Description
The Mastiff MK II is Maxxiom’s flagship off-grid solar system for home – built for full-size households, remote communities and sites that simply cannot run short of power. A 10 kVA inverter, 25 kWh of lithium storage expandable to 50 kWh, and up to 13.2 kW of solar across four MPPT controllers. Smart load control protects the essentials when storage runs low, and generator auto-start is built in, so power is always there.
10 kVAInverter output
25 kWhLithium battery (exp. to 50 kWh)
13.2 kWMaximum solar (quad MPPT)
45 hrsRuntime at 0.5 kVA
Key Features of This Whole-Home Off-Grid Power System
- Quad MPPT solar charging across east, north and west arrays – 30 panels recommended
- 32 A primary and auxiliary outputs for full-home distribution
- Smart control of non-critical loads to extend battery runtime automatically
- Generator auto-start and charging built in (15-32 A interface)
- 25 kWh storage (22.5 kWh usable), expandable by a further 25 kWh
- 4G cellular monitoring included; Wi-Fi and Peer-to-Peer Wireless Display options
- Water and fuel level sensors included
- Stainless steel cabinets, IP55 rated with active cooling
Why the Mastiff Suits Full-Size Off-Grid Homes
Runs the whole house10 kVA and 32 A outputs mean air-conditioning, electric cooking, laundry and a workshop can coexist – not take turns.
Nearly self-sustainingUp to 13.2 kW of solar across four MPPTs captures morning, midday and afternoon sun. Typical usage is almost entirely covered by generation.
Protects the essentialsWhen storage runs low the system sheds non-critical circuits automatically, keeping the fridge, water and lights alive.
Doubles when you need it25 kWh now, 50 kWh later with the expansion cabinet – about 45 hours at a steady 0.5 kVA even before expansion.
Backup that looks after itselfGenerator auto-start and charging is built in – it runs only when genuinely needed, then shuts down.
Australian madeDesigned and built in Brisbane in stainless steel, IP55 rated with active cooling for the outback and the coast alike.
Technical Specifications
| Output | |
|---|---|
| Nominal output | 10,000 VA (5,700 VA at 40°C), 230 VAC |
| Peak power | 15,000 W (10 seconds) |
| Primary power AC | 32 A, 230 VAC |
| Auxiliary power AC | 32 A, 230 VAC |
| Inlet | 32 A, 230 VAC (generator) |
| Battery | |
| Battery capacity | 25 kWh (5 x 5 kWh modules), expandable +25 kWh |
| Usable capacity | 22.5 kWh |
| Runtime at 1.5 kVA | 15 hours |
| Runtime at 0.5 kVA | 45 hours |
| Solar | |
| Recommended panels | 30 x 440-510 W (450 VOC per string) |
| Maximum solar input | 13.2 kW, quad MPPT |
| Optimal orientation | East / North / West |
| General | |
| Typical usage average | Sun: 3.5 kVA · Night: 1.0 kVA |
| Dimensions (power cabinet) | W 640 x H 1464 x D 545 mm |
| Dimensions (battery cabinet) | W 640 x H 1464 x D 545 mm |
| Protection | IP55 rated, active controlled cooling |
Industries and Applications We Power
Full-size off-grid homes3-bedroom and larger households with air-conditioning, electric cooking and laundry.
Remote communitiesCommunity housing and essential services – our natural territory. Remote community power.
Government & council facilitiesRanger stations, community halls, clinics and remote offices that must stay powered.
Mining, agriculture & constructionRemote power stations, workshops, camps and pumping.
Demountable accommodationRemote worker villages and multi-building sites on a single system.
Emergency & resiliencePermanent power for the assets that must not go dark. Emergency & disaster response.
For Government, Councils and Large Organisations
The Mastiff is Maxxiom’s most-specified system for government and community work: remote housing, community facilities, ranger stations and essential services. Australian made in Brisbane, delivered with everything a procurement submission needs.Modular means redundancyAt Langarra in the Northern Territory the client first specified one large centralised system. We proposed ten modular units instead – no cranes or barges required, delivered under budget, and if one unit is serviced the community keeps its power. A centralised system is a single point of failure. Read the case study.
Australian made = local contentDesigned and manufactured in Brisbane, supporting Australian Industry Participation and sovereign supply-chain resilience. Not an importer.
