We’ve experienced this exact same behaviour last week. It seems like PWR1 and
PWR2 are acting like one now.
We are in process of replacing all the SiteMonitor II devices with Tycon
TPDIN-Monitor-WEB2, which can monitor more things and it’s a lot smarter.
> On 10 May 2017, at 01:31, Bill Prince <part15...@gmail.com> wrote:
>
> I think I have a SiteMonitor II with a problem, as I always thought that the
> two power sensors (PWR1 and PWR2) were independent of each other, and should
> have a pretty high impedance between then.
>
> We set up a new solar site, and put our load on PWR1 and the batteries on
> PWR2. As soon as we hook up either one of the sense wires, the breaker to the
> batteries (30 amp) pops, and all the lights go out.
>
> We can monitor one voltage on PWR1, or the same or different voltage on PWR2.
> However, if both are connected we blow the 30 amp breaker to the batteries.
>
> We've checked the polarity (both voltages are negative ground), and they are
> both "about" the same voltage (although we have monitored radically different
> voltage in the past (like 12V on one and 48V on the other). This is a 48VDC
> system, so we are seeing ~~ 56V on both right now,
>
> BTW, when we hook up just one of the sensors and leave the other open, we see
> ~~ 43 volts between PWR1 and PWR2. I haven't checked other SiteMonitors, but
> this doesn't seem right to me.
>
>
> --
> --
> bp
> part15sbs{at}gmail{dot}com
