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I have a 235 W solar panel that I wish to take with me on camping trips. I’m looking at getting a Goal Zero “solar generator” product to store the energy from the panel, specifically the lithium-ion versions. The battery (Yeti 1000 and Yeti 1400) is rated on the spec sheet as being able to take input of 12-22 V. The Voc of the panel is listed as 37.06 V.

Does the charge controller in the battery allow me to connect higher voltage panels and automatically lower it to match, or are these products incompatible? If so, what will the compromises be?

Assuming I want to use the battery, and want a 200+ W portable panel(s), what are my options? I just want the biggest solar panel(s) that I can fit on the roof of my car.

Thanks and sorry if this question isn’t in the scope of this section of StackExchange. I did search other questions.

Edit: links to products.

Panel (235): http://www.suniva.com/documents/MVP60Cell_022912.pdf

Battery: https://www.goalzero.com/shop/power-stations/goal-zero-yeti-1000-lithium-portable-power-station/

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  • \$\begingroup\$ That's not camping... though if you're heading up the West Highland Way with a 235W solar panel on your backpack ... respect. In any case, some links to datasheets would probably help getting answers. \$\endgroup\$ – Brian Drummond Mar 23 '18 at 13:18
  • \$\begingroup\$ *The battery (Yeti 1000 and Yeti 1400) is rated on the spec sheet as being able to take input of 12-22 V. The Voc of the panel is listed as 37.06 V *. Last time I did some comparisons, 37 was larger than 22. I think it still is. \$\endgroup\$ – Neil_UK Mar 23 '18 at 13:23
  • \$\begingroup\$ Edited to add links. \$\endgroup\$ – Dustin Trombly Mar 23 '18 at 14:53
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The solution to your problem is known as a MPPT. Maximum power point tracker. This charger allows the panel to operate at its optimum Voltage and Current point while charging the battery at its optimum operating characteristics.

There are many products on the market that do this but beware of cheap Chinese products that claim to do this but don't. Read some reviews for the product that you intend to buy.

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  • 1
    \$\begingroup\$ Maximum Power Point Tracker/Tracking* \$\endgroup\$ – Remco Vink Sep 7 '18 at 10:18
  • \$\begingroup\$ @Remco Vink thanks for the correction editing the answer. \$\endgroup\$ – RoyC Sep 7 '18 at 10:21

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