SPL Energo — Poustka
A 2 MW battery storage + photovoltaic site in northwest Bohemia. Twelve Modbus devices, three vendors, one operator. Live on ECC since November 2025.
The site
SPL Energo operates a 2 MW battery storage system collocated with photovoltaic generation. The site uses Sinexcel PWS1-500KTL-P power conversion systems, a CATL EnerOne+ battery management system, ABB REF615 protection relays on the feeder and battery sides, and three ABB SACE Emax 2 low-voltage circuit breakers on the transformer secondaries. A Sungrow Logger 1000B aggregates the PV inverter data. Communication uses Modbus TCP on a 192.168.5.0/24 site network.
Before ECC
The site was monitored only through each vendor's local HMI, meaning the operator had to drive to site to investigate anything. No remote alarm path. No central place to compare PCS output against PV generation against battery state of charge. When the PCS reported a fault, the operator received a generic SMS from the vendor's gateway and had to call the integrator to interpret the fault code.
Within the first week of operation, ECC's bitfield decoder for the Sinexcel PCS surfaced a register-mapping mistake in the original integration: a bit labelled "BMS communication fault" was actually the "grid-tied" status flag — a healthy state that had been firing nuisance alarms for three weeks. Fixed in version 1.8.3.
Today
- Continuous polling of 188 registers across all 12 devices, with telemetry pushed to the cloud every 30 seconds.
- Real-time alarm management with severity classification, ML-prioritised noise reduction, and automatic resolution when values return to normal — the original 371 duplicate fault events per day are now collapsed into one event with a change history.
- Remote command capability for power setpoints and start/stop of the PCS, rate-limited and audited.
- Custom dashboard layout for the site, with separate views for the on-call operator and the SPL Energo management team.
Engagement
Paid arrangement, single-site reference customer. SPL Energo has reference rights with one quote per quarter; site name and device count cleared for public disclosure.
“The dashboard tells us within seconds what previously took a site visit to find out. Worth the subscription on day one.”
— Site engineer, SPL Energo
Next
After 12 months of telemetry collection (Q4 2026), Poustka becomes the first site for Tier 2 predictive modelling on the CATL cells and IGBT wear modelling on the PCS modules. Tier 3 dispatch optimisation targeted for Q1 2027 pending ČEPS accreditation.