Troubleshooting Over Voltage Alarm on Off-Grid System
Asked by SolarSquirrel92
Hey everyone! I'm running into an issue with my DIY off-grid solar setup and could really use some advice. I have four 535w Jinko solar panels (and I'm planning to add two more soon), paired with a PowMr 80 amp MPPT charge controller. I'm using two 100ah Eco-Worthy 48v batteries and a 48v 4000 watt pure sine wave inverter from OLTEANP. My problem is that I'm getting an over voltage alarm when my batteries hit 100%. I think this indicates they're still charging even after reaching full capacity. Everything else seems to work fine, but I'm not sure how to resolve this. Do I need to adjust my MPPT settings, or do my batteries require balancing? Any help would be greatly appreciated!
Answers
This is a pretty common issue! Chances are your boost/absorption voltage settings are just too high. Try switching to the USE setting on your MPPT and lower that boost voltage. It should help prevent that over voltage alarm from going off.
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TechWhiz21: Got it! The default parameters are 58.0v for Boost Voltage, 55.2v for Float Voltage, and 52.8v for MPP Tracking Return Voltage. Any specific numbers you’d suggest I adjust to?