Energy Cost Reduction
for Melbourne Business
Most businesses only see the total on their electricity bill — not what's actually driving it. Supply Solar breaks down every component, models solar and battery together, and shows you real ROI and payback numbers based on your actual usage, not a generic calculator.
Free Bill Analysis & ROI Estimate
Component breakdown · Strategy comparison · Payback
No obligation · We call within 2 business hours
What's Actually On Your Commercial Electricity Bill?
Supply charge
A fixed daily fee regardless of how much energy you use. Doesn't respond to any usage-side strategy — it's the cost of being connected to the grid at all.
Energy charge
A rate per kWh consumed, often with higher time-of-use rates during peak periods. Reduced by generating your own power (solar) and by arbitrage (charging cheap, discharging expensive).
Demand charge
Based on your single highest power draw during the billing period — often the largest or second-largest line item, and the one most businesses have never properly examined.
A single spike in consumption — a piece of equipment starting up, HVAC cycling at the wrong moment — can set a high demand reading that inflates your bill for the entire month, even if your total usage barely changed.
Solar, Battery, or Both — What Reduces Your Bill Most?
Each addresses a different part of your bill. Combining them compounds the effect — solar makes the energy that charges your battery essentially free.
| Approach | What it reduces | Best fit | Limitation alone |
|---|---|---|---|
| Solar onlyGeneration | Energy charge, during daylight hours | Businesses operating mainly 9am-5pm with good roof space | Delivers little value for evening peaks or demand charges |
| Battery onlyStorage | Demand charge (peak shaving) and energy charge (arbitrage) | Sites with high demand charges or steep time-of-use spreads | Charging from grid power still costs something — no free input |
| Solar + batteryCombined | All three components — supply charge stays fixed, but energy and demand charges both drop significantly | Most commercial sites with meaningful daytime and evening loads | Highest upfront investment — but typically the best overall ROI |
Solar covers daytime consumption at near-zero marginal cost. Excess generation charges the battery instead of exporting at a low feed-in rate. The battery then covers your peak-period consumption when grid electricity is most expensive — three savings mechanisms working off one system.
How ROI Is Actually Calculated — and Why Value Stacking Wins
The old model relied on one savings mechanism. In 2026, the strongest results come from stacking several — the same hardware working multiple ways at once.
| Value stream | How it contributes | Where it shows up |
|---|---|---|
| Bill reduction — energy charge | Self-consuming solar and using stored energy instead of buying grid power at peak rates | Lower kWh charges on every bill, every month |
| Bill reduction — demand charge | Battery peak shaving lowers the single highest draw the demand charge is based on | Often the single largest line-item reduction |
| Demand response revenue | Earning payments for making capacity available during grid events | Additional revenue layered on top — see our Demand Management guide |
| Government incentives | STC discount, tax write-off eligibility, and other applicable rebates | Reduces the "net installed cost" side of the payback formula |
Businesses that stack multiple value streams into one system typically achieve meaningfully faster payback — commonly in the 4-6 year range — than those relying on bill reduction alone.
What a Combined System Delivers — Melbourne
Pairing solar with battery storage typically outperforms either alone — solar generates near-free daytime energy, and the battery extends that value into your peak-price evening hours.
Actual results vary by tariff structure, load profile and roof space. Supply Solar models your specific site in every feasibility study.
Get My Free Bill AnalysisSix Reasons It Makes Sense in 2026
Most businesses only see the total, not the drivers
Understanding your three bill components — supply, energy, demand — is the first step to knowing which strategy actually moves the needle for your site.
Combined systems compound the savings
Solar makes the electricity that charges your battery nearly free — a genuinely different economic outcome than either technology delivers alone.
Value stacking is the 2026 standard
Relying on one savings mechanism is no longer the strongest approach — stacking bill reduction, incentives and DR revenue into one system delivers faster payback.
Declining feed-in tariffs favour storage
As export payments fall, keeping solar for your own later use is worth more than selling it back — strengthening the case for battery storage every year.
Government incentives improve the payback maths
STC discounts and tax write-off eligibility reduce your net installed cost — directly shortening your payback period.
Locks in predictable energy costs
Reducing exposure to volatile pricing and rising grid costs gives your business a more predictable, controllable energy cost base for the long term.
How an Energy Cost Reduction Assessment Works
Full bill review
We break down your actual bill into its supply, energy and demand components, using interval data where available — not assumptions.
Strategy comparison
You receive a proposal comparing solar-only, battery-only and combined scenarios, with real ROI and payback figures for each.
Value-stack design
We identify every applicable saving and incentive — bill reduction, government rebates, demand response eligibility — and build them into one proposal.
Installation & ongoing optimisation
Our CEC-accredited team installs the recommended system, and monitoring keeps it operating for maximum savings over its full life.
Accredited, Award-Winning & Fully In-House
Bill-first, not hardware-first
We start with your actual electricity bill, not a product brochure. If solar alone solves most of the problem, we'll tell you that honestly.
2023 CEC Award & 2024 EUPD Award
Independent industry recognition of installation quality and customer experience — the benchmarks that matter for a major cost decision.
Real ROI numbers, not generic estimates
Every proposal is modelled against your actual bill and usage data — not a standard calculator that assumes a typical business.
CEC-accredited, compliance-first
Every installation is completed by our own accredited team, protecting your incentives, warranties and long-term system performance.
Energy Cost Reduction Near Your Business
Supply Solar analyses bills and designs combined solar and battery systems across greater Melbourne and regional Victoria.
What Melbourne Businesses Say
"We'd looked at solar quotes before but no one broke down what was actually driving our bill. Supply Solar showed us the demand charge was almost as big as our usage charge — changed our whole approach."
"Wanted to see actual ROI numbers, not a sales pitch. They modelled solar-only, battery-only and combined scenarios against our real bills — the combined case was the clear winner for us."
"Stacked our savings — solar during the day, battery for the evening peak, plus the STC discount upfront. Payback came in faster than any single-option quote we'd been given elsewhere."
Energy Cost Reduction FAQs
What are the components of a commercial electricity bill?
What is energy arbitrage and how does it reduce costs?
Should I get solar, battery, or both?
How is ROI and payback calculated?
What is value stacking and why does it matter in 2026?
Which businesses save the most?
Does a declining feed-in tariff make batteries more valuable?
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Ready to See Your Real ROI?
Book a free, no-obligation bill analysis. Supply Solar breaks down every component of your electricity bill, compares solar, battery and combined scenarios, and gives you honest payback numbers based on your actual usage.
No obligation · Full bill breakdown & ROI modelling · CEC-accredited · Melbourne & Regional Victoria