Campsite Energy Storage System (ESS) 80 kWh — US Use Case & TCO

Verdict (15-year horizon, US campsite, evidence date 2026-01-15): NPV = −42,835 USD; simple payback = none; discounted payback = none; LCOS = 0.3460 USD/kWh (34.6 ¢/kWh). On cost-of-energy alone the build does not pay back — limit value rests on silent-night operation, generator-hour displacement, and outage resilience, which the cash-flow model does not monetize.

1. Equipment identification

This page is scoped to a real, publicly marketed equipment combination suitable for a US campsite microgrid. Substitutes of equivalent class are acceptable; the TCO model assumes one DC battery cabinet, one AC bidirectional PCS, and a UL 9540 system listing.

2. Inputs table (bounded model defaults)

Metric	Value
Equipment class	80 kWh LFP cabinet BESS + bidirectional PCS + BMS
Location	US campsite (hybrid PV + storage + genset)
Horizon	15 years
Discount rate (real)	5.00 %
Total undiscounted cost	USD 79,500.00
PV of costs	USD 69,601.09
Total undiscounted benefit	USD 37,986.34
PV of benefits	USD 26,766.04
NPV	USD −42,835.05
IRR	n/a
Simple payback	—
Discounted payback	—
LCOS	USD 0.3460 / kWh (34.6 ¢/kWh)

Function	Reference product (real, publicly marketed)	Public reference
Battery cabinet (LFP, ~80 kWh usable, DC)	CATL EnerC 215 kWh liquid-cooled LFP cabinet (scaled to 80 kWh usable per §1 inputs) — cell chemistry LFP, modular 51.2 V / 280 Ah packs	CATL EnerC product page
Cell-level chemistry supplier (alternate)	EVE Energy LF280K prismatic LFP cell, 280 Ah, 3.2 V nominal	EVE Energy LF280K product page
Bidirectional PCS / hybrid inverter	Sungrow SH5.0/6.0/8.0/10RT hybrid inverter (residential / light-commercial, 5–10 kW AC)	Sungrow SH RT datasheet page
String inverter (alternate for PV side)	Huawei SUN2000-6/8/10KTL-M1 hybrid-ready string inverter	Huawei SUN2000-6/8/10KTL-M1 product page
Module reference for PV side (model family)	LONGi Hi-MO 6 Explorer LR5-54HTH 415–440 W mono module	LONGi Hi-MO 6 Explorer product page
System-level safety listing (US)	UL 9540 (system), UL 1973 (cell/module), UL 9540A (thermal runaway test method)	UL 9540 catalog page (UL Standards & Engagement webstore); UL 1973 catalog page; UL 9540A catalog page
Siting standard	NFPA 855 (stationary ESS installation)	NFPA 855 catalog page (NFPA)
US NEC installation article	NEC Article 706 (Energy Storage Systems)	NFPA 70 (NEC) catalog page
UN transport standard	UN Manual of Tests and Criteria, Section 38.3 (UN 38.3)	UN Manual of Tests and Criteria (UNECE)

Parameter	Value	Source / classification
Site type	US campsite, hybrid PV + storage + genset	Tradvolt use-case profile
Usable battery capacity	80 kWh	Project requirement (model input)
Depth of discharge (DoD)	90%	NREL ATB 2024 — utility-scale battery storage cost & performance assumptions (PDF)
Round-trip efficiency (DC)	92%	NREL ATB 2024 — utility-scale battery storage RTE assumption
Cycle life to 80% capacity	6,000 cycles	EVE Energy LF280K product page: ≥6,000 cycles @ 80% DoD, 25 °C, 0.5 C/0.5 C (EVE LF280K datasheet)
Calendar life	15 years	Project horizon
Average daily load served by ESS	60 kWh/day	Tradvolt illustrative campsite load profile (model assumption)
Operating days per year	365	Continuous operation
Annual energy throughput	60 × 365 = 21,900 kWh/yr	Derived
Turnkey CapEx (battery + PCS + BMS + enclosure + install)	USD 50,000	Tradvolt assumption (see CapEx breakdown)
Annual O&M	USD 1,200/yr	Tradvolt assumption (model default)
Insurance adder	USD 300/yr	Tradvolt assumption (model default)
Augmentation reserve (year 10)	USD 5,000	Tradvolt assumption (model default)
Disposal / recycling reserve (end of life)	USD 2,000	Tradvolt assumption (model default)
Discount rate (real)	5.00 %	Tradvolt assumption (model default)

Explicit bounded defaults (model inputs the prior draft did not state — presented here as bounded assumptions, never as sourced facts):

residual_value.amount: 0 USD (asset fully depreciated by year 15; bounded assumption).
residual_value.year: n/a (no salvage value recognized in the base case; bounded assumption).
asset.ess.degradation_pct_per_year: ~1.7%/yr effective (consistent with 6,000-cycle cell rating at 0.75 cycles/day; bounded assumption applied to annual throughput in the cash-flow table).
asset.ess.charge_cost_per_kwh: 0.00 USD/kWh (solar-charged; bounded assumption — grid-charged scenarios would add an explicit charge cost).
asset.ess.value_per_kwh_discharged: 0.15 USD/kWh nominal (bounded assumption representing avoided genset diesel-LPG cost at US rural averages; declining ~1.7%/yr to reflect fuel-price risk premium).

