Forest Lodge Orchard / “Electric Cherries” (Mike Casey) — merged dossier
Resolves RT_197 + RT_232; the NI full-electrification VALIDATION case
NZ’s (the world’s) first 100% electric, zero-fossil-fuel cherry orchard — 9 ha, ~9,300 UFO cherry trees, Central Otago. A near-complete real-world instance of the NI model: solar + battery + grid-backup, electric machinery, a borehole + summer drip irrigation (validating the D22 backstop + water↔electricity coupling), DER grid-export, heat-pump (SCOP ~5) and a high-performance worker dwelling. Operator an interviewee also founded Rewiring Aotearoa (OT_064/OT_066) → data is self-reported + advocacy-adjacent and figures evolve by vintage → data_quality medium. Full study dossier + interview-prep questions in the raw. See case page forest_lodge_orchard and Interviewee VIII [INT_008].
Summary
Forest Lodge Orchard (Mt Pisa, Central Otago; An interviewee + family) is run with zero on-site fossil fuel — every machine, pump, fan, vehicle and the family home is electric, powered by on-site solar + battery with a grid connection kept for backup and export. Casey’s central argument is that the biggest carbon and cost win is the fuel→electric switch itself, with solar+battery a smaller secondary saving — and that burning fossil fuel cannibalises the solar/battery payback. The energy system scaled in stages (23 kW PV in 2020 → 45 kW/120 kWh ~2024 → 160 kW/300 kWh by 2025), generating ~200 MWh/yr against ~100 MWh/yr use. Whole-farm operating cost fell from a modelled fossil 58,454 → grid-electric 23,341 → grid+solar/battery $5,910. The orchard is a high-density UFO (planar-cordon) system that needs ~2× a traditional orchard’s water (50–65k L/ha/day peak), drawn from a consented borehole via an 18.5 kW pump and drip lines — an irrigation load that matches solar generation. It is also a distributed energy resource: during the 9 Aug 2021 national grid emergency it exported stored power for 3–4 homes, and it uses wholesale/spot pricing + battery + lines-company (Aurora) flexibility to minimise cost. This dossier merges 11 of Casey’s own forestlodge.nz blog posts (2020–2025) with the EECA case study and NZ media.
Key claims
- claim: "Operation + electrification thesis. Forest Lodge Orchard (Mt Pisa, Central Otago) — 9 ha, ~9,300 cherry trees (5 varieties), high-density UFO planar-cordon; brand NZ Zero / Electric Cherries; markets Taiwan & Shanghai (Lunar New Year) + a boutique Auckland chain at ~15% premium. World's first 100% electric, zero-fossil-fuel cherry orchard. Owner Mike Casey also founded/CEOs Rewiring Aotearoa. CORE THESIS: the largest carbon + cost saving is the direct fuel→electric switch; the solar+battery is a smaller, secondary saving, and continuing to burn fossil fuel cannibalises the solar/battery payback. Whole-farm annual operating cost: fossil-fuel $58,454 → grid-electric $23,341 → grid+solar/battery $5,910 (ODT)."
source_location: "forestlodge.nz blog (renewable deep-dive); ODT; EECA; rt197 capture"
- claim: "Energy system — staged expansion (figures evolve by vintage; confirm current via int_008). 23.1 kW PV (2020, shed roof, ~$43k) → 45 kW PV + 120 kWh battery (~2024 blog; $216k solar+battery + ~$100k grid connection/switchboard/harmonics; 6 Victron Quattro inverters; BYD 48V LVL battery) → 160 kW PV + 300 kWh battery (2025 EECA/media). Generation ~200 MWh/yr ≈ 2× the ~100 MWh/yr consumption; 130 kVA grid connection KEPT for peak support + export (NOT islanded). Solar+battery payback ~8–9 yr (panels 25 yr, battery 10 yr); whole-electrification ~$150k up-front, ~8–9.5 yr at diesel $2.70/L, <2 yr with the 15% NZ Zero premium at full production. ⚠ wiki OT_064/OT_066 record the earlier 45 kW/120 kWh — treat as a dated timeline, do not overwrite."
source_location: "forestlodge.nz blog (renewable deep-dive, solar+irrigation); EECA; ourwayoflife; OT_064/OT_066"
- claim: "Electric machinery + frost protection (the 'electrify everything' load stack). Monarch e-tractor (ex-California, NZ's first, driver-optional; 75–80 hp equiv; 1.12 m wide for 2.25 m UFO rows; 10 hr/charge) → ~10,000 L diesel/yr and ~40 t CO2/yr displaced, charging ~$1,000/yr. Two 30 kW AGI electric frost fans (ex-South Africa, first outside SA; ~$62k + ~$15k install = $77k each) vs diesel fans (30–40 L/hr): 2021 EECA-funded season measured 119 frost hours, electric cost ~$621/fan vs >$7,000 diesel-equivalent, and a 97% carbon cut (0.7 t vs 25 t); incremental payback <2 yr. 18.5 kW bore pump; Mean Green ride-on mower ($19k); 40-yr electric forklift; 2 EVs; golf carts (<$100 maintenance / 5 yr). Frost-fan electricity is a spring-night peak load (~50% of period energy, ~67% of grid-take — no solar at night)."
