Quick Test of Eco-Worthy MPPT Controller
Ordered it on 3 Oct arrived at the door 23 Oct free shipping. Controller rated to 42V so watch that. EG I have it on one 230w panel, Voc 37v at 25C, so would be more Voc at cold temps. Not ab...
Forum Discussion
I did mention that 42v in the OP.
I see the Hanwha 300w panel (mine is their 230w--now replaced in their line-up with a 235w) has a Voc of 45.67
That is what I meant by a mismatch in the 300w limit and the 42v limit.
Yes, you see several 12v panels with 22.x Voc instead of 21.x but with the same wattage. That makes Isc lower with the 22s, and I have posted before about that saying I would rather have the higher Isc for PWM.
However, based on all the info recently, it may be that the higher Voc but lower Isc might be better for MPPT. Still don't know that for a fact. It also seems more often that the 22s are mono instead of poly, but not always.
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Almot, I ran two 20a controllers instead of buying a bigger controller when one 20a was too small for my array at the time.
I could split the array and have one controller for each part or parallel all the panels, run one wire back to the trailer with a Y in that end near the trailer and use one controller on each leg of the Y.
I did it different ways at times. It all comes to the same total amps on the Trimetric.
Now I have split the battery bank itself, so I need two separate arrays and controllers, one for each bank. I can pick and choose which bank gets which array and controller, but I can't swap controllers by array since one array is 24v and the other is 12v and I have the one MPPT controller and one PWM.
I see the Hanwha 300w panel (mine is their 230w--now replaced in their line-up with a 235w) has a Voc of 45.67
That is what I meant by a mismatch in the 300w limit and the 42v limit.
Yes, you see several 12v panels with 22.x Voc instead of 21.x but with the same wattage. That makes Isc lower with the 22s, and I have posted before about that saying I would rather have the higher Isc for PWM.
However, based on all the info recently, it may be that the higher Voc but lower Isc might be better for MPPT. Still don't know that for a fact. It also seems more often that the 22s are mono instead of poly, but not always.
---------
Almot, I ran two 20a controllers instead of buying a bigger controller when one 20a was too small for my array at the time.
I could split the array and have one controller for each part or parallel all the panels, run one wire back to the trailer with a Y in that end near the trailer and use one controller on each leg of the Y.
I did it different ways at times. It all comes to the same total amps on the Trimetric.
Now I have split the battery bank itself, so I need two separate arrays and controllers, one for each bank. I can pick and choose which bank gets which array and controller, but I can't swap controllers by array since one array is 24v and the other is 12v and I have the one MPPT controller and one PWM.
