high-voltage mppt controllers?
I'd like to mount two 260-290 watt panels on my TT, rather than several smaller more expensive 100-150w panels. What controllers are popular these days, for high cell count panels (60 to 72 cells p...
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2oldman wrote:GordonThree wrote:Jees, I thought Outback was a pretty decent brand. Just perused the MS manual. Nice unit, no doubt, and nothing in there about heat.
By being properly designed. It shouldn't heat up, so it doesn't need to cool down.
By saying it shouldn't heat up, do you mean not even warm?
Yes, I would expect it to get warm, especially handling 1000+ watts of power, even at 90% efficiency, that's still 100 watts of heat to get rid of ... but it shouldn't runaway where it just keeps getting hotter and hotter and needs "fresh air" or a large airflow.
50/50 for fans ... if they're good fans with sealed bearings, cool, but if they're using China Special 5 cent roller bearing fans that start to chew dust after 1000 hours operation, no thanks.
I'm thinking the Outback and Midnight were designed for being installed in larger electrical rooms. The big heat sink on the MorningStar tells me they planned for installs in space limited RV bays and other less than ideal locations.
I'll email Midnite and ask if they can elaborate on their 25C de-rate, maybe they can give me a graph showing amp capacity vs ambient temperature.