Fuel-free operating costNo fuel logistics, refuelling labour or noise complaints. On a comparable Maxxiom deployment fuel use fell 100% in six months, saving up to $136 a day and 1.62 tonnes of CO2 a month.
Remote delivery is our specialtyLogistics planning, transport coordination, on-site deployment and culturally respectful engagement in Indigenous communities – with ongoing maintenance and monitoring.
Fleet visibilityGPS locator and 4G monitoring on every unit – location and state of charge before you dispatch a technician or a truck.
Resilience hardeningFit the assets that must stay live – evacuation centres, halls, clinics, water pumping. Earns its keep daily, proves itself in an event.
Frequently Asked Questions
Can the Mastiff run a whole off-grid house?
Yes – that is what it is built for. The 10 kVA inverter with 32 A primary and auxiliary outputs handles a 3-bedroom-plus household including air-conditioning, electric cooking, laundry and a workshop, with 22.5 kWh usable storage for overnight.
Can it run air-conditioning?
Yes. With 10 kVA nominal (5,700 VA continuous at 40°C) and 15 kW peak, ducted or multiple split systems are within scope. Air-conditioning is a heavy daily load though, so size the solar and battery accordingly – our sizing calculator will show the daily energy impact.
How much solar does the Mastiff need?
Up to 30 panels (440-510 W each) for 13.2 kW across four MPPT controllers, ideally split east, north and west so generation is spread across the whole day rather than peaking at noon.
How far can the battery be expanded?
From 25 kWh to 50 kWh using the Mastiff battery expansion cabinet (5 kWh modules). Additional external MPPT charge controllers can also be added.
What is the difference between the Mastiff and the Blue Heeler ‘EX’?
The Mastiff doubles the inverter (10 kVA vs 5 kVA), adds 32 A outputs, takes 13.2 kW of solar versus 5.2 kW, and starts at 25 kWh expandable to 50 kWh. Choose the EX for a 2-3 bedroom home; choose the Mastiff for a full-size home, community facility or high-demand site.
Do you supply to government, councils and remote communities?
Yes – it is a core part of our work. We have delivered off-grid and transportable power to Indigenous community housing, regional community infrastructure, government projects and civil contractors, with full procurement documentation, Licensed Electrical Contracting (QLD/NSW/NT) and comprehensive insurance. ABN 88 662 397 560.
Can you supply multiple units for a community project?
Yes, and it is often the better engineering answer. At Langarra we supplied ten modular units rather than one centralised system – removing the need for cranes and barges, coming in under budget, and ensuring servicing one unit never takes the whole community offline.
What happens when storage runs low?
Two things. The system sheds non-critical loads on the auxiliary output to protect essentials, and the built-in generator auto-start fires the generator to recharge, then shuts it down – all without anyone intervening.
Can I monitor it without internet or mobile coverage?
Yes. 4G monitoring is included for 12 months where there is coverage, but the Maxxiom Peer-to-Peer Wireless Display talks directly to the system with no internet or cellular at all – built for genuinely remote sites.
What warranty and support come with it?
Five years on power equipment and ten years on the battery. Because we manufacture in Brisbane, support, servicing and spare parts come from us – including remote-area service planning.
About Maxxiom Power Solutions
Maxxiom Power Solutions Australia designs and manufactures off-grid solar and battery systems in Brisbane, Queensland. We deliver turnkey solutions across engineering, fabrication, electrical installation, commissioning and long-term support, with particular experience in remote and regional project delivery including Indigenous communities. All works comply with AS/NZS 3000, 3001, 4509 and 5033, backed by a 5-year equipment and 10-year battery warranty.Service Areas
Maxxiom systems are designed and manufactured in Brisbane and supplied Australia-wide for regional and remote applications. Our licensed electrical team delivers installation, commissioning and ongoing support across Queensland, New South Wales and the Northern Territory – from South East Queensland acreage (Brisbane, Logan, Gold Coast hinterland, Ipswich, Scenic Rim, Toowoomba) to regional Queensland, the Northern Rivers of NSW, and remote Northern Territory communities reachable only by 4WD or small watercraft. Outside these areas we supply Australia-wide – ask us about delivery to your site.5-year power equipment warranty · 10-year battery warranty · Australian made in Brisbane
Request a quote
Download Mastiff MKII Specification Sheet
Download Dimensions of Mastiff
Download Electrical Diagram
Size your system with our calculator, or compare with the Blue Heeler ‘EX’.
