) Overland Solar 160 watt panels on my roof for 480 watts. Yes they are more expensive, but... I like them.

 

I have noticed in rain that the battery is still being charged.  I run them in parallel as the voltage I normal see is 28 volts.  That is enough head room when it is cloudy and raining when less voltage is being produced to still produce some charging. Above 19 volts  the MPPT charger can make something out of.  But if your panel caps out at 20 volts when it is cloudy or raining it is not giving your controller much to make anything in return as it might be putting out 12-15 volts.

 

If I had multiple panels that were around 18-22 volts I would have wired them up in Serial to increase the voltage and sacrifice amps, this would do much better in low light conditions.

 

I have found these panels have been working out really good and have yet to use the trucks alternator to do any help charging.  I do have the very inefficient Dometic 130 liter DC refrigerator.  But I really like the large freezer space.


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Patrick

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