CapEx breakdown (turnkey USD 50,000)

3. Computed TCO summary (authoritative — from audited model)

4. Year-by-year cash flow (authoritative — from audited model)

Line item	USD	Share
Battery cabinet (LFP modules + BMS)	32,000	64%
PCS / hybrid inverter (bidirectional)	9,000	18%
Enclosure, thermal mgmt, fire suppression	4,000	8%
Shipping, install, commissioning	4,000	8%
Soft costs (engineering, permitting, interconnect)	1,000	2%
Total	50,000	100%

TCO summary
Metric	Value
Currency	USD
Horizon (years)	15
Discount rate	5.00 %
Total undiscounted cost (USD)	79,500.00
Total discounted cost / PV of costs (USD)	69,601.09
Total undiscounted benefit (USD)	37,986.34
Total discounted benefit (USD)	26,766.04
NPV (USD)	-42,835.05
IRR	n/a
Simple payback (year)	—
Discounted payback (year)	—
LCOS (USD/kWh)	0.3460

Year-by-year cash flow
Year	Cost (USD)	Benefit (USD)	Net (USD)	Discount factor	Discounted net (USD)	Energy (kWh)
0	50,000.00	0.0000	-50,000.00	1.00	-50,000.00	0.0000
1	1,500.00	2,906.03	1,406.03	0.9524	1,339.08	21,842.73
2	1,500.00	2,847.91	1,347.91	0.9070	1,222.60	21,405.88
3	1,500.00	2,790.95	1,290.95	0.8638	1,115.17	20,977.76
4	1,500.00	2,735.13	1,235.13	0.8227	1,016.15	20,558.20
5	1,500.00	2,680.43	1,180.43	0.7835	924.90	20,147.04
6	1,500.00	2,626.82	1,126.82	0.7462	840.85	19,744.10
7	1,500.00	2,574.29	1,074.29	0.7107	763.48	19,349.22
8	1,500.00	2,522.80	1,022.80	0.6768	692.27	18,962.23
9	1,500.00	2,472.35	972.35	0.6446	626.78	18,582.99
10	6,500.00	2,422.90	-4,077.10	0.6139	-2,502.99	18,211.33
11	1,500.00	2,374.44	874.44	0.5847	511.27	17,847.10
12	1,500.00	2,326.95	826.95	0.5568	460.48	17,490.16
13	1,500.00	2,280.41	780.41	0.5303	413.87	17,140.36
14	1,500.00	2,234.80	734.80	0.5051	371.13	16,797.55
15	3,500.00	2,190.11	-1,309.89	0.4810	-630.08	16,461.60

Reading the table: Year-0 CapEx is the USD 50,000 turnkey cost. Years 1–9 and 11–14 carry USD 1,500 of annual fixed OpEx (O&M + insurance). Year 10 carries USD 6,500 (USD 1,500 OpEx + USD 5,000 augmentation reserve). Year 15 carries USD 3,500 (USD 1,500 OpEx + USD 2,000 disposal reserve). Benefits represent avoided genset runtime at the bounded USD/kWh_discharged assumption, declining with cell degradation. Discounted payback is — because the cumulative discounted net never crosses zero over the 15-year horizon.

5. LCOS formula and derivation

LCOS = PV(costs) ÷ Σ energy discharged over horizon
LCOS = 69,601.09 USD ÷ 201,176.43 kWh = 0.3460 USD/kWh (34.6 ¢/kWh).

Σ energy discharged over the 15-year horizon equals 201,176.43 kWh (sum of the "Energy (kWh)" column above). This denominator reflects annual throughput declining at the bounded ~1.7%/yr degradation assumption rather than the undiscounted 328,500 kWh used in the prior draft.

6. Sensitivity (qualitative, around the base LCOS = 34.6 ¢/kWh)

Each row holds all base-case inputs constant and varies only the named driver. Sensitivities below are illustrative — they do not regenerate the authoritative computed tables above.

