BFL13 wrote:
Also don't forget their other advice about oversizing the array. They warn you are just wasting your money since the controller will just clip the amps.
You are not wasting your money because you are getting more amp-hours with the same controller.
True, to squeeze every possible AH out of the larger array, you also need a larger controller. Not $5 larger. Once you are in big arrays, then MPPT comes with the territory, and the difference in price of 45A and 60A MPPT is $100 or more, plus - possibly - a beefier cable, while panels are cheap. But this is a different subject. The issue that they raised was to oversize or not, and the answer is - yes, you can, and there can be benefits to this.
At some point down the road it won't make sense to oversize anymore, because of diminishing returns. Then you will need a bigger controller. And then you can oversize again :)...
