BESS Projects, Battery Systems & Energy Storage Services for Sale

LSG Group GmbH (LSG Building Solutions) is a privately owned, multi-domestic engineering and construction group headquartered in Vienna, Austria, ~400 employees, permanent operations in Austria, Croatia, Romania, Bulgaria, Serbia, Macedonia and Moldova. Full life-cycle EPC partner: consulting, project development, design, construction, O&M. Track record — BESS & hybrid power plant projects: - Izvoarele 2 HPP, Romania, 2026 — 160 MWh BESS (LFP) + 50 MW PV — EPC. >€20M investment, grid ancillary services (FCR/aFRR/mFRR) for Romania's TSO. - BESS Senyo, Hungary, 2024–2025 — 115 MWh BESS (40→115 MWh expansion) + 20 MWp PV — EPC. BESS containers by HITHIUM. - Glyptodon / CEM Carani HPP, Romania, 2024–2025 — 68.8 MWh BESS + 56 MWp PV — EPC. First hybrid power plant of its kind in Romania, currently in aFRR qualification. Beyond BESS, LSG has delivered 60+ solar PV projects since 2011 across Austria, Hungary, Bulgaria, Romania and beyond, totaling over 2,100 GWh of installed renewable generation. Vendor-neutral — worked with multiple battery suppliers (Trina Storage, HITHIUM). Open to EPC, engineering and O&M mandates on BESS and hybrid projects across Europe.

Wattrix (BEG Wattrix e.Gen.) is a registered citizen energy community (Burgerenergiegemeinschaft) supplying renewable electricity across Austria. We aggregate distributed solar generation today, with wind and hydro assets joining the community in 2026, and dynamically redistribute electricity among members every 15 minutes at flat, transparent rates (9.5 ct/kWh for consumption, 8 ct/kWh for feed-in). As we scale toward maximum self-sufficiency for our members by 2027, battery storage is a natural next step: it lets us shift surplus renewable generation to periods of peak community demand, smooth the mismatch between intermittent PV/wind/hydro output and consumption, and further reduce our members' reliance on the wholesale market. We're open to hearing from BESS project developers, asset owners and hybrid (generation + storage) project developers in Austria interested in exploring integration or off-take partnerships with our community, as well as from BESS system suppliers who want to understand community-scale storage use cases. Get in touch to discuss. Vendor-neutral - not affiliated with any equipment manufacturer or EPC contractor.

AROU is an independent law firm based in Kyiv providing legal due diligence for energy and renewable energy projects, including BESS and hybrid developments, across Ukraine, Austria and Slovakia. Our review covers land and permitting status, corporate and ownership structure, existing project contracts (EPC, PPA, grid connection, green tariff agreements), regulatory compliance, and litigation/dispute history ahead of acquisition or financing. We also handle contract drafting and dispute resolution — including, for Ukrainian projects, green tariff non-payment claims and international investment protection. Client service available in English, Slovak, Ukrainian and Russian. Engaged directly by buyers, investors and developers. Vendor-neutral — no ties to any equipment supplier or EPC contractor.

Energy storage finance advisory boutique. Services: debt structuring for BESS projects (senior, mezzanine), equity placement, revenue contract review, lender technical advisory, financial model audit. Closed €320M in storage financings across EU. Network includes 15+ active infrastructure lenders with storage mandates. Mandates from 20 MW upwards.

Specialist regulatory advisory firm covering grid connection permitting, BImSchG environmental approval, and energy storage regulation in Germany, Austria and Switzerland. Deep knowledge of §14a EnWG, NABEG grid expansion, network charges for storage. Track record: 50+ successful grid connection applications. Fixed-fee and retainer engagements available.

Specialist BESS O&M provider with 1.8 GWh under management across UK and EU. Services: 24/7 remote monitoring and dispatch, preventive and corrective maintenance, cell and module replacement, BMS/EMS firmware updates, performance reporting. SLA-backed 4-hour response for critical faults. Vendor-agnostic platform supports all major BESS OEMs.

Full-service EPC contractor specializing in utility-scale BESS projects across Europe. Track record: 800 MWh delivered in last 3 years. Services: civil works, MV/HV electrical installation, BESS container installation, grid connection works, SCADA integration, grid code compliance testing, FCR/aFRR pre-qualification. Bankable contracts with performance bonds. ISO 9001 certified.

Independent BESS development and advisory firm based in Vienna. Services: site identification and screening, grid feasibility studies, revenue modelling, technology selection, procurement support, lender technical advisory (LTA). Served 30+ clients across Central Europe since 2019. Vendor-neutral approach — no equipment supply conflicts.

EPC contractor specializing in utility-scale BESS in CEE. Markets: PL, CZ, SK, HU, RO. Services: civil, electrical, BESS installation, grid connection, commissioning. Track record: 600 MWh delivered. Bankable contracts, performance bonds available.

Independent technical due diligence for BESS asset acquisitions and financing. Scope: technology review, state-of-health assessment, grid contract analysis, revenue forecast validation, capex/opex benchmarking. Lender and equity mandates. >30 transactions completed.

Active asset management and trading optimization for BESS owners. Services: FCR/aFRR/mFRR portfolio management, energy arbitrage, intraday trading, forecasting and battery degradation minimization. Current AUM: 350 MW. Nordic and European markets covered.

Specialist grid integration and commissioning services for utility-scale BESS. Expertise: PCS tuning, grid code compliance testing, FCAS and FCR pre-qualification, EMS optimization. ISO-certified team with 15+ GWh commissioned. Available across Europe and UK.

Specialized consultancy for energy storage project development. Services: site identification, grid studies, revenue modelling, technology selection, procurement support and lender technical advisory. Served 40+ clients across Europe and MENA. Fixed fee or success-based engagement.

Comprehensive O&M services for BESS assets across Europe. 24/7 remote monitoring, preventive and corrective maintenance, cell replacement, BMS and EMS updates. SLA-backed response times. Currently managing 1.2 GWh of assets across 8 countries. Minimum 10 MW per contract.

Energie Haus GmbH is an independent BESS and transformer consulting company headquartered in Vienna, Austria. We provide vendor-neutral technical advice, manufacturer access, and end-to-end project support for developers, utilities, and industrial clients worldwide. Services offered: - BESS Consulting: feasibility studies, system sizing, technology selection, supplier due diligence, contract support and project management - Transformer Solutions: technical specification, supplier matching, IEC compliance validation, grid integration support - Independent EPC / IPS Contracting: full project delivery as single point of contact - O&M Advisory: operations and maintenance guidance for commissioned systems We work with a curated network of certified European manufacturers: ASTOR (Turkey/Global), BEZ (Slovakia, est. 1902), and IPS/EXERON (Bulgaria, EU-manufactured, NATO approved). No vendor lock-in — we recommend the solution that fits your project. Track record: 162+ MW installed capacity, 230,000+ transformers worldwide, active in 59 countries. Clients: renewable energy developers, grid infrastructure owners, EPC contractors, utilities, C&I operators.