For a Perth household with a Fronius inverter, the Fronius Wattpilot is the natural way to charge an electric vehicle. It is a smart charger built by the same manufacturer as the inverter. The solar system and the car speak the same language. They can be managed in the same app. This review explains what the Wattpilot is. It covers the difference between the Flex and Go versions. It shows how it charges from surplus solar. It outlines the households it suits best.
The short verdict is that the Wattpilot is a well-made, genuinely smart charger. Its strongest advantage is how neatly it fits a Fronius solar system. It turns midday surplus into low-cost kilometres rather than low-value exports.
What the Fronius Wattpilot Is
The Wattpilot is a dedicated wall or portable charger for electric vehicles. It is designed to charge primarily from a home’s own solar generation. It uses the standard Type 2 connector fitted to every electric vehicle sold in Australia. It is controlled through the Fronius app and Fronius Solar.web. These are the same platforms that monitor a Fronius solar system. Its defining feature is the ability to watch live solar production. It feeds the car the surplus the home is not using. This surplus would otherwise go to the grid for a low feed-in rate.
Flex or Go: The Two Versions
The Wattpilot comes in two forms. The Wattpilot Flex is the wall-mounted charging station. It is a fixed unit installed at the parking spot. The Wattpilot Go is a portable charger with a plug. It can be moved between locations. Both are available in 11 and 22 kilowatt models. They share the same Eco and Next Trip smart charging. The table below sets out the difference.
| Version | What it is | Best for |
|---|---|---|
| Wattpilot Flex | A wall-mounted charging station, offered in Flex Home and Flex Pro variants | A permanent, tidy home charging point in a set parking spot |
| Wattpilot Go | A portable charger with a plug that can be moved between locations | A household wanting flexibility, or a charger that travels |
Within each version, the 11 kilowatt model delivers up to 11 kilowatts. The 22 kilowatt model delivers up to 22 kilowatts on a three-phase supply. On single phase it delivers up to 7.4 kilowatts. Both automatically switch between single-phase and three-phase charging. They switch as available solar rises and falls. They modulate their draw from around 1.4 kilowatts upward. They track the surplus. The Flex Pro variant adds a built-in, billing-grade electricity meter. This is useful for a household charging a company car. It needs its kilowatt hours recorded. The Flex Home covers everyday household charging. For most single-phase Perth homes, the practical charging speed is up to 7.4 kilowatts. This comfortably refills a typical day of driving overnight or across a sunny afternoon.
Eco Mode: Charging From Your Solar
Eco mode is the reason to choose a Wattpilot. In this mode the charger charges first from surplus solar. It draws power into the car only as the panels produce more than the home is using. It tops up from lower-cost grid power if needed. On a sunny Perth day, that means the car fills up on energy that would otherwise be exported for a few cents. This is close to the lowest-cost driving a household can achieve. The automatic phase switching keeps charging going smoothly. It does this even as clouds pass. Surplus rises and falls as clouds move.
Next Trip Mode: A Guaranteed Charge When You Need It
Solar charging is ideal. But sometimes a car simply needs to be ready by a certain time regardless of the weather. Next Trip mode handles that. It lets the household set a target amount of charge to be in the car by a chosen departure. The Wattpilot ensures that minimum is met. It uses solar where it can. It uses grid power where it must. Then it returns to prioritising solar for anything beyond the target. It is the practical safety net that makes relying on solar charging comfortable day to day.
Bidirectional-Ready: Built for What Is Coming
The Wattpilot Flex is also engineered for the future. It incorporates an ISO 15118 communication chip. This is the standard that underpins bidirectional charging. It makes the hardware ready for AC bidirectional charging. A car can send stored energy back to power the home. This is known as vehicle-to-home. Or it can send energy to the grid. This is known as vehicle-to-grid. It is worth being clear about what that means today. The hardware supports it. Full vehicle-to-grid capability depends on evolving Australian standards. It depends on network approvals and vehicle compatibility. True vehicle-to-home charging is advancing in Western Australia. For a Perth household, the Flex is a way to be prepared for bidirectional charging when it arrives. It is not a feature to rely on today.
Why It Suits a Fronius Home
Any smart charger can divert solar. The Wattpilot does it as part of the Fronius ecosystem rather than as a bolt-on. The inverter and the charger are from the same manufacturer. They coordinate cleanly. The household monitors solar generation, home consumption and car charging together. They do this in one Fronius app rather than juggling separate systems. For a home already invested in Fronius, that single-ecosystem simplicity is the Wattpilot’s real advantage. It is why it is the charger Positive Energy Solutions most often pairs with a Fronius inverter.
Fronius Wattpilot Specifications at a Glance
- Versions: Wattpilot Flex (wall-mounted, in Flex Home and Flex Pro variants) and Wattpilot Go (portable, with a plug).
