Indeed re merit Ken. Like I said earlier. The easy way to see this in action is to experiment with this spreadsheet:
http://www.victronenergy.com/support-and-downloads/software#mppt-calculator-excel-sheet
Note you can also add panels of your own choice in the custom field. Higher voltages will be more efficient, the higher voltage also means you will also start charging earlier in the morning and continue later in the evening. For more information about matching panels to MPPTs see:
http://www.victronenergy.com/blog/2014/03/28/matching-victron-energy-solar-modules-to-the-new-mppt-charge-regulators/
I've no axe to grind here re Victron. I'm just a guy that converted his 26ft sailboat to 24V direct electric drive using a Lynch motor as the double row angular contact bearings will take the thrust up to a 12" prop. Anyhow re solar I spent ages looking for a supplier for stuff like solar, battery chargers etc and chose Victron. Subsequently and from time to time I now maintain their blog. I didn't write the MPPT blog though. That is specialist knowledge and Bob that wrote it knows his stuff. The blogs I write helps keep my boat on the water. So I like Victron kit and find them very helpful folk. With ref to not having too high a voltage per a previous post then that is about matching the panel to the MPPT controller size. I learned heaps playing with that spreadsheet as you can see it in action and if you use panels from another supplier as I said before you just enter the panel data in the custom field in the tabs at the bottom of the sheet to see the result. Hope that helps.
John
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