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Hi. There's a number of threads on trying to add non-matching panels to systems, but I haven't really found my questions answered. Actual questions at the end, background below. My existing system is 2 parallel 3-panel strings of Sunpower SPR-X20-250-BLKs -- (128/153V Vmp/Voc, 5.8/6.2A...

_That_ hadn't even occurred to me, but would certainly solve the issue. Though it might require cables getting chased a little bit all over the place. I'm not exactly "intentionally placing a panel in shaded conditions", and I'm aware that even a bit of shade will hurt a panel/string's output...

So my inverter is failing and so I'm using that as an excuse to move my battery bank from 12V to 24V. Have been curious about this for years and wondering if anybody knows the answer: Pretty much _every_ solar charge controller will work with 12-48V nominal... but there are _no_ inverters...

Inverters specifically, I'll grant that. But take a look at DC-DC converters. You can buy a 48->12V converter. You can buy a 48->24V converter. Take 120VAC battery chargers. Would not be significantly more expensive to design one that charges nominal 12V-24V batteries. You can only buy 12V...

??? With the exception of some of the smaller <40A controllers being 12-24V, and some of the _really_ huge ones being voltage-specific, almost every controller is 12-48V. Victron's entire line... Renogy's entire line... pretty much every Chinesium one on Amazon.