7. Verdict by scenario

Driver	Low	Base	High	Indicative LCOS (¢/kWh)
Daily ESS throughput (kWh/day, base 60)	45	60	75	Lower daily throughput raises LCOS (utilization-dominated); higher throughput lowers it.
Turnkey CapEx (USD, base 50,000)	42,000	50,000	60,000	CapEx movements of ±20% shift LCOS by only ±3–4 ¢/kWh.
Discount rate r (real, base 5%)	3%	5%	8%	Higher discount rate compresses PV(OpEx) and modestly lowers LCOS.
Round-trip efficiency (DC, base 92%)	88%	92%	95%	Modest sensitivity; efficiency losses matter less than utilization.

Scenario	Direction of LCOS	Verdict
High-utilization campsite (75 kWh/day)	LCOS falls (utilization rises)	Strongest case. Storage displaces substantial genset runtime; ROI hinges on local diesel/LPG cost vs. avoided fuel.
Base case (60 kWh/day, 34.6 ¢/kWh)	Base	Borderline case. Defensible only if silent-night operation, generator-hour reduction, and outage resilience are valued — these are not monetized in the computed NPV.
Low-utilization campsite (45 kWh/day)	LCOS rises	Weak case. Consider downsizing to a 40–50 kWh cabinet or running a smaller genset + PV until load grows.
CapEx up (USD 60k)	LCOS rises ~3–4 ¢/kWh	Still defensible if fuel displacement and resilience benefits are monetized.
CapEx down (USD 42k, direct-import cabinet)	LCOS falls ~3–4 ¢/kWh	Strongest case — supports a clearer business case against incumbent diesel runtime.
High discount rate (8%)	LCOS falls modestly	CapEx-heavy projects are less hurt than OpEx-heavy ones by high discount rates.
Low RTE (88%)	LCOS rises ~1–2 ¢/kWh	Modest degradation; efficiency losses matter less than utilization.

Key insight: utilization (kWh/day served) dominates the LCOS. A 33% drop in throughput raises LCOS substantially; a ±20% CapEx movement shifts LCOS by only ±3–4 ¢/kWh. Because the base-case NPV is negative and payback is undefined within the 15-year horizon, the project is a resilience-and-noise investment, not an energy-cost investment, at the bounded assumptions used.

8. Mini certification & compliance block

Certifications and standards relevant to a US campsite 80 kWh BESS:

UL 9540 — Standard for Energy Storage Systems and Equipment (system-level safety listing). UL Standards & Engagement — UL 9540 catalog page.
UL 1973 — Standard for Batteries for Use in Stationary Applications (cell/module level). UL Standards & Engagement — UL 1973 catalog page.
UL 9540A — Test method for evaluating thermal runaway fire propagation (often required by AHJs for indoor / enclosed installations). UL Standards & Engagement — UL 9540A catalog page.
NFPA 855 — Standard for the Installation of Stationary Energy Storage Systems (US siting and spacing guidance). NFPA 855 catalog page.
IEEE 1547 — Standard for Interconnection of Distributed Energy Resources (relevant when the campsite interconnect interacts with a utility feed).
NEC Article 706 — National Electrical Code article on Energy Storage Systems (US installation baseline). NFPA 70 (NEC) catalog page.
UN 38.3 — Transport of lithium batteries (shipping compliance). UN Manual of Tests and Criteria (UNECE).

Confirm the final certified configuration with the chosen vendor and the local Authority Having Jurisdiction (AHJ) before procurement.

9. HS / HTS code block — US import classification

Common HS / HTS subheadings for lithium-ion BESS cabinets (US import):

8507.60 — Lithium-ion accumulators (cell/module level).
8504.40 — Static converters (PCS / bidirectional inverter, often classified separately).
8537.10 — Boards/panels for electric control (BMS and protection assemblies).
9405 / 9406 — Possibly applicable to enclosures depending on material and design.

Duty status: PENDING — verify with broker
How to verify (US importer workflow):

Confirm the exact HTS classification via the USITC HTS online search.
Request a binding ruling via the US CBP Customs Rulings Online Search System (CROSS) if classification is ambiguous.
Check applicable Section 301 tariffs (China-origin), Section 232 (steel/aluminum enclosures), and any Section 201 safeguards in effect at time of entry.
Confirm state-level sales/use tax and any utility-owned storage tariff exemptions.

Disclaimer: The above HTS subheadings are a starting point only. Tradvolt does not assert a duty rate, AD/CVD order applicability, or Section 301 status as fact. Always rely on a licensed customs broker and the official USITC / CBP sources for binding determinations.

10. Next steps

For procurement, plan a site assessment (load audit, sun-shade analysis, genset sizing, interconnection study) before sizing final kWh and PCS rating. Final torque, SOC-window, and DC-bus voltage limits must be confirmed against the chosen OEM manual revision at the time of PO.

Campsite Energy Storage System (ESS) 80 kWh — US Use Case & Total Cost of Ownership