⚑ ALT-AEMOAn adversarial read of the consumer-energy endgame · 2026 → 2035
One side owns the sunlight. The other owns the bill.
Grid vs. Household — the silent war for energy sovereignty
The official story is that solar households shift costs onto everyone else, so network bills must become fixed charges. The adversarial read: the real cost rocket is $35B+ of transmission overruns landing in the regulated asset base around 2030 — and fixed-charge reform conscripts the households who can't defect to pay for wires the households who can are rationally fleeing. This page maps that war: the economics of leaving, the time-bomb in the network, and the two-grid country it produces by 2035.
Defection payback · 2026 → 2035
24–33 yr → ~2 yr
leaving the grid goes from irrational to a no-brainer.
Fixed charge by 2035 · NEM capitals
up to $1,142/yr · 2.8×
driven by the transmission RAB, not by solar.
Households who can't enlist
2.9M
renters — ~4% have solar. They hold the line and the bill.
Jump to section
01
The frontline: two combatants, one revenue pool
a structural conflict, not a moral one
Both sides are behaving rationally inside their own rules. The grid is a $100B+ sunk asset that must recover its cost from whoever stays connected. The capital-equipped household has, for the first time in NEM history, a cheaper option than staying. The collision is mechanical — and it is decided by which way the fixed-charge knob is turned.
Combatant A · the incumbent
THE GRID
TNSPs · DNSPs · the regulated asset base
Needs
Throughput. Revenue is a fixed cap recovered per kWh delivered — fewer kWh means a higher price on each one.
Weapon
Fixed daily charges. Shift cost recovery off the meter and onto the connection itself — you pay to be attached, used or not.
Fatal weakness
$35B+ of transmission overruns it must still recover — and a customer base it is actively giving a reason to leave.
CONTESTED · FIXED CHARGE
Combatant B · the insurgent
THE HOUSEHOLD · but only the Haves
solar · battery · EV · V2H — the capital-equipped (see tab 02)
Needs
Three cloudy winter days of autonomy. By 2035 a 45 kWh battery plus an EV clears it in every capital.
Weapon
Exit. The marginal cost of full defection falls to ~$3,500 (switchgear + a V2H charger) once the battery is already there.
Fatal weakness
It requires a roof and capital. 2.9M renters can never enlist — and inherit the bill the leavers escape.
⚑ The alt-AEMO thesis
The war is framed as solar households vs everyone else — a cost-shifting morality tale that justifies fixed charges. But strip the framing and the arithmetic points elsewhere: the dominant force lifting fixed charges this decade is not rooftop solar, it is transmission cost overruns of 90–500% capitalised into the RAB and recovered for thirty years. Fixed-charge reform doesn't resolve that conflict. It chooses a side — and bills the side that can't leave.
02
There aren't two sides. There are three.
the household splits in two
The "Household" in this war is not one army. It is two populations whose interests are directly opposed — and the line between them was drawn by a single thing: who could access a public subsidy. The grid is merely the ground they fight over. Call them the Haves and the Have-Nots.
The uncomfortable part: the Haves' independence was paid for by the Have-Nots. Solar rebates, the battery program, the EV tax break, the green-finance concessions — all funded from the same tax and tariff base the non-adopters disproportionately fill. Public money built private balance sheets. Now those balance sheets want to stop paying for the grid.
The Haves · asset-owning households
☀ Roof · 🔋 Garage · 🚗 Driveway
solar PV, battery storage, an EV for V2G / V2H
Got there with
Taxpayer grants — SRES, Cheaper Home Batteries ($7.2B), the EV FBT exemption ($1.4B → $3B/yr), ARENA, CEFC concessional finance.
Now enjoys
Cheap-to-"free" power, plus a +$23,107 average lift in property value — captured by owners alone.
Now wants
To stop paying for the poles, wires and transmission it barely draws on — and is one switchgear upgrade from leaving entirely.
The Have-Nots · grid-dependent households
No roof · No rebate · No exit
2.9M renters, apartments, low-income · ~4% have solar
Paid for it
Supplied an estimated 60–70% of the subsidy pool through income tax, GST and volumetric network levies.
Captured
0% of the private-asset upside. No bill cut, no property lift, no FBT break — barred by tenure and employment type.
Now inherits
The full transmission RAB — the bill the Haves are walking away from, recovered over thirty years from whoever stays.
"Non-adopters function as involuntary venture capitalists — de-risking private balance-sheet upgrades they are themselves structurally barred from making."
Reverse Wealth Transfer framework, 2026
The reverse flow · who pays in vs who is paid out
The Have-Nots fill most of the subsidy pool through tax, GST and the levy on every power bill — then almost none of it flows back to them. The thick strand crosses the gap and lands on the Haves' balance sheets.
Strand widths are proportional and illustrative — contribution shares (~60–70% of pool liquidity from non-adopters) and the 0.86% Community Solar coverage are from the source syntheses; the pool is not literally re-identified by contributor, the flow shows net incidence.
