Confusing the MPPT controller
Here I go with my ignorant self again, seeing something and thinking I can figure it out. ;) When I first got my original panels I talked to quite a few people including Mark at Rogue saying to run...
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What's too bad is I had to sell the 245w mono's to get the new controller. The one side by side I did with one of those and the 250w poly had both at 35 Voc. The result probably would have been the same as the 250w has a slightly higher Isc and it's controller had a bit of advantage in output. Each controller ran at a different Vmp even though they were on a shared load.
My hope is the info is useful to someone with mixed panels like I had. It might also help someone wanting to expand and not able to find a match to their original panel. The options are to add a new panel/smaller controller and run them in parallel with the old system and milking both for all you can. Add a new panel matched up as well as possible with a big controller to run both, just maybe not as optimal as it could be. I've done both of the above as well as the last option which is spend the cash to have matching panels that the big controller would be able to run and not be confused.
For me it's understanding what would have been had I followed the advice I was given three years ago. I would consider the person that owns the company that developed three MPPT controllers and discusses them in depth to be more than just some person. My mistake I guess. Lol
My hope is the info is useful to someone with mixed panels like I had. It might also help someone wanting to expand and not able to find a match to their original panel. The options are to add a new panel/smaller controller and run them in parallel with the old system and milking both for all you can. Add a new panel matched up as well as possible with a big controller to run both, just maybe not as optimal as it could be. I've done both of the above as well as the last option which is spend the cash to have matching panels that the big controller would be able to run and not be confused.
For me it's understanding what would have been had I followed the advice I was given three years ago. I would consider the person that owns the company that developed three MPPT controllers and discusses them in depth to be more than just some person. My mistake I guess. Lol
