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Solar + Battery sizing | Built for the NEM | No commercial bias

The right system size. Numbers that don't lie.

Every number built on your customer's actual bill and tariff. Not a flat rate. Not a rule of thumb. Not a blended ROI you can't defend.
The investment either stacks up — or it doesn't.

Register for early access
Early access only · For solar and battery installers in the NEM
What's inside

Features built for the analysis. Not the proposal.
Accurate sizing your customers can trust.

The customer's actual bill is the starting point. Not a generic assumption.

AI bill parsing
Upload the customer's electricity bill. ENRG ENGINE extracts tariff rate, usage, feed-in tariff, peak/off-peak windows, supply charge, and retailer automatically — and feeds it directly into the sizing engine. No manual re-entry.
Smart meter interval data
Upload CSV interval data direct from their retailer. Battery sizing optimised against their actual half-hourly consumption — not a generic load profile.
Retailer tariff library
AGL, Origin, Energy Australia, Simply Energy, Amber and others recognised automatically — no manual tariff entry.
Time-of-use tariff modelling
Peak, off-peak, and shoulder rates applied correctly — not a blended flat rate.

Solar and battery sized together, optimised to this customer's specific situation.

Site-specific solar generation
PVGIS and Solcast irradiance data specific to the customer's location — not generic state averages.
Roof data auto-detected
Orientation and shading pulled automatically from the customer's address via Google Solar API.
MILP battery sizing
Finds the battery size that minimises the customer's bill under their actual tariff — not days of autonomy, not rules of thumb.
Dispatch modelling
Shows exactly when the battery charges and discharges across a typical day based on the customer's real usage pattern.
Right-sized, not oversized
The model finds the optimal size. That may be smaller than the maximum — and we'll tell you that.

Every financial metric your customer needs to make a confident decision.

Solar + battery split payback
Solar and battery payback shown separately — the customer can evaluate whether the battery is worth the additional cost on its own merits.
IRR & NPV
Investment return as a percentage (IRR) and total value in today's dollars (NPV) — the two metrics financially literate customers ask for.
25-year cash flow
Year-by-year projection of bill savings and cumulative return across the full system lifetime.
Bill before and after
Annual electricity cost shown with and without the system — the clearest way for a customer to see the impact.
Effective battery energy rate
The cost of battery-stored energy expressed as $/kWh — directly comparable to what you're paying the grid. Makes the investment case immediately legible to any customer.

Built for the NEM from the ground up — not a global tool with AU features added.

DNSP export limit by postcode
SA Power Networks export constraints applied automatically based on the customer's postcode — not a generic 5kW default.
NEM-aware tariff handling
Network charges, supply charges, standing charges, and feed-in rates broken out correctly by DNSP region — not collapsed into a flat rate assumption.
REPS / VPP eligibility
SA customers automatically flagged for Virtual Power Plant eligibility and the additional $150–300/year earnings opportunity.

Professional, white-label, and defensible. Ready to hand over.

White-label PDF
Your brand on every page — logo, colours, business name. ENRG ENGINE is invisible to your customer.
Client-ready formatting
Designed to be handed directly to your customer as part of the proposal — no reformatting required.
Every assumption shown
Tariff source, export limit, escalation rate, panel degradation, deeming period — all documented in one place. Every number traceable. Every recommendation defensible.
Installer + customer fields
Each report personalised with the customer's name and the installer's details.
What's inside

Features built for the analysis.
Not the proposal.

Analyse the Bill ›
  • AI bill parsing
  • Smart meter interval data
  • Retailer tariff library
  • Time-of-use tariff modelling
Size the System ›
  • MILP battery sizing
  • Site-specific solar generation
  • DNSP export limits
  • REPS eligibility
  • VPP flag
Model the Finances ›
  • NPV / IRR
  • Split solar + battery payback
  • Effective battery energy rate
  • 25-year cashflow
Australian NEM ›
  • NEM-specific tariff handling
  • DNSP by postcode
  • Export limit modelling
The Report ›
  • Client-ready PDF
  • Transparent assumptions
  • White-label branding
The problem

Your customer wants the right numbers.
Not the convincing story.

