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Aurea Energy has engineered a utility-scale 1MW / 2MWh Hybrid Energy Storage System for a commercial client in Bulgaria. This system integrates a 1,008kWp solar PV array with a 2,007kWh LFP battery energy storage system through 2 × MEG 500K hybrid inverters, delivering a complete behind-the-meter solution for peak shaving, self-consumption, and grid support.
The system operates on a hybrid architecture with a DC/AC ratio of 1.1, maximising equipment utilisation. The PV array feeds power through 2 × 500KW inverters while the 2MWh battery system stores excess solar generation for discharge during peak tariff periods. With an estimated annual generation of 1,943MWh and a payback period of less than 4 years, this installation delivers both energy independence and compelling financial returns for Bulgarian commercial energy users.
| Item | Model / Spec | Qty | Remark |
|---|---|---|---|
| PV Panel | 720W N-Type Bifacial | 1,400 pcs | 14 pcs/string · 100 strings · 1,008kWp |
| PV Combiner Box | 5 inputs / 1 output | 20 pcs | |
| Hybrid Inverter | MEG 500K · 500KW · 400V 3-Phase | 2 pcs | Max 12 MPPT · 24 strings · Parallel-ready up to 2MW |
| Lithium Battery | 716.8V 280AH · 200.7kWh per cluster | 10 clusters | 14 × 51.2V 280AH per cluster · 2,007kWh total |
| High Voltage Box | BMS · 1500V 100A | 10 pcs | One per cluster |
| Battery Combiner Cabinet | Third-level BMS · 5 in / 1 out | 2 pcs | |
| PV Cable | PV1-F 1×6mm² | 10,000 m | |
| MC4 Connector | 1000V 30A | 700 pcs | |
| Mounting System | Roof / Ground mount | 1 set | For 1,400 panels |
| ATS (Optional) | 1000A | 1 pc | For diesel generator integration |
The 720W N-Type bifacial modules feature SMBB technology for improved light trapping and current collection. With Hot 2.0 technology for superior LID/LETID resistance and bifacial gain of 5–25%, these tier-1 panels deliver significantly lower LCOE. Certified to withstand 2,400 Pa wind load and 5,400 Pa snow load.
The MEG 500K is a modular-design hybrid inverter with independent DC/DC and DC/AC modules for easy maintenance. Each unit supports 500KW rated power (550KW max), 12 MPPT channels across 24 strings, and parallel connection of up to 4 units for 2MW total capacity. Integrated PV/MPPT/transformer/STS with 100% unbalanced load support and flexible control strategy configuration.
The 2,007kWh LFP battery system consists of 10 clusters, each containing 14 × 51.2V 280AH modules in a 716.8V configuration with self-designed BMS. Key features include:
The system includes a comprehensive monitoring platform with a local webserver for easy configuration and a multi-function data logger. The logger collects operational data from all units via Modbus RS485 and communicates with the cloud server via internet — enabling remote monitoring, fault alerts, and performance analytics.
With an estimated 1,943MWh of annual generation and a payback period of less than 4 years, this 1MW / 2MWh hybrid system delivers compelling financial and operational benefits for Bulgarian commercial energy users. The 2MWh battery can support maximum loads of 1,000KW for up to 2 hours during grid outages.
| Year | Gross Capacity (MWh) | Degradation | AC Output Efficiency | AC Output Capacity (MWh) |
|---|---|---|---|---|
| Year 0 | 2.08 | 98.40% | 85.06% | 1.77 |
| Year 1 | 2.08 | 92.01% | 83.05% | 1.72 |
| Year 2 | 2.08 | 88.03% | 82.26% | 1.71 |
| Year 3 | 2.08 | 85.32% | 81.57% | 1.69 |
| Year 4 | 2.08 | 84.06% | 80.95% | 1.68 |
| Year 5 | 2.08 | 82.75% | 80.35% | 1.67 |
| Year 6 | 2.08 | 81.57% | 79.78% | 1.66 |
| Year 7 | 2.08 | 80.35% | 79.22% | 1.64 |
| Year 8 | 2.08 | 79.13% | 78.66% | 1.63 |
| Year 9 | 2.08 | 77.91% | 78.12% | 1.62 |
| Year 10 | 2.08 | 76.69% | 77.57% | 1.61 |
Whether you're evaluating a single commercial installation or planning a multi-site rollout across Bulgaria, send us your enquiry and we'll respond within one business day with a tailored proposal. Ask about volume discounts and our local installation partner network in Southeast Europe.