Reverse Wealth Transfer Index
15–30%
of a non-adopter household's discretionary energy spend is, in net terms, a transfer to asset-owning households. Indicative scale, not a precise figure — but the direction is unambiguous and it widens through 2028.
The sharpest vector · EV FBT exemption
The benefit scales with the marginal tax rate avoided — so it is regressive by construction. On the same $60,000 vehicle:
~$12k
saving for a median earner ($73k)
~$25k
saving above $190k income
30.6% of the benefit flows to the >$190k cohort · original estimate $90M/yr, now $1.4B heading to $3B.
The subsidy ledger · public money in, private assets out
Instrument
Scale
Flows to
EV FBT exemption
$1.4B → $3B/yr
High-income salary-packagers with corporate employment.
Cheaper Home Batteries
$7.2B to 2030
Homeowners able to fund the balance — ~2M batteries.
SRES / solar rebate
~$0.9B/yr
Roof-owners — funded via a levy on every bill, including renters'.
Community Solar Banks
$100M · 25k HH
Renters — but just 0.86% of the 2.9M excluded. Palliative.
⚑ The double jeopardy
The Have-Nots pay twice. First, through tax and tariff, they funded the solar, batteries and EVs that let the Haves leave. Now, as the Haves draw down their grid use, the Have-Nots are left to recover the transmission and distribution assets — swollen by overruns — across a shrinking base. They bankrolled the exit, and they inherit the building everyone else is leaving. That is the reverse wealth transfer, and it is the engine under the entire Grid-vs-Household war.
03
When does leaving the grid pay off?
pick a city · drag the year
For a household that already owns a solar-and-battery system, full defection means buying a little extra storage, a V2H charger and an island-mode switch. As batteries collapse in price and fixed charges climb, the payback on that incremental spend falls off a cliff. Magnitudes are modelled on the sourced 2026–2035 cost and tariff trajectories; directions are faithful.
City · existing CER household
Decision year{{ year }}
⟵ tipping window 2032–34 ⟶
Annual fixed charge avoided
${{ supply }}/yr
Incremental cost to defect
${{ costK }}
Home battery price
${{ bat }}/kWh
Payback incl. energy savings
{{ pbE }} yr
Payback on supply charge alone
{{ pbS }}
years
{{ verdictText }}
{{ verdictBody }}
{{ cityName }} · payback collapse (supply-only)
{{ pb26 }}y
2026
{{ pb30 }}y
2030
{{ pb35 }}y
2035
Probabilistic view · {{ cityName }} {{ year }} · 4,000 Monte Carlo runs
battery cost & fixed-charge path drawn from ranges
A single payback number hides the uncertainty. Letting the hardware price and the fixed-charge trajectory vary across their plausible ranges turns the answer into a distribution — so you can read the whole tail, not just the midpoint.
median
5 yr
0510152040+ yr →
P10 · best case{{ mcP10 }}y
P50 · median{{ mcP50 }}y
P90 · worst case{{ mcP90 }}y
P(payback < 5 yr){{ mcPctU5 }}%
Model — incremental defection cost & corrected supply charges interpolated from the NEM Grid Defection (2026–2035) and Network RAB analyses; energy-usage savings held at ~$1,300/yr. Monte Carlo draws battery/hardware cost (±20% lognormal) and the fixed-charge path (right-skewed for overrun risk). Illustrative, not advice.
04
The fixed-charge time bomb
why $638 was the conservative number
The widely-quoted figure — supply charges "more than doubling to ~$638–778/yr by 2035" — counted only the AEMC's tariff reform. It left out the transmission build. Run the overruns through the regulatory asset base and the real 2035 number for NEM capitals is $912–$1,142/yr — 2.5–2.8× today. The mechanism is a three-stage amplifier.
01
Capex enters the RAB
Every prudent dollar of build is capitalised, then earns a regulated return (~6–7% WACC) plus depreciation. Consumers pay ~9–10% of the asset value, every year, until it is fully written off — 30 to 50 years.
02
Delay compounds it (IDC)
Interest during construction is capitalised too — so years of slippage add to the asset. VNI West alone adds ~$1.14B in IDC; HumeLink ~$710M; Marinus ~$680M. Late is not just late — it is permanently dearer.
03
Opex rides the multiple
Maintenance is benchmarked at 1.5–2% of the RAB — not the original estimate. So when a project's cost doubles, its opex entitlement roughly doubles too. A 100% overrun costs consumers more than 100%.
The fuel · transmission & storage overruns now entering the RAB
Project
Original
Current
Δ
VNI West
$3.96B
$7.6–11.4B
+188%
HumeLink
$1.35B
$3.96B
+193%
Marinus S1+S2
$1.85B
~$6.0B
+224%
AusNet ISP works
~$2B
$7.9B
+295%
Snowy 2.0
$2B
$12B+
+500%
AEMO's own 2025 options report concedes transmission estimates are up to ~100% higher than the 2024 ISP. The Policy Institute puts the full $65–85B program at up to +$600/yr on east-coast bills — before these latest escalations.
