Re: Radio Noise from PV System
It is good news that you are happy with the noise profile of your PWM CCs.
Would guess that the more power that the CC is delivering to the batteries has an effect on the PWM noise. PWMs should be fairly quiet, but fast edges lead to improved efficency, but fast edges can also cause noise issues.
Often the polarization on the receive antenna, its capture area -- relative size, proximity to PV array and so forth are large factors. This is a large factor in Line-Conducted noise.
PN, you may be measuring mostly Radiated noise.
Often, True SineWave Inverters create more noise on HF than PWM CCs.
As an aside, many 12 volt HF transcievers do not make full power when operating from 12 volt batteries which are not under charge at that time ... some are much better than others. Some have very poor transmit IMD specs when Vbat is below 13.5-ish volts. YMMV, Vic
Off-Grid, Sys1: 1280 AH 48 V bat, 3.150 KW STC PV, MX-60, Xantrex Stacked SW+ 5548s; EU6500isa, 21KW Kubota diesel gens, misc Honda Eu gens
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