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Bario

Current status, energy mix, organizations, suppliers, equipment, controls, reported specifications, and project updates—with source-level citations.

CoverageDetailed public record
Named organizations3
System facts20
Sources reviewed6
Evidence reviewed2026-07-20

The Bario Central Solar Hybrid Power System supplies the remote Bario Highlands with an off-grid combination of PV, battery storage, and diesel backup. Sarawak Energy records construction beginning in 2010, initial commissioning in September 2015, transfer to its operation in June 2016, and an October 2016 official launch. The launch-era rating was 887 kW and at least 70% of generated energy was expected from solar. Vendor documents preserve design changes around 885.84-906 kWp of PV, 3,860 kWh of battery storage, and varying inverter/diesel totals. Sarawak's current Rural Electrification Masterplan describes a 998 kW station serving more than 400 households and proposes a future 33 kV grid interconnection.

Research status
Operating as an off-grid solar-battery-diesel station under Sarawak Energy in the current Rural Electrification Masterplan reviewed in July 2026. The plan proposes interconnecting Bario to the state grid via an approximately 60 km Ba'kelalan-Bario line and 33 kV substation by 2030; that connection is not yet documented as complete.
Historical classification
Community
Reported capacity
3 MW
Coordinates
3.74077, 115.46613
Evidence note: “Every company” cannot be proven from public material alone. This page lists every organization found in the recovered record and reviewed sources, preserves unknown roles, and explicitly marks undisclosed controller or equipment details.
Report missing evidenceResearch methodology

Project delivery

Who was involved in Bario?

3 publicly identified organizations. Where a recovered source named a participant without explaining its work, the role remains explicitly unspecified.

Organization

Leonics

Supplier/documenter of the PV, bidirectional inverter, MPPT, and hybrid-control architecture for the Bario system. [3][4]

Organization

Ministry of Rural and Regional Development (KKLW)

Federal project funder/client; the reported project allocation was RM27 million and KKLW appointed Sarawak Energy for operation and maintenance. [2]

Organization

Sarawak Energy Berhad

Operator and maintenance authority since the June 2016 handover; its Rural Off-Grid Operation Division employed local operators for the station. [2][5]

System evidence

Energy mix, capacity, and specifications

Values can describe different project phases, generation sources, storage systems, or other components. Source citations are attached to each figure so discrepancies remain visible.

KW Solar
906 [1]
KW Gas/Diesel
1443 [1]
Storage
3860 kWh [1]
Commissioned plant rating (2016 owner account)
887 kW solar-hybrid system [2]
Current masterplan station rating
998 kW Bario Central Solar Hybrid Station with three diesel generators [5]
Vendor PV configuration
885.84 kWp detailed design: 402 kWp AC-coupled plus 483.84 kWp DC-coupled; a later Leonics project table gives 906 kWp, indicating a phase/design revision [3][4]
Vendor battery rating
3,860 kWh at 480 VDC [3][4]
Vendor inverter rating
1,200 kW in an early project summary; 1,100 kW in a later Leonics table [3][4]
Vendor diesel rating
886 kVA in an early project summary; 1,443 kVA in a later Leonics table. An early diagram separately labels 275, 275, 158, and 450 kVA units, consistent with a revised or staged fleet. [3][4]
Launch-era energy mix
At least 70% solar, with the balance supplied by diesel and battery storage used for balancing/time shifting [2]
Customers
More than 200 households in nine villages plus the bazaar and government facilities at launch; current masterplan says more than 400 households [2][5]

Controls and hardware

Equipment and controller details

Manufacturer and model are shown only when a source names them. Generic descriptions are not converted into guessed product assignments.

01

PV grid inverters

Leonics

Early design diagrams show four 125 kW AC-coupled grid-inverter blocks; the slide's printed aggregate contains an arithmetic inconsistency, so the component count and ratings are retained without adopting its total. [3]

02

Bidirectional battery inverters

Leonics

Three 200 kW bidirectional units (600 kW total) connected to the 480 VDC, 3,860 kWh battery bank. [3]

03

MPPT charge controllers

Leonics

Eight 70 kW MPPT blocks are depicted for the 483.84 kWp DC-coupled PV section. One text extraction renders the multiplier incorrectly; eight units are consistent with the displayed 560 kW total. [3]

04

Hybrid controller

Leonics

Hybrid control and communications coordinate AC-coupled PV, DC-coupled PV/battery, and diesel generation. [3][4]

Technical record

Architecture, performance, and project updates

Concise technical facts, milestones, operating results, and later developments. Dated notes distinguish historical design claims from current evidence.

  • Operating architecture

    Published engineering analysis describes a mixed-bus system: PV and batteries feed a DC bus through converters while diesel generators feed the AC bus. In the modeled load-following logic, PV serves load and charges storage; the battery discharges to its minimum state of charge before diesel is dispatched. [6][3]

  • Milestones

    Construction began in 2010, first commissioning occurred in September 2015, Sarawak Energy accepted operation in June 2016, and the official launch was held on 25 October 2016. [2]

  • Expansion context

    The central plant initially covered nine villages. Two extension villages were expected to lift the central-plant reach above 300 homes, while five other small nearby settlements were assigned separate stand-alone hybrid systems and should not be counted as central-plant capacity. [2]

  • Future grid connection

    Sarawak's Rural Electrification Masterplan proposes a 33 kV substation and roughly 60 km covered-conductor link from Ba'kelalan, interconnecting rather than simply replacing the hybrid station under the 2030 plan. [5]

  • Rating provenance

    The 887 kW launch rating, 885.84/906 kWp vendor PV values, and 998 kW current masterplan value belong to different dated descriptions. They are retained separately rather than normalized into a single undocumented capacity. [2][3][4][5]

Provenance

6 sources

Primary owner, government, university, supplier, and engineering sources are preferred. Archived references preserve claims whose original pages moved or disappeared.

  1. [1]
    Recovered Microgrid Projects record

    Internet Archive · Archived source · captured 2021-04-20

  2. [2]
  3. [3]
    MW Scale Stand-Alone PV-DG Hybrid Systems

    Leonics / HOMER Energy · Primary source

  4. [4]
    Inverter Technologies in Isolated Microgrid

    Leonics / Asian Development Bank Asia Clean Energy Forum · Primary source

  5. [5]
    Sarawak Rural Electrification Masterplan 2030

    Government of Sarawak, Ministry of Utility and Telecommunication · Primary source

  6. [6]
    Operational Strategy and Performance Analysis of the Bario Solar Hybrid System

    International Journal of Integrated Engineering, Universiti Tun Hussein Onn Malaysia · Primary source

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