- Charging power: up to 11 or 22 kilowatts on three-phase supply, up to 7.4 kilowatts on single phase, with automatic 1- and 3-phase switching.
- Solar charging: dynamic surplus charging that modulates from around 1.4 kilowatts upward to track live solar.
- Charging modes: Eco (solar surplus) and Next Trip (guaranteed charge by a set time).
- Connector: standard Type 2, compatible with every electric vehicle sold in Australia.
- Control: Solar.wattpilot app over WiFi or LAN, with a touch interface and RFID user profiles.
- Installation: the Flex is rated for indoor and outdoor use, with a 6 metre Type 2 cable.
- Bidirectional-ready (Flex): includes an ISO 15118 chip for future AC vehicle-to-home and vehicle-to-grid charging, subject to evolving standards and vehicle support.
Who the Wattpilot Suits
The Wattpilot is the obvious choice for a household with a Fronius inverter. They want their car charging to run inside the same system they already trust. It also suits anyone who values solar-first charging with a simple, guaranteed fallback. The Go version specifically suits households that want the flexibility of a portable unit. A home running a different ecosystem, such as SigEnergy or Tesla, will usually be better matched to that brand’s own charger. That kind of choice is exactly what a proper system design settles.
How Positive Energy Solutions Can Help
Positive Energy Solutions is a Fronius Solutions Partner Plus. The team installs and supports the Wattpilot directly. It matches it correctly to a Fronius solar system. Every charger is installed by our accredited installers on its own circuit. We follow the current wiring rules and Western Power requirements. The solar system feeding it is backed by a 10-year installation workmanship warranty. Positive Energy Protection, powered by Omnidian, monitors it for performance from day one.
Frequently Asked Questions
Does the Fronius Wattpilot only work with a Fronius inverter?
The Wattpilot works best with a Fronius inverter. The two share the same app. They coordinate cleanly for solar surplus charging. It can operate in other homes. Its main advantage is the single-ecosystem integration with a Fronius solar system. It is usually chosen for Fronius homes.
What is the difference between the Wattpilot Flex and Go?
The Wattpilot Flex is a wall-mounted charging station fixed at the parking spot. It is offered in Flex Home and Flex Pro versions. The Pro adds a billing-grade meter for company-car use. The Wattpilot Go is a portable charger with a plug. It can be moved between locations. Both offer the same Eco and Next Trip smart charging in 11 and 22 kilowatt models.
How fast does the Wattpilot charge?
On a single-phase home, the Wattpilot charges at up to 7.4 kilowatts. This suits most Perth households. It refills a typical day of driving overnight. On a three-phase supply, the 11 and 22 kilowatt models reach up to 11 and 22 kilowatts respectively.
Can the Wattpilot charge only from solar?
Yes. In Eco mode the Wattpilot charges first from surplus solar. It adds grid power only if needed. Next Trip mode guarantees a set charge by a chosen time. It uses solar where possible. It uses grid power to make up any shortfall.
Can the Fronius Wattpilot Flex send power back to my home?
The Wattpilot Flex is built with an ISO 15118 chip. It makes it ready for AC bidirectional charging. It is designed to support vehicle-to-home and vehicle-to-grid in future. In practice that capability is advancing in Western Australia. The standards, network approvals and vehicle compatibility are still being finalised. It is best viewed as future headroom rather than something usable today.
Charge Your Fronius Home the Smart Way
For a Perth home built around a Fronius inverter, the Wattpilot is the charger that keeps everything in one system. It turns midday solar into the lowest-cost kilometres on the road. The right model depends on the home’s supply and parking. A Positive Energy Solutions consultation is designed to match that.
Talk to the local team about a Fronius Wattpilot for your Perth home: request your quote from Positive Energy
About the Author
Jason Wiktorowicz
Sales Manager, Positive Energy Solutions | Perth, WA
Jason has been at the centre of Western Australia’s energy transition for over a decade. He was Orchestration Lead on Project Symphony. That was WA’s largest virtual power plant pilot. He was Stream Lead on Project Encore. He worked directly with AEMO, Western Power and Energy Policy WA. He shaped how distributed energy resources connect and operate on the SWIS. That work included developing and rolling out CSIP-AUS. It is now mandatory for all new WA grid connections. He also led Emergency Solar Management. It was the first program of its kind in WA. He led VPP for Schools. It provided direct market benefits through Supplementary Reserve Capacity. He led REBAR, the WA Residential Battery Rebate scheme.
At Positive Energy Solutions, Jason leads sales with a focus on system design accuracy and long-term performance. Positive Energy Solutions installs solar and battery systems, EV chargers and heat pumps. It holds partner accreditations with Fronius, SigEnergy, iStore and SunPower.
10-year installation workmanship warranty. Positive Energy Protection, powered by Omnidian, performance monitoring included on all systems.
