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Output Current Rating 30 Amp maximum, automatic 30 Amp current limit Nominal Battery Voltage 12 / 24VDC PV Input Voltage 57VDC maximum2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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Watch out for the low max voc. of Blue Sky charge controllers. There's no practical way to series wire panels in a 24 volt system for max MPPT input voltage without going over their 57 volt max voc. Ex. 2-72 cell (24 volt) panels. Approx. 90 voc. 3 -36 cell (12 volt) panels, approx. 63 voc. 2-60 cell panels, approx. 72 voc. This low voc. limit on these controllers never made sense to me. They are fine for using 24 volt panels for a 12 volt system but even the model number, "Solar Boost 3024i" indicates it's intended for a 24 volt system. They do seem to be well built quality units otherwise.
Output Current Rating 30 Amp maximum, automatic 30 Amp current limit Nominal Battery Voltage 12 / 24VDC PV Input Voltage 57VDC maximumComment
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Answer, it is Chi-Com junk not made to work in a real world.MSEE, PEComment
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2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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Ok, I’m a little confused. Should I be wiring up my panels in series to provide a higher voltage to the charge controller if I’m going to get an mppt? Also, I see you are calling blue sky chargers junk and some think the Renogy is junk.... so what would be my best bang for my buck for around 400 watts of panels?Comment
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Ok, I’m a little confused. Should I be wiring up my panels in series to provide a higher voltage to the charge controller if I’m going to get an mppt? Also, I see you are calling blue sky chargers junk and some think the Renogy is junk.... so what would be my best bang for my buck for around 400 watts of panels?Comment
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MSEE, PEComment
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300W at 18V is 16.7Amp, so you would need at least a 20Amp MPPT charge controller.
If you want to have some margin or go to 400W solar, then 30Amp would be better.
Some will support a single battery type, some will support different ones, Consider that if you want to future proof your system.Comment
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