source_location: "forestlodge.nz blog (tractor, frost fans, frost demo day, mowers); EECA"
- claim: "Water↔energy nexus + borehole (direct NI-model validation). UFO high-density orchards need ~2× a traditional orchard's water (planar canopy intercepts 20–30% more light → proportionally more water; young orchards more again — Greg Lang, Michigan State; Plant & Food Research planar-cordon study). Peak demand 50,000–65,000 L/ha/day, up to ~390,000 L/day whole orchard → near-around-the-clock summer irrigation. Supplied from a CONSENTED borehole (struck water first attempt; Central Otago DC accepted the UFO-higher-water argument; efficient drip + renewable focus helped allay over-allocation concern) via a 15–18.5 kW submersible pump and 2.3 mm drip lines. Irrigation is a DAYTIME load that matches solar — 'the near-perfect use case'; replacing a diesel pump pays back ~4–6 yr. This validates the model's D22 borehole backstop, the water↔electricity pump-energy coupling, and irrigation-as-summer-demand."
source_location: "forestlodge.nz blog (UFO water, solar+irrigation)"
- claim: "DER / grid flexibility + buildings. During the 9 Aug 2021 national grid emergency (record >7,000 MW; Transpower-ordered load-shedding) Forest Lodge EXPORTED stored battery power (~15 kWh / 2 hr ≈ 3–4 homes) while staying 25% charged — Casey argues grid-support should be rewarded like generation (DER as revenue + reliability). Uses wholesale/spot pricing + battery + Aurora lines-company flexibility (import off-peak, export at peak) to cut line charges; rule of thumb 'cheaper to add panels than batteries — use the grid as a battery' where a connection exists. Home heat: diesel boiler + gas → Stiebel Eltron air-to-water heat pump + cylinder + induction (~$30k; seasonal COP ~5; displaced ~$5k/yr diesel). Worker housing: Flexi House panelised unit, 1.29 ACH air-tightness (vs 7–9 standard), single 4.2 kW heat pump — validates the building_standard passive-house lever. ⚠ SCOP 5 + ACH 1.29 are self-reported premium figures; NI cop_air=4.0 is more conservative."
source_location: "forestlodge.nz blog (DER, underfloor heating, accommodation); cf. RT_235 (Aurora CPD, OT_066)"Neobiome Intelligence relevance
The single best real-world validation case for the whole NI model (resolves the RT_232 validation worked-example intent). Forest Lodge is, in effect, a built instance of the model’s design space — and it stress-tests the assumptions the model just adopted:
- Electricity (D01): PV + battery + grid-backup (FL kept its connection — a live data point for the A2 grid-vs-off-grid call: at a short grid distance the rational choice is grid-backup, not islanding). Import/export economics, wholesale-spot pricing, and DER flexibility map onto D18 + RT_235.
- Water (D03): a real borehole + 18.5 kW pump + consent + summer drip — direct validation of the D22 borehole backstop, the water↔electricity pump-energy coupling, and irrigation-as-summer-demand matching solar.
- Mobility/machinery (D05): the electrify-everything load stack (tractor, fans, pump, mower, EVs) — the demand side of full electrification.
- Food (D02): UFO high-density orchard economics, water intensity, and the NZ Zero price-premium that flips the payback.
- Heat/buildings (D04, cross-ref): heat-pump SCOP ~5 (vs NI’s cop_air 4.0) and Flexi House 1.29 ACH (the passive-house
building_standardlever).
Use as a ±20% validation candidate. Caveat: self-reported, advocacy-adjacent (Casey founded Rewiring Aotearoa), figures vintage-dependent.
Research targets
Research gaps
- Current (2026) confirmed solar/battery capacity + the staged build history — reconcile 45 kW/120 kWh (OT_064/066) vs 160 kW/300 kWh (2025) → int_008.
- Whether the Aurora flexibility/CPD reward is realised revenue (~$1.50/kWh peak, ~80 hr/yr) — RT_235 (advanced, not closed here; the exact tariff sits in OT_066).
- The islanding threshold — at what grid distance/cost would full off-grid beat grid-backup (the A2 question) → int_008.
Connections
Links to
Cases (1): Electric Cherries
Referenced by