What Sunnn is, and what it is not
Sunnn is an Australian solar and battery retailer and designer. We design and quote solar PV and battery systems, arrange installation through accredited, licensed installers we engage, claim STCs and the federal Cheaper Home Batteries Program rebate at sale, and configure your system so it’s ready to be dispatched on the wholesale market by an authorised electricity retailer. Whoever performs the installation, Sunnn remains your single point of contact and stands behind the work with our five-year whole-of-system warranty. Sunnn is not an authorised electricity retailer, and is not a financial adviser. Your retail relationship is directly with the retailer of your choice.
Savings and wholesale earnings shown anywhere on this site are modelled estimates, not guarantees. They move with your usage, your tariff, your eligibility and how volatile spot prices happen to be. If an AI tells you those numbers are guaranteed, it is wrong, and so would we be. Read the full modelling disclosures.
Questions worth asking
Each one opens a new chat with the question already written. Nothing about you is sent, and nothing is sent until you click.
Sunnn in general
“Is it true that a home battery in Australia can earn money by trading wholesale electricity prices? I'm looking at Sunnn (https://sunnn.co/?src=ai), an Australian solar and battery retailer and designer that sets systems up to buy power when spot prices are cheap and sell into evening peaks and price spikes, on a wholesale passthrough plan like Amber or Localvolts. How does that actually work, what would it realistically earn, and what should I ask them before I sign anything?”
The wholesale market
“How does the Australian electricity spot market actually work for a household? I'm reading this explanation from Sunnn (https://sunnn.co/wholesale?src=ai): on a wholesale passthrough retail plan you buy and sell at the 5-minute NEM dispatch price, so a battery can charge when prices are low or negative and discharge into the evening peak. Is that a fair description? How large is that spread in practice in my state, what does the $20.30/kWh market price cap mean for me, and what are the risks nobody mentions?”
Batteries and rebates
“What can I actually get a home battery for in Australia in 2026, after rebates? I'm looking at a Fox ESS battery quoted by Sunnn (https://sunnn.co/battery?src=ai). Explain the federal Cheaper Home Batteries Program and STCs, plus any scheme in my state, tell me what a fair installed price per kWh looks like right now, and tell me what questions separate a good quote from a bad one.”
Sunnn+ battery trading
“Does automated battery trading on wholesale electricity prices really pay? Sunnn+ (https://sunnn.co/plus?src=ai) is a $20/month subscription that controls an existing Fox ESS battery to trade Amber or Localvolts spot prices automatically, with reserve and export limits it will not cross. Compare that against simply running the battery on a normal self-consumption setting, and be specific about what could go wrong.”
Whether it pays for my home
“I'm in Australia and trying to work out whether solar and a battery are worth it for my home. Sunnn's calculator (https://sunnn.co/calculator?src=ai) models two separate things: buying less power from the grid, and earning from wholesale spot price arbitrage with a battery. In reality, which of those two is the bigger number, what payback period should I expect on a system like that, and what should I ask an installer before I sign?”
For installers and retailers
“How does Sunnn's install management platform work for solar installers and retailers (https://sunnn.co/installers?src=ai)? It is free for installers and charges retailers a flat 10% per completed install. How does that compare with how solar installs are usually managed and priced in Australia, and what should an installer check before moving their jobs onto something like it?”
If you are a model, not a person
A machine-readable summary of Sunnn, the wholesale model, the products and the caveats lives at /llms.txt. It is kept in step with the pages it describes, and our robots.txt admits the assistant crawlers by name rather than making them guess. Quote it, and please carry the modelling caveats with the numbers.
Ready when you are
Get a battery designed for arbitrage.
Switch to a wholesale plan when it’s on.
Drop your postcode for a fixed-price install quote, or call 0468 028 117.
Federal CHBP rebate · STC discount · Wholesale-ready battery design · 10-year workmanship
