Hey, the 420W charger is on its way from China (mid to end of May) but I am working on just tidying up wires, water proofing, etc. So, this generator is pretty silent like 55dB idle (no load) and like 65dB (charger load) but I still think some noise reduction can be done. I was thinking of lining the two side plastic panels with a sound dampening liner/insulation/styrofoam/???. Anyone got an idea what that might be? I work at a hardware store and they sell 1/4" insulation that I think is fire resistant but its like $35 for a bundle and I need like literally 5% of all of that. I think with even a thin liner I can reduce the sound by ~10dB. Of course, this needs to not dramatically heat up the engine and all vent ports will be opened. I love to have this thing almost impossible to hear unless you are within 20-30 feet of it.
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