Quote:
Originally Posted by bryankloos
39.2v and 9.7a each.
2 in parallel would be 39.2v and 19.4a, correct?
Seems the 100/30 would be good up to about 450 watts of panel. Given I’ll lever hit 600 with both as one will be flat in the roof and the other ground deployed I think I’d be safe.
That said, is it worth the extra $100 for the 100/50 to have the full capacity I. The event I ever do achieve greater than 450w? Assuming I hit the full 600 would it cause damage to the system or simply clip and max out?
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Yes on output voltage and current with panels feeding controller in parallel. The theoretical max wattage would be 760 watts.
If this was my "project" I'd go with the 100/50 MPPT controller so you can use the maximum capacity of the panels.
With Solar Controllers the hard limit is voltage which in your case would never exceed 80 volts, even if panels were connected in series.
That leaves the current limit which as you mentioned, it would just peak at rated capacity of controller and produce no more current.
Depending on brand of solar controller the difference in cost for a 50 amp controller rated for ~700 watts is less then the cost of a larger replacement controller.
In short, people often go small in the beginning to save money then end up spending more than if they'd gone with the larger controller to begin with.
I'm a big fan of Victron and if it were me I'd install a Victron Smart MPPT 100/50.
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