Verdict (base case, 10-yr, 6% real): NPV = -80,495 AUD; LCOS = 0.5039 AUD/kWh; simple payback = none; discounted payback = none. Equipment: CATL EnerC 100 kWh cabinet (LFP) paired with Sungrow SH15/20T hybrid inverter. Location: Australia, NSW small-business tariff example. Horizon: 10 years. Evidence date: 2026-02-14. Limitation: no OEM certification evidence has been independently verified on this page; see the standards block below.
| Metric | Value |
|---|---|
| NPV (AUD) | -80,495.00 |
| LCOS (AUD/kWh) | 0.5039 |
| Simple payback (year) | — |
| Discounted payback (year) | — |
| IRR | -0.2314 |
| PV of costs (AUD) | 109,369.39 |
| PV of benefits (AUD) | 28,874.40 |
| Metric | Value |
|---|---|
| Currency | AUD |
| Horizon (years) | 10 |
| Discount rate | 6.00 % |
| Total undiscounted cost (AUD) | 114,709.50 |
| Total discounted cost / PV of costs (AUD) | 109,369.39 |
| Total undiscounted benefit (AUD) | 38,892.99 |
| Total discounted benefit (AUD) | 28,874.40 |
| NPV (AUD) | -80,495.00 |
| IRR | -0.2314 |
| Simple payback (year) | — |
| Discounted payback (year) | — |
| LCOS (AUD/kWh) | 0.5039 |
The reference scenario is not bankable on energy arbitrage + flat 8 kW demand shave alone at AU small-business tariff levels. The base case is NOT RECOMMENDED on economics alone. Adding a defensible Value-of-Lost-Load (VoLL) for fermenter temperature excursions is required to flip the conclusion (see Section 6).
A 100 kWh nameplate behind-the-meter (BTM) lithium-iron-phosphate (LFP) BESS is paired with a Sungrow SH-series hybrid inverter. The system is sized to (a) time-shift refrigeration compressors away from the shoulder-peak window, (b) cap the site's monthly maximum demand, and (c) ride through short utility events to protect fermenter temperature stability. The reference brewery operates a 6 kW cold room, a 12 kW glycol chiller, and a 12 kW electric steam generator for the brewhouse; the load is steady with two daily compressor cycling peaks.
| # | Item | Model / family | Edition | Public source (URL) |
|---|---|---|---|---|
| 1 | BESS cabinet (LFP) | CATL EnerC 100 kWh | EnerC family product page (current) | https://www.catl.com/en/ess/ — CATL energy-storage landing (model specifications confirmed at RFQ stage). |
| 2 | Hybrid inverter | Sungrow SH5/6/8/10/12T (three-phase hybrid, 400 V) | Current maker datasheet | https://www.sungrowpower.com/en/products/residential-energy-storage-system/sht-5-6-8-10-12 — SH5/6/8/10/12T product page (specifications confirmed at RFQ stage). |
| 3 | Battery management (referenced) | CATL-internal BMS, EnerC family | — | Same CATL landing page as row 1. |
The CATL EnerC cabinet ships as a 100 kWh nameplate LFP module with integrated thermal management and BMS; published specifications are taken from the CATL EnerC family page. The Sungrow SH5/6/8/10/12T is the matching Australian-listed three-phase hybrid commonly paired with this class of LFP cabinet in residential and small-commercial installs; the linked product page documents the AC-side parameters applicable to this class. Confirm specific torque values, SOC window and DC voltage limits against the inverter's OEM installation manual at RFQ stage.
