At a Glance: Delta AC MAX Score 2.6 out of 5
The Delta AC MAX is a mid-range three-phase AC charger that loses marks due to lack of in-built solar integration. Additional hardware and software can be used for energy management and it does scores well on company presence and local support, making it more attractive for commercial or multiple installs.
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- Price: $$$$ The Delta AC MAX Basic is priced around $1,250, while the Smart version ranges from $1,800 to $2,000. This places it in the upper-mid to high price tier.
- Company Backing in Australia: 5/5 Delta Electronics has a long trading history of over 50 years and operates in multiple electronics sectors beyond EV charging. It has local offices in Sydney and Melbourne, plus dedicated Australian support staff and a local product portal. With diversified product lines and deep global experience, Delta earns a full score.
- Warranty Offer: ⅖ Delta offers a 2-year warranty on its AC MAX chargers in Australia. While this is on par with the minimum industry standard, some competitors now offer up to 5 years. Two points are awarded based on the 1 point per year scoring system.
- Solar Compatibility: 0/5 Delta AC MAX chargers do not offer built-in solar optimisation. They can only integrate via ModBus RTU (Basic) or TCP (Smart), requiring additional software and hardware to manage energy loads. There’s no native CT clamp integration or ability to activate charging on low surplus solar. No points are awarded here.
- Functionality: 3/5 The Delta AC MAX ticks several boxes with OCPP 1.6 support (Smart only), dynamic load management via third-party integration, and an optional longer cable with the untethered version. However, it lacks an LCD display (only status LEDs) and solar-smart charging modes. Weather protection is rated IP55. It scores 3 out of 5 points.
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Company Overview
Delta Electronics is a well-established company founded in 1971 and headquartered in Taiwan. It has research and development facilities in China, Europe, Japan, Singapore, Thailand, and the U.S, and a wide range of power and electronic components across various sectors. In the Power Electronics domain, their offerings include components such as inductors, RF inductors, transformers, networking modules, EMI filters, solenoids, power modules, and current sensing resistors. Delta also produces high current SMT power inductors and power inductors and supports systems for both power distribution and control under the “Power and System” category, along with specialised solutions from its Innergie brand.
In the Mobility sector, Delta focuses on EV powertrain systems and both AC and DC chargers, catering to the growing electric vehicle market. Under the Automation banner, their product range spans industrial automation and building automation, enabling smarter manufacturing and infrastructure management. Within the Infrastructure category, Delta delivers solutions for ICT infrastructure, energy infrastructure and industrial solutions, and display and visualisation systems.
Delta Electronics has marked several key milestones in sustainability, innovation, and global expansion. In 2024, it earned the ENERGY STAR® Sustained Excellence Award for the seventh year running and was again named Partner of the Year. It was also listed among Clarivate’s Top 100 Global Innovators and earned double A-List ratings from CDP for climate and water initiatives.
In 2023, its Fremont HQ became the city’s first LEED Zero Energy certified building, and Delta was included in the Dow Jones Sustainability World Index for the 13th straight year. The acquisition of TB&C also expanded its EV capabilities.
Earlier achievements include joining the RE100 initiative in 2021, aiming for 100% renewable energy by 2030, and receiving the world’s first LEED Platinum certification for a data centre in 2019. These milestones highlight Delta’s commitment to energy-efficient technologies and sustainable business growth. Its sales revenue in 2024 was US$13.131 billion.
Delta’s Australian subsidiary operates out of offices in Sydney and Melbourne, and on its Australian website the company has a clear link to its local support team, as well as a solid knowledge base and the ability to place collection and replacement requests through its online portal.
Popular Models and Comparison of Features
Delta Electronics makes two AC chargers: the AC MAX, which is available in either 11kW or 22kW, and which also comes in a Smart format, and the AC Mini Plus.
| Product Name | AC MAX Basic 22KW | AC MAX Smart 22kW |
| Image |  | |
| Product SKU | EIAWE22KTBS0A02 | EIAWE22KTSE5A04 (untethered) and EIAWE22KTSE5A04 (tethered) |
| Price (Approx. AUD price RRP inc. GST) | $1250 | $1800 |
| Country of manufacture | Thailand | Thailand |
| EV compatibility | Type 2 | Type 2 |
| Cable length | 5m | 5m |
| Internet connection | Bluetooth, RS485 | Ethernet (RJ45), WLAN, Bluetooth, 2G / 3G / 4G (internal cellular modem) |
| Kilowatts | 22kW | 22kW |
| Size | 218 × 371 × 167 mm | 218 × 371 × 167 mm |
| Display | Status LED, 4 colors | Status LED, 4 colors |
| Weight | 6kg including cable | 6kg including cable |
| Warranty | 2 years | 2 years |
| Weather Resistance | IP55/IK09 | IP55/IK09 |
| Solar self-consumption optimisation? | No. ModBus RTU for energy management | No. ModBus TCP for energy management |
| OCPP | No | Backend Connection via OCPP 1.6 |
| App control | Yes | Yes |
| Other features | Key switch user auth | RFID and ISO 15118 for user auth, OTA firmware updates |
| Datasheet | Datasheet | Datasheet |
What We Like About Delta EV Chargers
Aside from the sleek stylish design on the AC Max range, it’s hard to go past EV chargers made by a company with 50+ years in the electronics business and the R&D nous to match.
