Solar microinverter RFI blankets entire HF spectrum for neighboring hams

Rooftop solar installations using microinverters and DC power optimizers generate broadband RF interference from 39 kHz through HF and into lower VHF, with harmonics that appear as a wall of noise across the entire 1.8-54 MHz amateur spectrum. Who has this problem? Any ham operator whose neighbor (or they themselves) installs a solar system with optimizers — which is most modern residential solar installations. So what? The interference is present during all daylight hours, exactly when HF propagation is best and most operators want to be on the air. So what? Unlike a single-frequency interference source that can be notch-filtered, solar RFI is broadband — there is no band to escape to. So what? Operators who invested $5,000-$15,000 in HF stations find their equipment rendered useless during daytime, with no technical mitigation available. So what? As solar adoption accelerates (40%+ annual growth in residential installations), the problem compounds — one noisy installation per block means every ham in the neighborhood is affected. Why does this persist? FCC Part 15 and Part 18 rules are not enforced against solar manufacturers. Inverter companies like SolarEdge and Enphase design for electrical efficiency, not RF cleanliness. Adding proper filtering would increase per-unit cost by $10-50, which in a price-competitive market, no manufacturer will do voluntarily.