Adding solar or batteries to a diesel site should cut fuel use. On many sites it does not cut it nearly as much as expected, and the reason is usually simple: nobody can see, in real time, why the generator is running.
Key takeaways
- Most wasted diesel on hybrid sites comes from faults and settings nobody sees, not from a lack of solar.
- Logging every generator start with its reason is the fastest way to find savings.
- Live alerts and remote setpoint changes cut fuel without sending technicians to site.
- On hybrid sites, NeoTAQ customers have cut diesel use by up to 70%.
What is a hybrid power site?
A hybrid power site combines two or more sources of power with a diesel or gas generator. Typical mixes include solar PV and batteries, wind turbines, gas turbines or gas gensets, and the grid where one exists. You find them at telecom towers, factories, farms, mines, hotels and remote communities.
Each device usually has its own controller, its own screen and its own brand. Fuel gets burned in the gaps between them.
Why generators run more than they should
- A tripped inverter. Solar drops out and the generator quietly picks up the load until someone visits.
- A weak or badly configured battery. The battery cannot carry the evening load, so the generator starts early every night.
- Conservative setpoints. Start and stop thresholds set at commissioning are never revisited.
- Oversized generators running at low load. Light loading wastes fuel and wears the engine.
- No one notices. Without live data, the first sign of trouble is the monthly fuel bill.
Seven ways to reduce diesel consumption
- See every source on one screen. Solar, batteries, turbines, grid and generator, from any brand, in one view. You cannot fix what you cannot see.
- Log why the generator starts. Record every start with its trigger: low battery, low solar, high load or a fault. Clear patterns usually appear within weeks.
- Get alerts the moment something trips. An inverter fault found in minutes saves days of unnecessary generator running.
- Tune setpoints remotely. Adjust start and stop thresholds, battery limits and solar priority from the control room instead of sending a technician.
- Use the battery properly. Set charge and discharge windows so the battery covers the hours the generator would otherwise run.
- Right-size the running generator. On multi-genset sites, run the set that matches the load and keep it in its efficient range.
- Measure fuel, not just power. Track litres used per site and per day, so every improvement shows up as fuel saved and theft or leaks stand out.
What this looks like with NeoTAQ
The neoCore controller sits on site and connects to inverters, battery systems, generators, turbines and meters from different brands. Control logic runs locally, so the site keeps working when connectivity drops. Data flows to neoSphere, where operators see every site, get alerts and change settings remotely. For sites with storage, neoES manages battery charge and discharge to keep generators off for longer.
On hybrid sites, this approach has cut diesel use by up to 70%. See how NeoTAQ runs an off-grid solar, battery and generator site in Sharjah, where the generator starts only to protect the battery reserve.
How much CO2 does it save?
Burning one litre of diesel releases roughly 2.7 kg of CO2. Every litre a site does not burn is measured and logged, so fuel and emission savings are reported from real data rather than estimates.
Frequently asked questions
Does this work with the equipment we already have? In most cases, yes. neoCore talks to common industrial protocols, so existing inverters, battery systems and generator controllers can be connected without replacing them.
What if the site has poor connectivity? Control runs locally on the controller. Data is stored on site and sent when the connection returns.
Is this only for solar and diesel? No. The same approach covers batteries, wind turbines, gas turbines and gensets, and grid connections.
How quickly can we see savings? Many sites find their first fixes, such as a tripped inverter or a wrong setpoint, within the first weeks of monitoring.
Running hybrid sites and want to know where your fuel goes? Explore our energy solutions or book a demo.