Re: Do solar panels emit harmful EMFs?
In general, Solar panels are DC devices, so you do not have the alternating magnetic fields of AC (alternating current) power (your home wiring and appliances).
There may be some ripple (variable DC current)--but if this is a Grid Tied system, those levels will still be pretty low when compared to you running a toaster or electric mixer.
If this was an off-grid system, you would have some DC switching currents (caused by the solar charge controllers) that could be higher levels--but they should be no worst than normal AC home wiring.
The only time I have ever seen any "obvious" issues with large AC magnetic fields was when the company installed a new office that backup to the AC Mains Transformer closet that supply power to the office complex.
A couple of software engineers had Monitors (the "old" picture tube type) that "swam" because of the magnetic fields from the power transformer.
On the whole, the electrical field issues with DC solar panels should be much less than the typical AC fields in your home, and less than the earths magnetic field (when you are more than a couple inches or feet from the wiring/panels).
There are people that appear to be susceptible to EM fields--but many of those folks seem to even have issues with normal house wiring too...
Cell phones, microwave ovens, and even computers emit electrical fields... Typically, for low frequency fields (less than 180 MHz) they come the cabling. Above 180 MHz, the fields come from gaps in sheet metal cases and such.
The high frequency fields (microwave type) are the ones that heat food (causing polar molecules like water H2O to flip back and forth) and damage eyes (i.e., radar operators exposed to early microwave radar systems during WWII) have levels are many 100's to 1,000's (or even millions) of times higher than is typically allowed in commercial equipment.
The fundimental frequencies from the DC side solar power systems is probably down in the 100's of Hz--Quite a huge difference.
Typical Grid Tied inverters these days should be rated to meet EMI requirements to prevent interference with radios/tv's/aircraft navigation equipment/etc.
To give you a very rough idea of how low the radio frequency transmission (30MHz and above) levels from computers (electronics) are--I would setup an antenna ~10 feet away from our computer under test. This was in San Jose CA (major city)--If I could see any emissions from our computer that was above all of the 1,000's of radio transmissions in the air around us--Then I would assume that those frequencies I saw were probably going to cause us problems in open field testing later (50 miles away, in a deep sheltered valley with the antenna 10 meters away).
I would not worry specifically about the emissions from solar panels and power systems over that of normal AC house wiring or your cell phone (which are hugely higher power levels--from an engineering point of view).
If you start reading around post #7 in this thread--this person has tremendous issues being around any "modern" devices because of his health issues... If you where in his shoes--then I would be worried about more than just the solar panels.
20x BP 4175B panels (replacement) + Xantrex GT 3.3 inverter for 3kW Grid Tied system + Honda eu2000i Inverter/Generator for emergency backup.