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CA_Traveler's avatar
CA_Traveler
Explorer III
Jun 10, 2020

Solar Controllers PWM MPPT Temperature Performance

It’s often stated that PWM performs better than MPPT up to 10% at higher temperatures which is a statement that’s largely out of context and basically incorrect. For anything other than for simple sol...
BFL13's avatar
BFL13
Explorer II
Jun 12, 2020
The specs for your controller will include a voltage limit. The voltage used for that limit is the open circuit voltage (Voc) of your panels added up if they are in series or for just one if they are in parallel.

Those panel spec Vocs are for 25C temperature (about 77F) and voltage goes up when it is colder than that. So they warn to allow more than rated Voc when camping in the cold so you don't hit that total Voc limit and fry your controller.

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