This site has about 180-200W of load. The TSP power supply is 360W. I know the BCM has about a ~55W overhead for charging, so that should still leave plenty of headroom, wouldn't you think?
On Sun, May 28, 2017 at 1:19 PM, Bill Prince <part15...@gmail.com> wrote: > Might be as simple as your AC circuit is too small for the whole load. The > key questions are (1) What is the load of your equipment?, and (2) What is > the bulk charge load on your controller? > > Add those two together to understand what the total load should be. > > > bp > <part15sbs{at}gmail{dot}com> > > > On 5/28/2017 9:19 AM, Josh Baird wrote: > >> I have a site with a TSP+BCM 48V combo. Last night, something caused the >> AC breaker to trip, putting the site on battery. We didn't see the alert >> until about 12 hours later. At this point, the batteries were down to >> ~42V. When our guy arrived on site, he reset the AC breaker, and AC power >> was restored. Immediately, the battery breaker (breaker between positive >> side of the batteries and the BCM) tripped. >> >> Now, each time that we reset the battery breaker, it causes the AC >> breaker to immediately trip. At this point, the site is up on AC with no >> battery. Any ideas what would be causing this? Do you think the batteries >> are causing the BCM to draw too much current? Could one (or more) of the >> batteries be dead/bad? The site *did* run successfully on battery for >> nearly 12 hours. >> >> Josh >> > >