David — Mahwah area (074)
6.4 kW DC · Installed May 2025 · Rockland Electric (RECO) territory
What got put on the roof
| Item | Detail |
|---|---|
| System size | 6.4 kW DC |
| Panel count (est.) | 16 panels — assuming 400 W modules |
| Installed | May 2025 |
| Utility | Rockland Electric (RECO) |
| Location | ZIP 074xx (New Jersey) |
Predicted vs actual production
The PVWatts number is what we used pre-install. The observed number is what the meter actually counted.
| Source | Annual production |
|---|---|
| NREL PVWatts prediction | 8,064 kWh |
| Observed (utility data) | 8,272 kWh |
| Delta | +2.6% — over the prediction |
What the SRECs paid out
NJ SREC-II / ADI in Rockland Electric (RECO) territory — each MWh produced earns one SREC, sold quarterly into the NJ market.
8.27 MWh
SRECs registered through the homeowner’s NJ GATS account for the trailing 12-month window. One MWh = one SREC.
$647
First-year SREC-II payout. NJ’s administratively determined incentive currently sets $76–95/MWh for 15 years — this study’s number reflects what cleared.
Before vs after the install
| Window | Average monthly bill |
|---|---|
| Before solar | $175 |
| After solar (est.) | $50 — baseline service + non-offset usage |
| Monthly savings | $125 — before SREC income |
Post-solar bill is a conservative $50/month estimate covering the utility delivery charge and seasonal non-offset usage. Real-life results vary month to month with weather and household load.
Homeowner quote
“RECO interconnection happened in 10 business days — Chris had warned the other utilities take 6-8 weeks. That alone saved us a summer of bills.”
Notes from the project
David’s Mahwah install was the cleanest interconnection timeline I’ve ever run. RECO’s NJ Private Generation track turned around the PTO paperwork in 10 business days — call it half the timeline of PSE&G or JCP&L. That’s the territorial dividend I tell every Bergen / Passaic / Sussex client about when they’re choosing whether to pull the trigger on a summer install.
How I measure these numbers
- Production: pulled from the homeowner’s utility net-metering portal (export kWh out of the meter back to the grid + self-consumed kWh from a Sense / inverter API where available). Partial-year installs are annualized in 12-month windows starting at permission-to-operate (PTO).
- SREC payout: the homeowner’s NJ GATS account quarterly statement. Reported figure is the first full 12-month window post-registration. NJ SREC-II / ADI in Rockland Electric (RECO) territory.
- Predicted production: the NREL PVWatts v8 number we used in the original quote — same azimuth, tilt, and system loss inputs your installer would file with the utility.
- Before-bill: 12-month average from the utility account history pulled at intake. After-bill is an illustrative $50/month estimate covering delivery charges and non-offset usage; actual months vary with weather and household load.
- Privacy: ZIP3 only (never ZIP+4), first name only, photo only with the homeowner’s written permission.
Want Your Numbers Tracked This Way?
Every install I broker gets the same predicted-vs-observed tracking treatment. Run the calculator with me and I’ll show you what to expect from your roof.