Hello to all! I have been running a solar battery charging system at my house for several months now. I am using a Raspberry Pi with a 4 channel A/D converter to keep track of my watt hours, amperage and voltage. I am also a ham radio operator and I have discovered that when I am transmitting on certain bands the long wires to the solar panels pick up stray RF. This causes very strange off-scale spikes in my data. I have been working on better RF shielding without much success. My questions is, how best to deal with the known invalid data. Do I delete the data points in question? Do I average my values to smooth it out? Do I interpolate my data based on the data points before and after the spike? I am hoping that someone in the science data field can help as I want as accurate of data as possible. I am also keeping a running total of watt hours and I know that the spikes have falsely added to that total as well. Any suggestions would be greatly appreciated.

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It all depends on the amount of RFI getting into your logging system.
If it is just an odd point, then ignoring it is probably the simplest.
If there is a lot then you need to look at "back filling" or averaging. The best solution is to filter out the RF before it gets into the loggers - s very simple low pass filter should work as you are measuring "DC" compared to the Mega Herz of your RF signals.

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?