Nature Power 60028 28-Amp/455-Watt 12-Volt/24-Volt Digital Solar Review

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I was looking forward to the metering features and settings flexibility on this charge controller, but it was a big disappointment. Its critical failure is in the basic charge control function. I might as well have connected the solar panel directly to the battery the controller was always charging at full panel output regardless of the battery voltage.

I tried lowering the cut off voltage to 13 volts to see if would ever shut off, but it still stayed in bulk charge mode no matter how I set or reset the configuration. I also found the meters to be very inaccurate, off by 1/2 to 1 amp (verified with an external meter).

While researching these problems I noticed that this a US labeled Chinese "Wellsee" charge controller, sold under several other names with slightly modified cases.

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This item is both cheap and dangerous. I say dangerous because the display lies. It said it was not delivering any amperage to my batteries, but a clamp on meter clearly showed it delivering all available amps from my panels, thus sending the battery to over voltage and gassing. The voltage measured at the battery spiked over 16V even though the charger was set to cut off at 13.7V. Stay away from this one.

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I installed a Renogy 200 watt solar system in my motor home but the reviews on their controller were not satisfactory to me. It is in and working as expected.

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I bought this because a friend of mine has one and it works very well. I have not got mine hooked up yet but I'm looking forward to using it on my 5th wheel solar system.