Corrected annual fixed charge · 2026 → 2035
Melbourne$402 → $1,142 · 2.8×
Sydney$383 → $1,033 · 2.7×
Adelaide$383 → $943 · 2.5×
Brisbane$347 → $912 · 2.6×
Grey = 2026 · red = 2035, NEM capitals carrying the ISP transmission build. Note: WA's SWIS is deliberately excluded throughout — it is not part of the NEM and carries no ISP transmission cost.
⚑ THE 2030 DETONATION
Most ISP projects enter the RAB at roughly the same moment — around 2030 — exactly as AEMC tariff reform begins and coal-exit price risk peaks (the AEMC's own base case already flags a 13–20% network price rise, 2030–35). The fuse on the fixed charge and the trigger on defection economics light in the same year.
NEM-average annual fixed charge · probability cone to 2035
3,000 runs · overrun severity uncertain
The widely-quoted "$638 by 2035" is only the AEMC tariff-reform path — the dashed line. Layer the transmission RAB on top, with its overrun risk drawn from the build history, and the charge fans into a cone with a fat upper tail. The official number sits near the floor of what is actually likely.
AEMC-only (the headline)
$638
P50 · with transmission
{{ coneP50 }}
P90 · overruns compound
{{ coneP90 }}
P10 · best case
{{ coneP10 }}
Dashed = AEMC tariff-reform-only · gold = median incl. transmission RAB · shaded = P10–P90. Transmission adder ramps post-2029 with a lognormal overrun multiplier (σ≈0.30) calibrated to the +188–500% build history. NEM only; SWIS excluded. Illustrative.
05
The death spiral has two engines
cost falling · charges rising
A load-defection spiral needs two things to turn at once: the cost of leaving must fall, and the cost of staying must rise. For the first time both are happening together — and each rotation pushes the next tier of households toward the exit.
The load-defection spiral
Fixed charges rise to recover the transmission RAB.
Capital-equipped households cut the cord.
The fixed cost spreads over a smaller base.
Per-customer charges rise again — for those left.
The defection threshold falls for the next tier.
Named by Energy Networks in 2015; confirmed by RMI's load-defection model; acknowledged in the AEMC's June 2026 review.
Engine one · the cost of leaving collapses
Installed home-battery price ($/kWh)
2024
$1,100
2026
$820
2030
$500
2035
$280
−75% in eleven years · plus EV V2H adds ~40 kWh of backup at zero extra hardware.
Engine two · the replacement wave upgrades the arsenal
1.51M
pre-2016 solar systems at end-of-life — upgrading from ~3 kW to ~10 kW.
+5.3 GW
net capacity from replacements alone — before a single new install.
~2M
CHBP-subsidised batteries by 2030 — the primary at-risk cohort.
Each replacement converts a household from marginal self-sufficiency to near-total autonomy. By 2030 about two million households will already own the expensive part of an off-grid system — leaving only a ~$3,500 step to the door.
06
Two grids, one country — 2035
the alt-AEMO verdict
When both engines have turned for a decade, the NEM no longer serves one population. It serves two — divided not by income alone, but by whether a household had a roof and the capital to fortify it.
The sovereign · ~65% of households
Prosumers
$400–900/yr
Solar, battery, EV, near-total autonomy. They complain about a few hundred dollars of rising charges — then leave. Their exit is the act that loads the cost onto everyone behind them.
The conscript · ~35% of households
Grid-dependent
$3,200–4,500/yr
Renters, apartments, low-income, ~4% with solar. They cannot defect and cannot escape the RAB. They hold the line on a grid built for a country that is leaving them on it.
4–11×
the cost gap between the two grids by 2035.
500k+
households in energy debt at the 2030 fracture.
3–5
NEM zones entering a confirmed utility death spiral.
The one line to take away
This was never solar households versus the grid. It is the Haves versus the Have-Nots — and the Have-Nots paid for both sides. They funded the rebates that built the Haves' independence, and they inherit the overrun-swollen asset base the Haves are walking away from. The grid built the exit, the public purse paid for the door, and the people who couldn't afford to leave were handed the bill. Sovereignty, in the end, is just having the capital to leave before it arrives.
Source — AEMO 2026 Integrated System Plan & media release (25 Jun 2026); AER Transparency Review (7 Jan 2026); AEMC Pricing Review Final Report (18 Jun 2026); submissions from EUAA, APA, Transgrid, Nexa Advisory, CPA Agency, Policy Institute Australia, VFF, Solar Citizens. Probability tags are the source analysis's directional confidence estimates, not AEMO outputs. Base data reconciled with the ISP 2026 System Dynamics report.