An existing 100A underground service with standard meter and timer-interrupted OP meter (OP tariff no longer available)
Mandolin and I have spent a couple beautiful days this week upgrading an underground service from 100A to 200A, and re-configuring the metering to support the net output of an upcoming solar PV installation by frequent partner and friends, Sumintra, LLC.
PECO requires two meters for grid-tied solar PV installations: 1 to measure what they deliver, and the 2nd to measure what you provide to the grid. The difference is what you pay, and PECO settles up any overpayment at the end of each year.
Since I could not make the underground service RMC raceway (‘conduit’) and service entrance raceway connect directly to any arrangement of right- or left-hand meter enclosures, I had to install a wiring trough between the existing pipe work and the new meter configuration. As it turned out, the short conductors of the original installation required a splice box in any case, since they would never have stretched across the generous wiring space of a 200A underground meter enclosure.
Using the trough also allowed me to shift the new meter setup to the right of its previous location, providing proper safe working clearance for this equipment.
Licensed Electrician Robert Monk Solar PV in/out dual meters and 200A upgrade Copyright Robert Monk, 2012
Source: http://www.phillylicensedelectrician.com/solar-pv-inout-dual-meters-and-200a-upgrade/
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