Author Topic: Solar CT size  (Read 2149 times)

murphym578

  • Newbie
  • *
  • Posts: 1
  • Karma: +0/-0
Solar CT size
« on: July 30, 2016, 04:40:47 PM »
I currently have a Ted Pro Home (TED6000) that monitors my main lines.   I am looking to add solar monitoring, but my solar system is only rated 30 amps peak.   I am reluctant to just get the 200amp CTs since they have lower sensitivity and will not capture the lower output during the morning/evenings.  Can I use the 60amp CTs on the MTU? or will they only work with the spyder?

pfletch101

  • Sr. Member
  • ****
  • Posts: 427
  • Karma: +0/-0
    • My home page
Re: Solar CT size
« Reply #1 on: July 31, 2016, 04:51:30 PM »
AFAIK, the lower current CTs only work with the Spyder. OTOH, you may have been confused by the discussions here about the inability of Spyder channels to record currents below a certain minimum level, which is higher for the higher current CTs. This limitation does not apply to the MTU channels, which read linearly all the way down to (and through) zero current. You inevitably lose a bit of precision and relative accuracy at low currents, but they work well for solar monitoring.
Peter R. Fletcher
TED Pro Home - main MTUs monitoring utility and PV Solar feeds; 2 Spyders monitoring selected individual circuits