Sources: CR_034 (merged dossier) · OT_064 · OT_066 · operator Interviewee VIII [INT_008]
Overview
Forest Lodge Orchard (Mt Pisa, Central Otago) is the world’s first 100% electric, zero-fossil-fuel cherry orchard — 9 ha, ~9,300 cherry trees grown as high-density UFO (Upright Fruiting Offshoot) planar cordon, marketed as NZ Zero / Electric Cherries. Every machine, pump, fan, vehicle and the family home runs on electricity from an on-site solar + battery system, with a grid connection kept for backup and export. Operator Mike Casey is also founder/CEO of Rewiring Aotearoa, the electrification-advocacy NGO behind OT_064 and OT_066 (the latter, Electric Farms, co-authored by Casey). For NI this is the single best end-to-end validation case — a built instance of nearly the whole model. CR_034
Energy system (a dated timeline)
| Vintage | Solar | Battery | Capex | Note |
|---|---|---|---|---|
| 2020 | 23.1 kW | — | ~$43k | shed-roof, irrigation start |
| ~2024 | 45 kW | 120 kWh | 216k solar+batt + ~100k grid upgrade | 6 Victron Quattro; BYD 48V LVL |
| 2025 | 160 kW | 300 kWh | — | EECA/media |
Generation ~200 MWh/yr ≈ 2× the ~100 MWh/yr used; 130 kVA grid kept for peak support + export (not islanded). CR_034
The electrification economics
- Whole-farm operating cost: fossil
58,454 → grid-electric23,341 → grid+solar/battery $5,910. The dominant saving is the fuel→electric switch; solar+battery is secondary; burning fossil fuel cannibalises the solar payback. CR_034 - Solar+battery payback ~8–9 yr (~
25k/yr saved); whole-electrification **~150k** up-front, <2 yr payback once the 15% NZ Zero premium lands at full production. CR_034
Electric machinery & frost protection
- Monarch e-tractor (NZ’s first, driver-optional, 75–80 hp equiv) → ~10,000 L diesel + ~40 t CO₂/yr displaced. CR_034
- 2× 30 kW AGI electric frost fans (vs diesel 30–40 L/hr): 2021 EECA-funded season = 119 frost hours, ~
621/fan vs >7,000 diesel, 97% carbon cut, <2 yr incremental payback. Frost-fighting is a spring-night peak load (no solar). CR_034 - Plus 18.5 kW bore pump, electric mower ($19k), 40-yr electric forklift, 2 EVs, golf carts. CR_034
Water↔energy nexus (⭐ validates the D22 build)
- UFO high-density needs ~2× a traditional orchard’s water (planar canopy intercepts 20–30% more light); peak 50–65k L/ha/day, up to ~390k L/day whole orchard. CR_034
- Supplied from a consented borehole (struck water first try; Central Otago DC accepted the higher-water argument; efficient drip + renewable focus eased over-allocation concern) via a 15–18.5 kW pump + 2.3 mm drip. CR_034
- Irrigation is a daytime load that matches solar — “the near-perfect use case”; diesel-pump replacement pays back ~4–6 yr. Directly validates the NI borehole backstop + water↔electricity pump coupling + irrigation-as-summer-demand. CR_034
DER, heat & buildings
- DER: during the 9 Aug 2021 grid emergency, exported ~15 kWh/2 hr (3–4 homes) while 25% charged; uses wholesale/spot + battery + Aurora flexibility (import off-peak, export peak). “Cheaper to add panels than batteries — use the grid as a battery.” CR_034
- Heat: home retrofit to Stiebel Eltron air-to-water heat pump + cylinder + induction (~
30k, **seasonal COP ~5**, displaced ~5k/yr diesel). CR_034 - Building: Flexi House worker unit — 1.29 ACH (vs 7–9 standard), single 4.2 kW heat pump → the passive-house
building_standardlever in the flesh. CR_034
interviewee account (int_008, 16 Jun 2026)
an interviewee was interviewed for the project (Interview VIII [INT_008]). Key additions/confirmations beyond the dossier:
- 300 kWh battery confirmed on record (~
600/kWh, ~170k; field-day prices now ~$350/kWh; 15–20 yr life). Solar kW not stated in the interview (the 160 kW stays from the public case studies). Interview VIII [INT_008] - The economics: generates at ~
0.07/kWh; a ~50k diesel bill became a ~25k **export revenue** stream; grid all-in ~0.40/kWh vs ~0.11 mortgage-financed rooftop solar; diesel1.50–2.00/kWh. Interview VIII [INT_008] - Off-grid is uneconomic for the site — loses export revenue and needs ~$1M of batteries to cover frost; frost-fighting is the binding constraint (90 kW load vs 300 kWh = ~3 h backup; frost lasts up to 10 h). Grid kept as export earner + frost backstop + crop insurance. Interview VIII [INT_008]
- Batteries are resilience, not arbitrage; the dominant economic win is the diesel→electric switch, which the off-grid framing wrongly merges with grid-cost and self-generation.
- ⚠ Irrigation runs 24/7, not daytime-shifted — corrects the “solar-matched irrigation” reading.
- Hardest machine = the self-imported electric tractor (maker since bankrupt → unsupported). Biggest barrier to electrifying NZ = finance access + literacy, not capex. Interview VIII [INT_008]
Relevance to Neobiome
The model’s ±20% validation candidate (spec §7). Forest Lodge instantiates D01 (PV+battery+grid-backup+DER), D03 (borehole+irrigation), D05 (electric machinery), D02 (orchard economics + price premium) and D04 (heat pump + high-performance envelope) at once. It is the empirical test of the model’s grid-vs-off-grid call, water↔energy coupling, and electrification value-stack. Caveats: self-reported, advocacy-adjacent, vintage-dependent figures. CR_034
Open questions
- Current confirmed capacity + staged build history (45/120 vs 160/300)?
- At what grid distance/cost would full islanding beat grid-backup? (the A2 question)
- Is the DER/flexibility reward realised revenue, or notional?
- How binding was the water consent — would over-allocation have stopped the project?
Connections
Links to
Referenced by