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Rental BESS Control Platform
Rental BESS control platformTake your rental fleet hybrid. Keep the gensets you own.
Cleaner, quieter and cheaper to run. ComAp's control strategy puts the battery first and the genset only where it is efficient, whether your fleet is ComAp-controlled, third-party or basic.
40–60%
typical drop in genset runtime hours on real site profiles
0
fuel burn, noise or emissions while the battery carries the load
3
configurations for ComAp, third-party and basic gensets
Indicative figures. Validate against your own fleet data before using them in firm commercial proposals.
Rental is changingFour pressures, one answer
Your clients want emission data, cities restrict diesel, neighbours want quiet nights and part-load fuel waste keeps growing. Hybrid power addresses all four.
01
Going green
“Send us your emissions data.”
Large EU companies must report Scope 3 emissions under CSRD, and your gensets are part of them.
02
Urban air quality
“Can your fleet enter the zone?”
Low- and Zero-Emission Zones are spreading to non-road machinery, including mobile gensets.
03
Noise
“Nothing running after 22:00.”
Night-time limits already exclude most diesel canopies. A switched-off genset is silent.
04
Efficiency and cost
“Why so much fuel for so little load?”
Below 30% load, fuel per kWh climbs and engines wet-stack. Most hours run below 50%.
The ComAp rental site strategyThe battery leads. The genset only works where it is efficient.
One control strategy keeps power stable and continuous by coordinating the BESS and the genset.
Genset offSTEP 1
BESS carries the site
The battery is the primary source and discharges as needed to keep the load supplied.
Genset startsSTEP 2
A threshold is reached
State of charge drops too low, or the load exceeds what the BESS can deliver. The genset starts automatically.
Genset onSTEP 3
Genset runs in its sweet spot
It supplies the load and recharges the BESS at the same time, in its optimal efficiency range.
Genset offSTEP 4
Battery takes over again
Once the BESS is recharged and can carry the load alone, the genset shuts down.
The cycle repeats automatically, and the genset runs only when the site needs it.Fuel burned per kWh depends on genset load
Specific fuel consumption (g/kWh) vs engine load. Indicative curve for a 400–700 kVA modern diesel genset.
Wet-stacking, below 30%Acceptable, 30–60%Sweet spot, 60–85%Over, above 85%
The fuel arithmetic
A 500 kVA genset running 6,000 hours a year at 30% average load instead of 75% wastes 15 to 20% more fuel. Here is what that adds up to across a fleet of 50.
Gensets in your fleet
50
€500,000–1,000,000
of fuel wasted per year at low average load
Diesel wasted per year350,000–500,000 litres
Per genset per year€10,000–20,000
Illustrative: 500 kVA genset, 6,000 h/year, 30% vs 75% average load, fuel at €1.50–2.00 per litre.
Three ways inWhatever gensets you own, there is a configuration for them
You do not need to replace your fleet. Pick the description that fits your gensets.
Option 1
Full ComAp solution
The BESS and the genset are both on ComAp controllers, coordinated by integrated power management.
BESS
InteliNeo 530 BESS controller, the primary source on site
Genset
Managed by an InteliGen controller, which keeps it in its optimal efficiency range
Grow
InteliMains adds grid synchronisation and parallel operation. InteliNeo 5500 or 6000 brings in PV for free-of-cost charging.
Monitor
The whole site, BESS, genset and connected sources, in WebSupervisor
Worth knowing: Requires the latest firmware on the ComAp controllers.
Option 2
Universal Genset solution
A ComAp BESS leads, and a third-party genset follows real-time setpoints over Modbus.
BESS
InteliNeo 5500 or 6000, issuing real-time Modbus commands to coordinate power levels and modes
Genset
Third-party controller supporting the Universal Genset function: Modbus, real-time PQ/VF setpoints and its own synchronisation
Grow
Renewables through the InteliNeo controller, and grid synchronisation with InteliMains
Monitor
BESS in WebSupervisor. The genset needs its own platform, or an InteliGateway for WebSupervisor.
Worth knowing: Communication setup and programming must be repeated for each genset model.
Option 3
Direct paralleling solution
A ComAp BESS paired with any basic or even analogue genset. Coordination happens through electrical measurements.
BESS
InteliNeo 530 BESS, issuing the genset start command and managing power flow and protections in islanded mode
Genset
Any basic prime-mover controller. It only has to hold stable voltage and frequency, with hardware Start/Stop and Ready-to-Load signals.
Setup
InteliNeo 530 BESS needs the genset's nominal and optimal power, and the BESS package measures power input from the genset
Monitor
BESS in WebSupervisor. The genset relies on its own monitoring system.
Worth knowing: Tuned for one BESS and one genset in islanded mode. No renewables, and it requires power measurement on the output terminal.
Built on InteliNeo 530 BESS and InteliNeo 5500/6000 for the battery, InteliGen for gensets, InteliMains for grid synchronisation and WebSupervisor for remote monitoring.
OEMs and BESS packagersBuilding BESS packages for rental companies?
You integrate the battery, power electronics and enclosure. ComAp brings the control platform that makes the package behave predictably on a rental site, whatever it is paired with.
Fit the fleet your customers already have
Three configurations cover ComAp, third-party and basic gensets, so your customers can go hybrid without replacing assets.
A genset-agnostic option
With direct paralleling, the InteliNeo 530 BESS coordinates through electrical measurements. The genset needs no Modbus, no PQ/VF command acceptance and no synchronisation, only stable voltage and frequency.
Standard setpoints, faster commissioning
Every configuration uses ComAp's standardised setpoint structure, so site behaviour stays predictable and repeatable across deployments.
A path to PV and grid
Add InteliNeo 5500 or 6000 to bring photovoltaic generation in for free-of-cost charging, and InteliMains for synchronisation and parallel operation with the utility grid.
Remote visibility
WebSupervisor gives your customers monitoring, event tracking and performance insights for the BESS and, depending on the configuration, the whole site.
Built for the rental duty cycle
BESS-first operation answers the four pressures rental customers face: reporting, urban air, noise and fuel cost.
Tell us what your fleet looks like. We'll help you match the configuration.
A short conversation is enough to find the right starting point.
›Which of the three configurations fits your gensets
›What the genset side needs for Universal Genset or direct paralleling
›How to plan for PV, grid synchronisation and remote monitoring later
Start the conversation
Tell us which gensets you run and what you want to achieve. A ComAp expert will get back to you with a configuration that fits.
Talk to a ComAp expertFigures on this page are indicative and based on the ComAp white paper “The Rental Market is Changing”. They should be validated against fleet data before being used in firm commercial proposals. The BESS control mode is expected to be Virtual Synchronous Generator (VSG). Configuration requirements, including firmware versions, apply as described for each option.