You already have a plant with a battery
We add the optimiser above your existing controller and connect to the battery and the inverters you have, over Modbus and OPC UA, from any vendor. Nothing that works gets replaced.
Weeks
Energy asset control
Every fifteen minutes, a decision for your plant.
Every fifteen minutes BESS Optimizer decides what your PV and battery plant does, from the day-ahead prices, the production forecast and the plant's own limits. We add it above the controller you have, or deliver it with the cabinet, a Schneider Electric PLC and a Comex IPC. Any battery, any inverter.
Proof you can check
- Schneider Electric integrator
- CertifiedSchneider Electric integrator
- years in industrial automation
- 15+years in industrial automation
- projects delivered
- 50+projects delivered
- plants under Comex price control, one with storage, and ours
- 4plants under Comex price control, one with storage, and ours
Start here
Two ways in.
You are building one
We supply the control point: the cabinet, a Schneider Electric PLC, a Comex IPC, the networking, BESS Optimizer and the commissioning. The battery and the inverters come from the vendor you choose.
Months, set by construction and grid energisation
BESS Optimizer
What it plans, and what it plans from.
A linear programme decides, for every fifteen-minute slot of today and tomorrow, whether the plant charges, discharges, holds or curtails. It is deterministic: the same inputs give the same plan, and every decision can be read back afterwards.
- Prices: the day-ahead curve for your market, at fifteen-minute resolution
- Forecast: production from weather and irradiance, scored against the plant's own pyranometer to pick the best model
- Limits: state of charge, inverter bounds, export limit, and the cost of a battery cycle
Raduša yields about 30% more revenue than the same plant selling without our BESS Optimizer. Dispatch runs automatically; the operator can take manual control when the plant needs it.
The public dashboard publishes that comparison daily: the same plant, with the optimiser and without it, against the same market prices.
See today's result on the Raduša dashboardBehind the meter
A business with its own PV is the same problem, smaller.
A factory or a warehouse with rooftop PV and a battery faces the same fifteen-minute decision as a plant: charge from the roof or the grid, cover the evening from the battery, stay under the connection limit, and never pay for a cycle that does not earn one. The optimiser plans it from your tariff, your load and your production, and the control cabinet carries it out. In 2026 Croatia and Slovenia opened grant schemes for businesses adding a battery to existing PV; the case is strongest where power is dear and the roof is already there.
- Tariff windows and peak charges, not only the exchange price
- Self-consumption first; export only when it pays
- The connection limit respected on every slot
- Several sites under one view, if you run more than one
Start here
Two problems we solve. Pick yours.
Negative-price curtailment
Stop exporting when the day-ahead price goes to zero or below. No battery required.
BESS integration and optimisation
The control layer between the market and your battery plant, supplied with the hardware and the commissioning.
You are here
Scope
What one contract contains.
Which layer we supply and which stays yours, line by line — including the ones we deliberately do not take on.
| Layer | Supplied by Comex |
|---|---|
| BESS Optimizer | Dispatch plan every fifteen minutes, forecasting, market data, monitoring, alerting |
| Industrial PC | Fanless x86 node at the plant running the optimiser and the gateway |
| Controller | Schneider Modicon M262, IEC 61131-3 program, OPC UA server, when the plant has none we can use |
| Cabinet and wiring | Pre-wired, tested, DIN rail |
| Networking | Private VPN, mutual TLS per site, outbound connections only |
| Commissioning | Site works, sign-off, operator handover |
| Battery and inverters | Yours, from any vendor. We connect to them over Modbus and OPC UA; we do not supply them |
| Plant controller | Whichever controller the grid code requires is integrated, not replaced |
What we ship
The control cabinet, not the battery.
We do not sell battery systems. The battery and the inverters are yours, from the vendor you choose, and different vendors can sit under the same control point. What arrives from us is the cabinet: a Schneider Electric PLC, a Comex IPC, the networking, pre-wired and tested, then commissioned against your connection conditions.
Vendor-agnostic by design
We do not sell the battery or the inverters, so we have no reason to prefer one make. The control point speaks the protocols the equipment already has, and different vendors can sit under one plan.
