Diesel Generator + Solar Backup for Mining: A Practical Guide for Australian Sites

On most remote Australian mines, power still comes from diesel generators sized for the worst moment of the day and then left running through every other moment. A hybrid system keeps the generator but changes its job: solar carries the daytime load, a LiFePO4 battery carries the night and the quiet hours, and the engine starts only when it can do useful work at a sensible load. This guide explains how that works on a mine site, walks through a 24-hour camp example with stated assumptions, and shows which AB-iPower systems fit which loads.

The diesel-only problem on Australian mine sites

A diesel-only setup is simple to understand and easy to hire, which is why it is still the default on exploration camps, haul-road infrastructure and smaller processing sites. The trouble starts once you look at how the load moves across a day.

Low load overnight

A generator has to be sized for the peak: the evening kitchen rush, the crusher start, the workshop compressor kicking in while the air conditioning is already running. For the other twenty-odd hours the same engine often turns at a fraction of its rating, carrying a few lights, fridges, comms and a handful of occupied rooms. Diesel engines are not built to live there. Running lightly loaded for long periods leads to wet stacking, where unburnt fuel and carbon build up in the exhaust, glazing and fouling follow, and the engine needs more attention than its hours suggest.

Fuel logistics

Every litre burned on a remote site has to be bought, trucked in, stored, logged and dispensed. On long supply chains, often over unsealed roads that close in the wet season, fuel is a logistics task as much as an energy cost. A camp that burns diesel all night to power a small load is paying for trucks, tanks and handling time as well as the fuel itself.

Maintenance hours and noise

Service intervals follow engine hours, not useful energy. A generator idling overnight racks up hours, oil changes and filter swaps just as fast as one working hard. And a generator running next to accommodation is a constant noise source for people trying to sleep between 12-hour shifts.

How a hybrid diesel + solar + battery system works

A hybrid energy storage system (ESS) combines a battery bank, a power conversion system (PCS), solar inputs and a diesel generator under one energy management system (EMS). The EMS decides, second by second, which source carries the load:

1. Solar by day. The PV array supplies the load directly and any surplus charges the battery.
2. Battery at night and at low load. When solar drops away, the battery takes over. Overnight camp loads, comms and lighting run on stored energy with the engine stopped.
3. Generator on demand. When the battery reaches its set point, or a heavy load needs more than the battery and PCS can give, the EMS starts the generator. It runs at an efficient load, covering the site and recharging the battery at the same time, then stops.
4. Parallel mode for peaks. For short heavy peaks, generator and battery run in parallel. On the VMHV160K3 this is how a 100 kW PCS and a 100 kVA genset together reach the 160 kW system rating.

The result is fewer engine hours, each of them spent working rather than idling. For a deeper walk through a camp built around one unit, see how to power a remote mining camp with a 160 kW hybrid ESS.

The VMHV160K3 combines a 225 kWh LiFePO4 battery, a 100 kW PCS, four MPPT solar inputs and a 100 kVA Perkins generator in one unit.

A worked example: 24 hours at an exploration camp

The figures below are illustrative. They show the logic, not a guaranteed result for your site.

Assumptions:

• One VMHV160K3: 225 kWh battery, 100 kW PCS (120 kW for one minute), 100 kVA Perkins generator.
• A 50 kW solar array, matched to the unit’s 50 kW DC/DC input, assumed to deliver 250 kWh on a clear day. Real yield depends on your location and season and is calculated during sizing.
• Generator output taken as about 80 kW when running (100 kVA at a 0.8 power factor).
• A reserve of around 65 kWh is kept in the battery. Conversion losses are ignored for clarity; a real sizing study includes them.

Time	Camp activity	Average load	Energy	Supplied by
22:00–06:00	Night: rooms, fridges, comms, security lighting	20 kW	160 kWh	Battery only, generator off
06:00–08:00	Shift change: kitchen, hot water, crib rooms	45 kW	90 kWh	Generator, with 70 kWh surplus into the battery
08:00–16:00	Day shift on site: office, workshop, partial camp	30 kW	240 kWh	Solar, small surplus into the battery
16:00–22:00	Crews return: kitchen, laundry, air conditioning, peaks near 100 kW	60 kW	360 kWh	Generator about 5.5 h at efficient load, battery in parallel for peaks, battery topped up

Across the day the camp uses about 850 kWh. Solar supplies about 250 kWh and the generator about 600 kWh, in roughly 7.5 running hours. The battery goes from its reserve at 06:00 to full at 22:00 and carries the whole night.

Now compare the diesel-only version. A generator sized for the same 100 kW evening peak runs all 24 hours, and spends eight of them carrying 20 kW. That is the low-load running that causes wet stacking, and those overnight hours count toward every service interval. In the hybrid case the engine runs about a third of the day, always at a useful load, and the camp is quiet from 22:00 to 06:00.

