Ground-mount farm
Legnica — 2 MW
A 2 MW farm with two transformer stations and a non-standard control architecture. Suntrio inverters with a custom controller — a setup rarely seen on the Polish market. Other firms refused to take on the work.
48 sites — 100% success rate.
We conduct NC RfG testing, prepare the final report and coordinate the procedure with the DSO — through to FON issuance for your Type-B PV farm (0.2–10 MW).
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Tauron Dystrybucja S.A. -
PGE Dystrybucja S.A. -
ENEA S.A. -
Energa-Operator S.A.
About
BMC — your trusted FON specialist
We deliver the entire procedure for obtaining the Final Operational Notification (FON) for Type-B PPM.
If your PV farm build is wrapping up and the OSD makes acceptance conditional on FON — you're in the right place. EPC firms and asset owners come to us when the deadline is closing in and NC RfG testing is the missing piece. We take it on and guide you through, step by step.
Type-B PPM covers MV-connected installations from 0.2 to 10 MW. We specialize exclusively in PV farms — a narrow specialty means deep knowledge.
- 48 sites*
- 100% success rate
- 5 years experience
* as of January 2026
What sets us apart
Transparent contract
Clear terms and scope, start to finish.
Constant contact
We keep you posted at every stage — we don't disappear once the contract is signed.
A proven process
A proven process, tested time and again.
Real-world results
Concrete projects behind us — we know how to see a case through to the end.
Exceptional cases
We take on complicated cases too — we won't send you away with your problem.
All Polish DSOs
- Tauron Dystrybucja S.A.
- PGE Dystrybucja S.A.
- ENEA S.A.
- Energa-Operator S.A.
and other operators
Inverters & equipment
- Huawei · Sofar · SolaX · SMA · SunGrow
- Kehua · Suntrio · Fronius · Hoymiles
Reactive power compensation, power guards, custom controllers — none of these are blockers.
Who we work with
We work for EPC firms and plant owners
- EPC firms and main contractors
We take FON off your plate so you can focus on the next project.
- Asset owners
When your contractor didn't handle FON or lacked the expertise.
- Investors and SPVs
When the deadline is closing in and other firms decline the job.
FON Process
How to obtain FON — and why you shouldn't wait.
Without FON your installation runs only on borrowed time — and at risk.
FON (Final Operation Notification) is the closing operational notice issued by the Distribution System Operator (DSO) once your installation passes the NC RfG Network Code compliance tests. It is formal confirmation that the installation meets every technical requirement of the grid.
Until it is granted, the installation runs only on a temporary permit (ION), within a fixed time window. Once that window closes, the DSO has the right to disconnect the installation and impose penalties.
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Commissioning ION
You are here 12–24 mo. windowThe installation is connected to the grid and granted a temporary permit (ION).
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Contact us and case review
You send us the documentation (IWR, WP, executive design). We assess the test scope and prepare an offer.
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Contract & HPiT preparation
After you accept the offer we prepare the Test & Trial Schedule and agree it with the DSO.
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On-site testing
up to 2 wkWe mobilise to the site and run NC RfG tests per the approved HPiT.
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Report & DSO submission
up to 1 mo.We compile the full test report and submit it to the DSO together with the PGMD document.
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DSO coordination FON
We coordinate every exchange with the DSO until FON is issued and keep you updated throughout.
FON granted
The installation is fully accepted and NC RfG-compliant — no risk of disconnection or penalties.
Don't wait until the last minuteThe areas we test Want to know more?
This is background knowledge — you don't need it to use the service.
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Power quality
Parameters at the connection point: voltage, frequency, harmonics, flicker.
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Frequency response
LFSM-O mode — power reduction as frequency rises.
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Active power control
Ability to curtail production on DSO request.
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Reactive power control
cos φ and reactive power regulation on DSO request.
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Fault ride-through (FRT)
Staying online through grid voltage dips.
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DSO communication
Remote control and data exchange capability.
Other tests, specific to each installation
Projects
Our projects — 100% success rate across Poland
* Marker positions on the map are approximate and do not reflect actual locations. Exact addresses are not published for security reasons.
- PV farm
Medical facility
Płońsk — medical facility
A PV installation serving a medical facility — a sensitive site with continuous-power requirements. Coordinating test windows with the facility's operating schedule was critical.