- Battery systems and their BMS over Modbus TCP or OPC UA, any make
- PV inverters over Modbus; INVT through Solarman loggers is proven in the field, other families after a register check
- Existing plant controllers integrated, not replaced; Schneider Modicon supplied where the plant has none
- Mixed fleets: one optimiser, one dashboard, several vendors
Our own storage at Raduša: the battery is the vendor's, the control on top of it is ours
Inside the Raduša container, racked and cooled for continuous duty
Installed beside the array and tied into the plant through the control point
The system
Built to industrial control standards, not cloud-software ones.
The controller is the authority
The plant's controller runs the plant. Everything above it, including our cloud, is advisory.
A local copy of the plan
The Comex IPC at the plant holds the schedule and the configuration, so a lost link changes nothing about what the plant does next.
Three-layer fail-safe
Broker-side last will, a cloud watchdog, and a controller-resident fallback that zeroes setpoints and holds charge. Verified by pulling the link.
Read before act
Every setpoint is checked against inverter bounds and state-of-charge limits before it is written, verified after, and logged with who and when.
One-second telemetry
Power, state of charge, import, export, production and alarms, retained and queryable for any past interval.
Private networking
Mutual TLS per site from our own certificate authority, outbound connections only. No inbound ports at any plant.
Proof
Look at a plant we own, running now.
Raduša is our own solar plant with a battery of about 300 kWh and 125 kW. Our solutions are tested and verified on plants we own, and the monitoring that shows them running is public.
Open the Raduša dashboard
Read-only. It shows the plant as it is, including the days it does something we did not expect.
Continuity
What happens to your plant if something happens to us.
It is a fair question to ask a company of our size, and the answer is contractual rather than reassuring: source code in escrow with release on defined events, interface and protocol documentation delivered with the plant, and a written handover procedure. Underneath that, the control path runs on open protocols end to end, OPC UA to the controller, MQTT over TLS to the broker, Modbus to field devices, so another competent integrator can take it over.
Taking a battery into NOSBiH's balancing market? That is a different programme: what is already proven on plants, what still has to be built for aFRR, and how long that takes.
Read the capability dossierPDF, Rev C, 10 September 2026.
Proof, not projection
0 min
unplanned downtime during the changeover
At RMU Kakanj we rebuilt control, motor starting and supervision across two coal lines — without stopping production once.
Read the case studyBuilt on industry-standard components
- Schneider Electric
- Teltonika
- Intel
- Oracle Cloud
- Mean Well
Nothing proprietary on the wire: OPC UA, MQTT over TLS and Modbus end to end.
On site
The same crew that builds and runs our plants
Our engineers install and commission on site, or a local contractor follows our specification. Either way we stay with you to the end.
Questions we actually get
- Do you work with our existing inverters and batteries?
- Yes, and that is the point. We do not sell batteries or inverters; we connect to whatever your vendor supplied, over Modbus and OPC UA, and we can run different vendors under one control point. Nothing that works has to be replaced.
- Can we have the optimiser without new hardware?
- If your plant already has a controller we can reach, yes. The optimiser runs on a Comex IPC we add at the plant and writes its plan to the controller you have. If there is no controller, or it cannot take an external setpoint, we supply the control point as well.
- Do you supply the hardware too, or only software?
- Both, as one contract when you need it: a Schneider Electric PLC, a Comex IPC, the cabinet, the networking, the commissioning and the software that runs on it. Most optimisation vendors never touch the plant, and most integrators do not model the market.
- What does it cost?
- It depends on scope, and we quote against a plant rather than a price list. Adding the optimiser above an existing controller is the smaller engagement; a full control point for a plant under construction is the larger one.
- How long does it take?
- Above an existing controller: weeks. A full control point for a new plant: months, and the schedule is usually set by construction and grid energisation rather than by us.
- What happens when the connection drops?
- The plant carries on. The controller holds the current plan and the fail-safe logic locally; our cloud is advisory, and its absence is not an outage.
- Are you certified?
- We are a certified Schneider Electric integrator with fifteen years in industrial automation. Grid-code component certification is not something we hold today, and we would rather say so here than surprise you at commissioning.
For EPCs and integrators
You keep the customer. We supply what is behind the battery.
If you sell and install storage, the optimiser and the control point are the part your battery vendor does not give you and your customer will ask about. We deliver them to your specification or ours, commission with your crew or ours, and stay out of your customer relationship. Ask for the partner scope and the commissioning checklist.
Talk to an engineer
Start with the plant you have, or the one you are planning.
Tell us the project stage, the connection status and the size if you know it. An engineer replies, not a sales sequence, and the first answer is whether we are the right contractor for it.