Most proposals come back built on generic assumptions — a flat tariff rate, a battery sized by a rule of thumb, a blended ROI you can't defend.

That customer is making a $15,000–$30,000 decision. They can't see what the recommendation rests on. They're trusting you.

Tools available today produce the proposal — the analysis serves the sale. ENRG ENGINE is built the other way around: the analysis is the product. The numbers either hold up or they don't — and your customer can see exactly why.
Generic tariff assumptions
Most tools use a flat rate — not your customer's actual retailer tariff with time-of-use blocks, demand charges, and network fees.
Battery size by rules of thumb
Days of autonomy and self-consumption targets don't find the battery size that actually minimises the customer's bill.
Blended solar + battery payback
One payback figure hides whether the battery is economically justified on its own. Customers can't evaluate what they're actually buying.
Assumptions you can't defend
When a customer asks "why did you recommend that size?" — can you show them the working?
Outcome
Right-sized system.
Real customer value.
Analysis Execution

ENRG ENGINE

Analysis · No bias
  • NEM-specific sizing
  • MILP optimisation
  • DNSP · REPS · VPP
  • Transparent inputs
  • Split solar + battery ROI
  • System cost only
  • No layout or design
Analysis
feeds
design

Design Tools

Design · Some analysis
  • Roof design and layout
  • Full system pricing
  • Compliance docs
  • CRM and lead management
  • Proposal delivery
  • Some financial analysis
  • Serves the proposal
Design
enables
build

Installation

Physical execution
  • Panels mounted
  • Battery installed
  • Grid connection
  • CEC accredited
  • System commissioned
  • On site
  • No analysis
ENRG ENGINE
Analysis · No bias
  • NEM-specific sizing
  • MILP optimisation
  • DNSP · REPS · VPP
  • Transparent inputs
  • Split solar + battery ROI
  • System cost only
  • No layout or design
↓
Design Tools
Design · Some analysis
  • Roof design and layout
  • Full system pricing
  • Compliance docs
  • CRM and lead management
  • Proposal delivery
  • Some financial analysis
  • Serves the proposal
↓
Installation
Physical execution
  • Panels mounted
  • Battery installed
  • Grid connection
  • CEC accredited
  • System commissioned
  • On site
  • No analysis
↓
Outcome
Right-sized system.
Real customer value.

Where ENRG ENGINE sits relative to everything else.

Where ENRG ENGINE sits relative to everything else.

How it works

From customer inquiry
to numbers that hold up.

ENRG ENGINE handles the analysis. You handle the relationship.

01 Upload the customer's bill ›
Upload the bill or CSV interval data. ENRG ENGINE reads the tariff, usage, and retailer automatically.
02 Enter site details ›
Address and roof orientation. NEM-specific factors — export limits, tariffs, REPS — applied automatically by postcode.
03 The engine runs the analysis ›
Solar sized to the roof. Battery sized to the tariff. Payback, IRR, and 25-year return calculated automatically.
04 Compile the report ›
Review the numbers, adjust if needed, and download the white-label PDF — branded to your business, ready to hand over.
The difference

Other tools try to convince your customer.
This one informs them.

The tools you already use execute the design. ENRG ENGINE determines whether the numbers hold up.

The current alternatives
Marketed to help installers convince customers
Battery sized by rules of thumb — not what minimises the bill
Partner integrations baked into the proposal
Global tools with AU features added — not NEM-native
ENRG ENGINE
Accuracy over persuasion — the numbers speak, not the installer
Battery sized to the customer's actual tariff — smaller when smaller is right
No equipment partnerships. No commercial bias.
Built for the Australian NEM — DNSP, tariffs, REPS handled automatically
The current alternatives
✕ Built to convince, not inform
✕ Battery sized by rules of thumb
✕ Partner integrations in the proposal
✕ Global tools, not NEM-native
ENRG ENGINE
✓ Accuracy over persuasion
✓ Sized to the actual tariff
✓ No commercial bias
✓ Built for the Australian NEM

The ROI either works or it doesn't.
Your customer deserves a clear answer.

Early access

For the installer who
values getting it right.

Early access only · For solar and battery installers in the NEM