Choosing the size

Two numbers decide the platform: your continuous load and your peak, including motor starting. The table is built from the product datasheets.

System	PCS / rated power	Battery	Generator	Solar input	Format, weight
VTS20P ESS	30 kVA, three-phase	51.2 kWh LiFePO4	35 kVA Hatz	20 × 450 W panels on board (9 kW)	Compact unit, 4 per 40 ft container
VMHV160K3	100 kW (160 kW system)	225 kWh LiFePO4	100 kVA Perkins	50 kW, 4 MPPT	Trailer, 6 t
VMHV180K3	125 kW (180 kW system)	241 kWh LiFePO4	100 kVA Perkins	62.5 kW, 4 MPPT	Enclosure, 5.7 t
VMHV500K3	250 kW	482 kWh LiFePO4	250 kW Perkins 1706J	4 MPPT, up to 1,100 V	20 ft container, 15 t

As a rough guide, the VTS20P ESS suits drill-rig camps, comms and small exploration setups. The VMHV160K3 and VMHV180K3 cover camps, workshops and mixed site loads up to about 100 to 125 kW continuous. Once pumps, crushers or conveyors dominate the load, start at the VMHV500K3, or at the 500 kW VMHV1M3 for larger processing loads. Our 500 kW vs 160 kW project scale guide goes through that decision in detail, and what to look for in a mining hybrid ESS covers the buyer checklist.

Site practicalities in Australia

Getting it there

The VMHV160K3 is built on a heavy-duty trailer (3,320 × 2,170 × 2,230 mm, 6 t) and ships one per 20 ft container or three per 40 ft. Once landed it can be towed to site and moved again when the exploration program shifts. The VMHV500K3 is a 20 ft container at 15 t, so plan for a crane or heavy forklift and a level, compacted pad. If you need power running within days of arrival, read our notes on rapid-deployment hybrid power for temporary mine sites.

Heat and dust

Battery operating ranges are -20 °C to +50 °C on the VMHV160K3 and VMHV180K3, and -30 °C to +65 °C on the VMHV500K3. Inland summer heat still deserves respect: site the unit where it gets airflow, keep it out of the haul-road dust plume and add filter and intake checks to the service routine. The VMHV180K3 and VMHV500K3 gensets are liquid-cooled, and a generator that runs fewer hours has fewer hours of dust pulled through it.

Noise near camp

All of these gensets are rated at 75 dB(A) at 7 m when running. The bigger gain is that on most nights they are not running at all, because the battery carries the low overnight load.

Remote monitoring

The VMHV160K3, VMHV180K3 and VMHV500K3 include 4G monitoring, so the site electrician or the office can follow energy flows, alarms and generator starts without driving out to read a panel.

Total cost of ownership: what changes

We are not going to quote a percentage saving here, because it depends on your load, your solar resource and what diesel costs you delivered to site. What changes is easy to list:

• Litres burned. Daytime solar and battery-only nights remove the hours when the engine was burning fuel for very little output.
• Service intervals. Fewer engine hours mean oil, filter and major services come around less often, which matters when each visit is a long drive or a flight.
• Refuelling trips. Lower consumption stretches the time between deliveries from the same tank: 680 L on the VMHV160K3 and VMHV180K3, 1,000 L on the VMHV500K3.
• Engine condition. Running at a healthy load instead of idling reduces the wet-stacking problems that shorten engine life.

To put numbers on your own site, use the fuel savings calculator, and see how much diesel a hybrid solar-battery system can save for the method behind it.

An Australian customer reviewing VMHV switchgear, busbars and transfer switch before shipment.

Ordering and inspection

AB-iPower has built power equipment since 2003, factory-direct from our own plants in Chongqing and Zhejiang, so you deal with the engineers who build the unit rather than a trading company.

• Minimum order: one unit, with a 5 % discount from eight units.
• Payment: 30 % deposit, balance before shipment.
• Incoterms: FOB or CIF.
• Production time: 15 to 45 working days, depending on model and quantity.
• Inspection: visit the factory, or ask for a live video call from the workshop floor with your unit running.

Australian buyers do use that inspection step. Our repeat customer RenewaGlobe flew to the factory in August 2026 to check its next VTS solar hybrid trailers and a VMHV hybrid ESS before packing, from frame welds and battery fixing to the switchgear. Read the RenewaGlobe factory visit to see what they checked.

Next step

Send us your site’s load profile, or even a rough list of what runs and when, plus your current generator size and fuel use. Our engineers will propose a configuration and reply within 24 hours. Request a quote.