| # | Input | Value | Unit | Named source / classification |
|---|---|---|---|---|
| 1 | BESS nameplate | 100 | kWh | CATL EnerC landing (EnerC 100 kWh cabinet). |
| 2 | Depth of discharge (DoD) | 96 | % | Model assumption (bounded) — recommended operating DoD for the EnerC family; confirm against the OEM datasheet at RFQ. |
| 3 | Round-trip efficiency (AC-AC, system) | 92 | % | Model assumption (bounded) — inverter peak efficiency 98.0% per the SH5-12T product page; system AC-AC with LFP cabinet ~92% including auxiliaries. |
| 4 | Calendar degradation y1 / y2..y10 | 2.5 / 1.8 | %/yr | Model assumption (bounded) — consistent with the EnerC 10-year performance warranty framing at CATL EnerC. |
| 5 | Capex (turnkey, AU) | 95,000 | AUD | Model assumption (bounded) — low band of published AU installer quote band, 2025-26. |
| 6 | Fixed O&M y1 (escalating 2%/yr) | 1,800 | AUD/yr | Model assumption (bounded) — standard AU service-contract template value. |
| 7 | AU small-business shoulder-peak tariff (NSW example) | 0.34 | AUD/kWh | Model assumption (bounded) — NSW small-business shoulder band, billed period 2025-Q4; verify against an Ofgem retail-market indicator methodology or an AER benchmark at RFQ. |
| 8 | AU small-business off-peak tariff | 0.18 | AUD/killed | Model assumption (bounded) — NSW small-business off-peak band, billed period 2025-Q4. |
| 9 | Demand charge (NSW example, $/kW/month) | 22.10 | AUD/kW/mo | Model assumption (bounded) — relevant DNSP schedule, 2025-26. |
| 10 | Cycles per year (1 cycle/day, 330 operating days) | 330 | cycles/yr | Model assumption (bounded) — reference brewery BTM operating profile. |
| 11 | kW shaved from peak | 8 | kW | Model assumption (bounded) — reference load study. |
| 12 | Discount rate (real, after-tax) | 6 | %/yr | Model assumption (bounded) — business investment rate band, Feb 2026. |
| 13 | Analysis horizon | 10 | years | Aligned with the CATL EnerC 10-year performance warranty framing at CATL EnerC. |
| 14 | Residual value (amount) | DROPPED-ITEM | AUD | Model assumption (bounded) — explicit input was dropped; treated as zero in the computed table. |
| 15 | Residual value (year) | DROPPED-ITEM | year | Model assumption (bounded) — explicit input was dropped; no terminal cash flow applied. |
| 16 | Replacement capex (year 10) | DROPPED-ITEM | AUD | Model assumption (bounded) — explicit replacement was dropped; only fixed O&M is escalated. |
| 17 | Charge cost per kWh | DROPPED-ITEM | AUD/kWh | Model assumption (bounded) — explicit charge cost was dropped; charging is absorbed in the off-peak tariff. |
| 18 | Value per kWh discharged | DROPPED-ITEM | AUD/kWh | Model assumption (bounded) — explicit per-kWh benefit rate was dropped; benefit is computed from the shoulder-minus-off-peak spread and the demand-charge rate. |
Rows 5, 6, 10, 11, 12 and 14-18 are bounded model assumptions; no citable, dated, single-source AU installer quote for a turnkey CATL EnerC 100 kWh + Sungrow SH-T system was located on the public web at draft time. Treat the capex band as low-to-mid for AU small-commercial 2025-26. All other rows link to a specific public page.
Inputs held: capex 95,000 AUD; r = 6%; O&M y1 = 1,800 AUD (escalates 2%/yr); degradation 2.5% y1 then 1.8%/yr. Cells are reproduced verbatim from the scenario TCO model; do not re-round.
| Year | Cost (AUD) | Benefit (AUD) | Net (AUD) | Discount factor | Discounted net (AUD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 95,000.00 | 0.0000 | -95,000.00 | 1.00 | -95,000.00 | 0.0000 |
| 1 | 1,800.00 | 4,214.82 | 2,414.82 | 0.9434 | 2,278.13 | 31,680.00 |
| 2 | 1,836.00 | 4,138.95 | 2,302.95 | 0.8900 | 2,049.62 | 31,109.76 |
| 3 | 1,872.72 | 4,064.45 | 2,191.73 | 0.8396 | 1,840.22 | 30,549.78 |
| 4 | 1,910.17 | 3,991.29 | 2,081.12 | 0.7921 | 1,648.44 | 29,999.89 |
| 5 | 1,948.38 | 3,919.45 | 1,971.07 | 0.7473 | 1,472.90 | 29,459.89 |
| 6 | 1,987.35 | 3,848.90 | 1,861.55 | 0.7050 | 1,312.32 | 28,929.61 |
| 7 | 2,027.09 | 3,779.62 | 1,752.52 | 0.6651 | 1,165.53 | 28,408.88 |
| 8 | 2,067.63 | 3,711.58 | 1,643.95 | 0.6274 | 1,031.43 | 27,897.52 |
| 9 | 2,108.99 | 3,644.77 | 1,535.79 | 0.5919 | 909.03 | 27,395.36 |
| 10 | 2,151.17 | 3,579.17 | 1,428.00 | 0.5584 | 797.39 | 26,902.25 |
Sign convention: positive Benefit values represent energy + demand-charge savings (positive cash inflow). PV of benefits = sum of discounted Benefit columns = 28,874.40 AUD, which reconciles to the summary table above.
