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And if you decide on the SS MPPT and two panels, you have the option of connecting the panels in series to produce a nominal 24V solar input. This way you could have one cable, up to a 25' run of 10 ga for the convenience of getting the panels in full sun while your vehicle is in the shade. The battery will still charge as a 12V. The controller senses battery voltage within a specific range to "indentify" whether the battery bank is 12V or 24V.
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My setup is like this now with two panels and the series connection with it's higher voltage creates a situation where my MPPT controller send an additional amp to the battery than when the panels were connected in parallel. Over 12.5 amps are now sent to the battery rather than the 11.5 amps from the parallel connection. Granted, this may not seem like much but it does help speed up the "bulk" phase of battery charging.
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My system works well enough when using just one of these 100W panels. I only added the second panel to connect for days of full cloud cover, but was later educated on the higher-voltage series connection. If this post seems confusing, nevermind. I'm just now coming up to speed with my first cup of coffee.