No, the Progressive Dynamics is silent, unlike the irritating hum of the
Univolt. The only thing you can hear is occasionally the cooling fan
comes on for a bit, but it is whisper quiet.
Daisy
> 8 years would be great, I think I have 3 or 4 on the marine deep cycle I bought when
> I got this trailer. By the way, does the new charger hum like the old ones did? The hum
> is both good and bad. It seems a little loud sometimes when you are reading in the
> trailer, but it does tell you that you have power.
>
> A Wyoming e-mail.