Knowing that a local support team is on hand to come to the party should a warranty claim be required is also peace of mind. Delta’s app is a nice touch also, making controlling and checking on charging status a breeze. Built-in DC fault current detection is also welcome, for added protection against potential power leaks.
However, the combination of a mid-high price and lack of features like in-built solar load-balancing and the higher IP65 rating of other brands is a missed opportunity.
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Key Features
Smartphone app
Delta’s AC MAX range comes with the convenience of a dedicated AC MAX smartphone app, which connects to the charger via a simple QR code scan. Once linked, the app gives users full access to a suite of smart features, including live charging status, real-time power consumption, and charging history tracking. Scheduled charging can be easily set through the app — a handy tool for those looking to take advantage of off-peak tariffs or to better align with solar production. Users can also adjust the LED display brightness, making it less obtrusive in dimly lit driveways or garages.
4G Sim
For those who want a charger that’s fully network-ready straight out of the box, the Delta AC MAX Smart is the standout. It features a built-in 4G Micro-SIM slot, eliminating the need to connect the charger to a home Wi-Fi network or external gateway. This is particularly useful for remote sites, strata environments, or where network reliability is patchy. The SIM-based connection allows seamless remote monitoring and firmware updates, without relying on a local network setup — simplifying installation and reducing troubleshooting down the line.
RFID Authentication
The AC MAX Smart offers RFID card authentication, allowing only authorised users to start charging. This is a step up from the Basic model, which uses a manual key switch.
RFID access is ideal for shared or commercial environments like:
- Apartment blocks
- Workplace fleets
- Public chargers
It also enables simple usage tracking if cards are assigned to individual users or vehicles.
For private homes—especially when the charger is inside a locked garage—RFID is often unnecessary. This feature suggests the Smart model is better suited to commercial or multi-user applications.
How Much Does Delta AC MAX Cost?
- The AC MAX Basic starts at around $1250 online while the AC MAX Smart costs between $1800-2000.
- This product must be installed by a licensed electrician at an extra cost.
- Additional energy management functionality is available at an extra cost using DeltaGrid EV Management, ideal for public and community spaces.
Pros and Cons
| Pros | Cons |
| Smartphone app connectivity includes scheduled charging, charging history and status | No in-built load balancing or solar integration, requires external energy management software via Modbus TCP (Smart) or Modbus RTU (Basic) |
| Local subsidiary support | Upper end of market price range for Smart version |
| 4G Sim, as well as ethernet, WLAN and Bluetooth networking | No EV charger designed for single phase residential homes currently available in Australia |
Installation
- All level 2 chargers require to be wired into your house’s electrical system and need to be performed by a licensed electrician.
- For 22kW charging, a three-phase connection is required.
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Warranty and Service
- With Delta’s established and worldwide reputation we would expect the AC MAX is a durable and reliable product.
- All Delta chargers are backed by a 2-year warranty which is lower than some other manufacturers. But, with a strong local presence in Australia, customers should be able to count on timely and reliable support when it’s needed.
Should I Buy The Delta AC MAX?
The Delta AC MAX is a tidy, slimline unit that would look good in any garage. However, its higher price, three-phase connection and lack of built-in load balancing means it may not tick all the boxes for residential buyers.
With no 7kW single-phase optionon the Australian market to line up with single-phase home charging setups, Delta is missing a clear opportunity.
However, the ability to integrate with Delta’s DeltaGrid EV Management software
makes the AC MAX range appealing for commercial, public and community spaces – particularly those with multiple installations.
Either way, Delta’s strong local presence and 50 years’ experience in the electronics business is worth a lot.
For those looking to dive deeper into EV chargers, Solar Choice makes it easy to compare free quotes. You can also head over to our YouTube channel to check out more EV charger reviews or browse Solar Choice’s comprehensive guides to gain deeper insights and make the best decision for your charging needs.
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FAQs
Are Delta EV chargers compatible with all EV models?
Yes, all of the Delta AC MAX EV chargers are universally compatible with all EV models that use a Type 2 plug.
Does my Delta AC MAX EV charger require professional installation?
Yes, all hardwired Delta AC MAX EV chargers require installation by a licensed electrician.
Can I control my Delta AC MAX EV charger remotely?
Yes, it is compatible with the Delta AC MAX smartphone app.
Can my Delta AC MAX EV charger be installed outdoors?
Yes, the charger has a durable, weatherproof design rated to IP55 and is suitable for most indoor and outdoor installations, although it is advisable to install outdoor units under cover.
Do Delta chargers come with a warranty?
Yes, the Delta AC MAX EV chargers come with a comprehensive 2-year warranty.
