Rogue 20A MPPT Controller Question
Maybe Marc will chime in but maybe this question is generic enough that others might answer. I was perusing the Rogue 20A manual and saw the 320W limit for 12V systems. I'm wanting to put two 150W pan...
Forum Discussion
In the manual above the 320w recommended limit guide it says:
"....... Conversely, an array that is oversized will constantly push the MPT-2024 to its maximum limit of 20A. At and beyond this limit the power from the array is constrained and the MPPT algorithm is overridden so that the controller does not exceed its maximum current output. To avoid wasting available power, follow the guidelines given in Table 4.4.1 when sizing your array."
With 300w you should see 300/130 x8.2 = 19a with PWM and array pointed at a high sun. MPPT should be slightly more amps so the 320w recommended limit checks out with my formula (so Marc got his math right :) )
So IMO, although you will not hit the 100voc limit with two 22v panels, there is no point adding more panels. You can get a second controller for another set of panels and put both controllers on the battery bank, or get a higher amp/watt controller.
Or for a lot less money---- :)
"....... Conversely, an array that is oversized will constantly push the MPT-2024 to its maximum limit of 20A. At and beyond this limit the power from the array is constrained and the MPPT algorithm is overridden so that the controller does not exceed its maximum current output. To avoid wasting available power, follow the guidelines given in Table 4.4.1 when sizing your array."
With 300w you should see 300/130 x8.2 = 19a with PWM and array pointed at a high sun. MPPT should be slightly more amps so the 320w recommended limit checks out with my formula (so Marc got his math right :) )
So IMO, although you will not hit the 100voc limit with two 22v panels, there is no point adding more panels. You can get a second controller for another set of panels and put both controllers on the battery bank, or get a higher amp/watt controller.
Or for a lot less money---- :)
