Monthly Utility Usage — Jun 2025 to May 2026
Electric consumption (kWh), peak demand (kW), and billed charges ($)
Blended rate = total electric bill ÷ metered kWh for the same billing period. Summer rates are higher because fixed demand charges spread over far fewer kWh. Off-peak demand includes the 68%-of-peak minimum charge.
Electric Bill Breakdown — Rate ETL (Electric Frozen Commercial)
Charge composition and on-peak vs. off-peak energy split for the two confirmed electric-only billing periods
Mar 12–Apr 10 (30 days) and Apr 11–May 11 (31 days) billing periods. Demand charges calculated on measured peak kW during on-peak hours.
15-Minute Building Load with EV Charger Overlay — Jun 8–16, 2026
CSU meter readings vs. estimated ChargeLab EV charger contribution per port (DQ-424, 433, 434, 435)
EV charger kWh from actual 15-min interval data (ChargeLab report Jun 8–16). CSU meter data covers Jun 8–16 (download cutoff Jun 17). Times shown in MT (Mountain Time).
EV Charger Sessions — Jun 8–16, 2026
ChargeLab session timeline, kWh by day, and session-level detail across all 4 ports
Sessions with 0 kWh (connect-only/cancelled) excluded from scatter. Times shown in MT (Mountain Time).
EV Charger Demand Impact & Throttle Sensitivity
Additional demand charges from chargers at full power (12 kW) and throttled to 9 kW and 6 kW — on-peak and off-peak scenarios
How reducing max charger output (12 → 9 → 6 kW) reduces monthly demand charges for 1–4 simultaneous chargers
Demand charge = peak simultaneous charger kW × rate × days. On-peak: $0.8954/kW/day. Off-peak (kW/XOF): $0.582/kW/day. 30-day billing period assumed. Charger kW from actual 15-min interval data; simultaneous count based on session plug-in windows.
EV Charger Pricing Analysis
Cost structure, demand coincidence, and recommended tenant pricing based on Jun 8–16 interval data
On-peak window (summer): 11am–6pm Mon–Fri. Demand charges are measured and billed independently for on-peak and off-peak windows.
On-peak window shaded (11am–6pm Mon–Fri). Charger load stacked on building baseline.
On-peak billing demand peak: 47.9 kW building + 12.6 kW charger = 60.5 kW combined (Jun 8, 5:45pm). Off-peak billing demand peak: 50.3 kW building + 6.2 kW charger = 56.5 kW combined (Jun 8, 6:15pm). Chargers were active in 52% of on-peak 15-min intervals.
Observed cost uses actual charger kW at billing demand peaks. Worst case assumes 3 chargers × 6.5 kW = 19.5 kW simultaneous. On-peak demand allocated to 11am–6pm kWh; off-peak demand spread across all remaining kWh (weekends included).
Revenue and net figures are after CMS fees ($0.30/session + 2.9% of gross). Energy and demand costs are shown separately. Utilization projected from 9-day sample (5.7 sessions/day). On-peak demand adder ($0.43/kWh) allocated to 11am–6pm window only; off-peak demand adder allocated to 6pm–9pm window only. Real off-peak and weekend reflect energy cost only.
Section 7
Cost Calculation Breakdown
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Cost Calculation Breakdown
Step-by-step derivation of observed and worst-case true costs per window. All figures based on Jun 8–16 ChargeLab + CSU interval data scaled to 30-day month.