frik100

Hi. I was at the point of going for Sunsynk....now have serious doubts. Reading the comments/concerns leads me to thinking RSA is again being used as dumping ground for equipment not allowed in Europe. I think one needs to firstly distinguish between "mechanical" and "electrical" noize. Mechanical is generally sound generated by mosfet switching or inductor windings vibrating (poor manufacture). This should only be audible by those with hearing still capable of picking up >18khz or so and only in close proximity to the unit. I can sort of live with that if not too loud....if audible further than say 1 meter = poor manufacture (many switch mode systems are audible to some extent). The fact many refered to other equipment supplied from their inverter is a HUGE concern. That in my view is due to electrical noise flowing in the house wiring....also why some resort to filters. Question is then: has anyone measured this electrical noise at the inverter output? This might be above allowable levels (will not be tolerated in Europe and hence dumped here).....this might also be underlying reason for poor tech support. (dodging reality) Just upping the switch frequency is simply a bandaid....the line noize is still there and can cause issues (malfunctions/failure) with connected equipment. There is a reason for prohibiting EMC above certain levels. If it can interfere with neighboring prepay devices it must be serious. I specifically ask electrical measurements (harmonic analysis and / or waveform distortion) at the inverter as wiring impedance will dampen this electrical noize. (Possible reason why only some notice it at end devices). Can anybody advise please?