Convention Center 2 MWp Solar + BESS — Use-Case & TCO (US)

Verdict (computed, model-locked): A 2,000 kWp DC rooftop PV array plus a 1 MW / 2 MWh BESS retrofit on a US convention center, evaluated over a 25-year horizon at a 7.00% discount rate, returns NPV = USD 1,209,481.81, simple payback = 9.14 years, discounted payback = 14.57 years, and LCOE = USD 0.1222 / kWh. Equipment family: LONGi Hi-MO 5 / Hi-MO 7 series PV modules, Sungrow SG125CX / CX-P2 string inverters, CATL EnerC-plus liquid-cooled LFP BESS. Location class: mid-South / mid-Atlantic US commercial site (180,000 ft² exhibit hall, M–Fri daytime HVAC + lighting peak). Evidence date: 2026-09-22 (scenario model run). Limitation: All tax-equity, customs classification, and tariff inputs are buyer-action items; see Section 6.

Decision Table — Headline Metrics (computed)

1. Equipment Family & Inputs (cited where possible; explicit bounded defaults otherwise)

2. Computed TCO Summary (verbatim from scenario model)

3. Year-by-Year Cash Flow (verbatim from scenario model)

Reconciliation note: the year-15 cost spike (USD 211,349.97 vs. ~USD 44,640 baseline) is the inverter-replacement event scheduled at 0.10 USD/Wac on the 1,667 kWac AC nameplate (166,700 USD undiscounted). At a 7.00% discount rate, its discounted contribution is 166,700 / (1.07)¹⁵ = 166,700 / 2.7590 ≈ USD 60,420 (R3).

4. Sensitivity (qualitative; computed table above holds for base case)

The computed base case (Section 2) is locked: LCOE = USD 0.1222/kWh, simple payback = 9.14 yr, discounted payback = 14.57 yr. Sensitivity drivers that move the headline figures and that the buyer must re-run in their own workbook:

• CapEx ±: PV modules and BoS+EPC line items (combined 1.06 USD/Wp gross). A +20% CapEx shock raises LCOE roughly +15% and extends simple payback toward ~11 yr; a −15% shock compresses LCOE and simple payback proportionally.
• Tariff shift: Blended retail tariff (0.145 USD/kWh, 2.5%/yr inflation) and export / NEM rate (0.095 USD/kWh) drive benefit. A −15% blended tariff compresses lifetime benefit and extends payback by ~3 yr; LCOE (cost-side metric) is unchanged.
• Degradation: 0.5%/yr is the model default. Moving to 0.7%/yr reduces lifetime generation and extends payback; moving to 0.3%/yr improves it.
• Discount rate: Base case 7.00%. +100 bps compresses NPV and extends discounted payback; −100 bps expands both.
• Tax credits: The base-case figures in Section 2 are pre-ITC. Section 6 lists the buyer lookup path; do not double-count ITC and bonus depreciation in this model.

The COMPUTED TABLES in Sections 2 and 3 are the only computed numbers on this page. Recompute every sensitivity cell from the formulas in the computed workbook before issuing a PO.

5. Cert / Standards Checklist (buyer-action, NOT a compliance assertion)

None of the following lines assert that any specific shipment is certified. Each item is a buyer-side checklist line: confirm issuer + certificate number against the BOM and the EPC at RFQ award.

6. Buyer Lookup Block — HS Codes, Duties, Tariffs, Tax (NOT asserted as fact)

The following lines are lookup paths, not duty or rate assertions. Rates are fact-sensitive by country of origin, FTA, Section 301 status, and binding CBP rulings. Confirm with a licensed customs broker before entry.

7. CTA

Request a sealed RFQ — Convention Center 2 MWp PV + 1 MW / 2 MWh BESS

Disclaimer: Tradvolt publishes models for procurement decision support. Items labelled "buyer-action" or "lookup" must be confirmed by the buyer against site conditions, utility tariff, customs classification, and tax structure. The COMPUTED TABLES in Sections 2 and 3 are the only computed numbers on this page. None of the figures here constitute investment, tax, customs, or engineering advice. Recompute every cell in your own workbook before issuing a PO.