Industrial installation
Tarnów — production plant
A facility with high self-consumption and a reactive-power challenge. The DSO-mandated cos φ regulation required precise configuration of SunGrow inverters and the management system.
Services
End-to-end or piecewise — whichever you need
We run the entire FON procedure — from the first review to the issued document. Only need the one stage you're missing? We'll handle that too.
End-to-end offer
FON delivery — end-to-end (A to Z)
- Documentation review (IWR, WP, executive design)
- HPiT preparation and DSO agreement
- On-site NC RfG testing
- Final report compilation
- Report and PGMD submission to DSO
- DSO coordination through to FON issuance
Or just the missing piece
Already part-way through? Step in at any point:
HPiT schedule
When you have a tester but need the HPiT.
Preparing and agreeing the schedule with the DSO based on technical documentation.
NC RfG tests
When the HPiT is ready and you need a testing partner.
Field testing on the basis of an approved schedule.
Final report
When the tests are done and you need a professional report.
Compiling a complete test report ready for DSO submission.
Other services
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PV O&M
Operations and maintenance of PV farms — monitoring, diagnostics, interventions.
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Active-power control
Configuring control algorithms for negative-price hours. Protect against losses.
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IWR updates
Updating the Operating Instructions after upgrades or changes in conditions.
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Technical consulting
One-off or recurring consultations on NC RfG, FON and installation parameters.
Client reviews
What clients say about working with us
Words from the EPCs, plant owners and investors we've taken all the way through the FON process.
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The ION deadline was closing in and two other firms had turned us down. BMC took the whole thing end to end — tests, report and OSD coordination. FON granted on time.
Plant owner · 4 MW PV farm -
As an EPC we handed FON over to them and got back to the next project. Constant updates, no surprises.
Project manager · main contractor -
Non-standard control and reactive-power compensation were no obstacle. A professional approach and complete documentation for the DSO.
Investor · industrial installation
FAQ
Frequently asked questions
Basics — FON and NC RfG
What is the FON document?
FON (Final Operational Notification) is the formal document issued by the Distribution System Operator. It confirms the installation meets the NC RfG Network Code and transitions the asset from the temporary (ION) state to full operation.
Why do I need FON?
It is required by EU Regulation NC RfG (2016/631). Every new generation unit — including Type-B PPM — must prove it can operate safely within the grid. FON is the certificate of that compliance.
When do I need FON?
After commissioning, the asset operates under a temporary permit (ION). You typically have 12–24 months to run the tests and obtain FON. The exact deadline comes from the connection agreement.
What happens if I miss the deadline?
The DSO has the right to disconnect the installation (no production, no energy sales) and impose contractual financial penalties.
What are NC RfG tests?
A set of measurements and trials confirming the installation meets the DSO's technical requirements. They cover active and reactive power control, DSO communication and behaviour during grid disturbances. Real on-site tests — not declarations.
Timing and scheduling
How long does on-site testing take?
Under normal weather conditions — up to 2 weeks.
I'm short on time — what should I do?
Get in touch as soon as possible. Even with tight deadlines we'll work out a plan together. Don't waste time searching — call today.
Technical
I have a non-standard setup — can you help?
Yes. We've tested various inverter brands (Huawei, SunGrow, Sofar, Suntrio, Kehua, Fronius, Hoymiles, SMA and others). Reactive-power compensation, power guards, custom controllers — all familiar territory.
Which tests apply to Type-B PPM?
The scope depends on technical documentation and the DSO, but typically covers: power-quality parameters at the connection point, active and reactive power control, and DSO communication confirmation.
Working with us
Do you operate across Poland?
Yes. We've delivered tests in every voivodeship. The distance between our most-distant projects is roughly 751 km.
How much does FON cost?
We approach every project individually because the test scope and complexity vary. Free quote after a documentation review.
What's your experience?
We've been doing NC RfG testing since 2021. By 1 January 2026 we had delivered 48 projects across Poland. Every one received FON — 100% success.
How should I prepare for the free consultation?
All you need is: site location and rated power, the technical setup and roughly how much time is left from ION. We'll work out the rest together.
Free consultation
Find out what's coming next for your installation — and what to do about it.
First contact is a free consultation, no strings attached.
Together we'll:
- Assess where the installation stands and how much time is left to FON
- Identify which test scope you'll need
- Sketch a workable plan
You don't need to know NC RfG. Describe your installation and roughly how much time is left to FON. We'll handle the rest.