Applicable standards (edition must be verified against the certificate, not inferred from brochures):
Conformity assessment: where IECEE CB scheme is invoked, evidence is the CB Test Certificate reference plus the issuing NCB (e.g., TÜV Rheinland, TÜV SÜD, DEKRA, Intertek, SGS). For other IEC standards not listed above, use the IEC Webstore catalogue and cite the full designation (IEC NNNN:YYYY) plus edition in the text; do not invent /publication/ identifiers. AS/NZS compliance is evidenced by a JAS-ANZ-accredited certification body's certificate or a Clean Energy Council listing for the Australian market.
No certification claimed on this page. The CATL EnerC 100 kWh cabinet and the Sungrow SH5-12T inverter are public products; this page does not assert that either carries a current IEC 62619, IEC 63056, IEC 62109-1/2, UL 1973, NFPA 855 or CEC battery listing for AU. Request the certificate number and NCB from the supplier at RFQ stage and verify it against the IECEE CB public register and the CEC approved-inverter list before procurement.
The three verdict rows below labelled PENDING are illustrative ranges: the escalation, shave and VoLL formulas are stated, but the underlying tariff-escalation path and VoLL value are not yet tied to a single citable public source. They are not the computed base case and must not be used for a procurement decision without a site-specific tariff quote and a defensible VoLL figure.
| Scenario | Formula | 10-yr NPV (illustrative) | Verdict |
|---|---|---|---|
| Pure arbitrage + 8 kW demand shave (base) | computed table in section 4 | -80,495 AUD | NOT RECOMMENDED on economics alone |
| Arbitrage + 8 kW shave + 2%/yr tariff escalation (PENDING) | P_shoulder_y = 0.34 x 1.02^y; P_offpeak_y = 0.18 x 1.02^y; recompute V_E_y each year, keep V_D flat | approx. -38,000 AUD (PENDING illustrative) | MARGINAL; revisit with site tariff |
| Arbitrage + 15 kW shave + 2%/yr tariff escalation (PENDING) | As above with kW_shaved = 15; V_D = 15 x 22.10 x 12 = 3,978 AUD/yr | approx. -12,000 AUD (PENDING illustrative) | BORDERLINE; revisit with site tariff |
| Adds avoided outage cost: 4 events x 4 h x 12 kW x AUD 8/kWh VoLL (PENDING) | Add VoLL benefit = 4 x 4 x 12 x 8 = 1,536 AUD/yr undiscounted across years 1-10 | approx. +6,000 AUD (PENDING illustrative) | VIABLE when resilience is monetised, but only with a defensible VoLL value |
The base design r9 (CATL EnerC 100 kWh + Sungrow SH-T) is not bankable on energy arbitrage + flat 8 kW demand shave alone at AU small-business tariff levels under the cited inputs. A defensible Value-of-Lost-Load figure for the brewery's fermenters flips the conclusion; that figure must be site-specific, dated, and citable.
Likely HS subheading (Australia): 8507.60 — Lithium-ion accumulators (separable, with or without rectangular outer casing). Reference lookup: Australian Border Force (current edition Working Tariff) and the USITC Harmonized Tariff Schedule search for the harmonized text.
Lookup instructions:
Duty rate: PENDING — look up as instructed; this page does not assert a rate as fact.
Disclaimer: Customs classifications and duty rates change. The above is reference information, not legal or customs advice. Consult a licensed customs broker and the Australian Border Force for binding rulings.
Request a formal RFQ for the CATL EnerC + Sungrow SH-T reference design
No "verified supplier" badge, No.1 ranking, customer review score, or logo wall is shown on this page. No reviews are invented or aggregated. The product names cited (CATL EnerC, Sungrow SH5-12T) are real, publicly marketed models; verify each certification claim with the issuing body before procurement.