How a Tier-3 colocation operator in Cyberjaya used Huawei SUN2000 microgrid controllers, LUNA2000-215 grid-forming ESS, and FusionSolar PUE monitoring to fulfil RE100 commitments and attract hyperscale tenant PPA demand
tCO₂ offset annually
“We had two hyperscale cloud tenants tell us independently that their lease renewal in 2027 was conditional on our facility demonstrating a credible RE100 pathway. That is not a soft ask — it is a hard commercial requirement. The Trexon system delivered 35% renewable match in the first month of operation, and the FusionSolar PUE monitoring integration gave our ops team the data granularity we needed to reduce PUE from 1.42 to 1.34 in the same period. The carbon credit calculation methodology Trexon provided has been reviewed by our ESG auditor and confirmed as qualifying for Bursa carbon credit eligibility. None of our competitors in Cyberjaya have achieved PUE below 1.35 with a solar-plus-storage configuration. That is now a differentiator in our customer acquisition pitch.”
Cyberjaya's Multimedia Super Corridor designation brought a concentration of data center investment unlike anywhere else in Malaysia. By 2026, the precinct hosts Tier-2 through Tier-4 data centers operated by both Malaysian players and international hyperscale cloud providers, all drawing power from a shared TNB 132 kV grid infrastructure that is increasingly strained by the district's growing server loads.
For this Tier-3 colocation operator — a Malaysian company whose customer base includes two major Southeast Asian cloud providers, multiple financial institutions, and government-linked entity data workloads — the energy challenge is multidimensional. The facility operates 1.8 MW of continuous IT load, consuming approximately 2,600 MWh per month at the current PUE of 1.42. At TNB's C2 tariff rates, the monthly bill was consistently RM 600,000–650,000.
But the deeper challenge is not the bill. It is tenant retention.
Hyperscale cloud providers — including the two tenants who lease from this operator — have made public RE100 commitments requiring 100% renewable electricity sourcing across their entire leased infrastructure by 2030. For colocation tenants, this responsibility is delegated to the data center operator: the operator must either procure Renewable Energy Certificates (RECs), enter a Corporate Green Power Programme (CGPP) agreement with TNB, or — the most credible option for tenants with direct carbon reporting obligations — install on-site renewable generation with monitored, auditable output.
In late 2025, both hyperscale tenants indicated that lease renewals in 2027 would be conditional on the operator demonstrating a "credible RE100 pathway" — defined in their lease riders as demonstrating at least 30% renewable energy match by Q4 2026 with a documented plan to reach 60% by 2030.
Data centers present the most demanding load profile of any solar customer type. The IT load is continuous, non-interruptible, and broadly constant — servers do not ramp down at night or weekends. The cooling load (which accounts for the PUE premium above 1.0) varies with ambient temperature and server utilisation but maintains a significant base load at all times.
For this facility, Trexon's load analysis produced the following profile:
The solar system cannot meaningfully reduce IT load — that load is dictated by tenants' server utilisation. The opportunity is threefold: (1) generate renewable electricity on-site to offset a measurable fraction of total consumption, satisfying the RE100 renewable match requirement; (2) use the ESS to reduce Maximum Demand registration, reducing the MD charge component of the TNB bill; and (3) deploy the Huawei FusionSolar PUE monitoring integration to identify and eliminate cooling system inefficiencies, reducing the cooling load that drives the PUE gap above 1.0.
Solar Array: 2,590 × Trina Vertex N 580W Bifacial
2,590 units of Trina Solar Vertex N 580W bifacial N-type monocrystalline panels were installed across three rooftop zones: the main server hall rooftop (1,800 panels on the primary east-west double-shed roof), the UPS and electrical plant building roof (490 panels), and a purpose-built ground-level carport canopy over the facility's staff carpark (300 panels). Total DC capacity: 1,504 kWp (rounded to 1.5 MWp for planning purposes).
The Vertex N 580W N-type panels were specified for the data center context for three reasons. First, their high power density (580W in a 2.1 m² module) maximises yield from the facility's limited roof area relative to its large load. Second, N-type's superior low-light performance is relevant for data center rooftops in Cyberjaya's occasionally haze-affected irradiance environment — N-type cells generate more effectively under diffuse sky conditions compared with PERC alternatives. Third, the 30-year linear performance warranty with 0.4%/year maximum degradation rate provides the lowest lifetime levelised cost of energy (LCOE) of available alternatives — relevant for a customer whose energy procurement team modelled the system on a 25-year discounted cashflow basis.
Inverter System: 10 × Huawei SUN2000-150K-MG0
Ten Huawei SUN2000-150K-MG0 grid-forming microgrid controllers (150 kW each, total 1.5 MW AC) were installed in a dedicated inverter room on the facility's ground floor, cooled by an air-conditioned plant room to ensure rated performance in Cyberjaya's humid tropical climate. The SUN2000-150K-MG0's grid-forming capability provides two critical functions for the data center application:
First, it provides reactive power support (±0.95 power factor) to the facility's UPS systems, maintaining power quality within the tight voltage window (±2%, 49.5–50.5 Hz) required by the UPS topology to avoid unnecessary battery activation events.
Second, it supports a seamless islanding transition: in the event of a TNB grid disturbance, the SUN2000-150K-MG0 and LUNA2000 ESS can sustain island operation for critical support systems (cooling, monitoring, security) while the UPS batteries maintain the IT load — reducing the duration of UPS battery drain events and extending UPS battery lifetime.
ESS: 10 × LUNA2000-215 (2 MWh)
Ten LUNA2000-215 battery units (approximately 2,000 kWh total usable capacity) were installed in the facility's battery room — a purpose-built, air-conditioned, fire-suppressed room that meets the technical requirements of NFPA 855 (Standard for the Installation of Stationary Energy Storage Systems) adopted by the facility's insurance underwriters as the applicable standard for commercial battery installations.
The ESS operates on an MD-shaving schedule specifically calibrated for the data center's demand profile. The peak MD window for a data center is the early morning Monday production ramp-up (when batch processing jobs queued over the weekend are executed simultaneously) and the mid-afternoon weekday peak when financial transaction processing, e-commerce activity, and business application load coincides with the highest TNB demand window. The LUNA2000 discharges during these four daily windows, capping visible MD at 2,200 kW versus the unmanaged 2,750 kW peak — a 550 kW reduction contributing RM 16,500/month in MD savings at the C2 rate.
The technical centrepiece of this project — and the aspect most directly responsible for the PUE improvement from 1.42 to 1.34 — is the FusionSolar PUE Monitoring module integrated with the facility's existing Building Management System (BMS) and power distribution monitoring infrastructure.
Huawei's FusionSolar platform can ingest data from the facility's BMS (Schneider EcoStruxure in this case) via Modbus TCP, combining solar generation data with facility power consumption data to produce real-time and historical PUE calculations at 15-minute intervals. The ops team configured four alert thresholds:
The PUE monitoring identified two systematic inefficiencies within the first two weeks of operation: a chiller supply water temperature setpoint that was 1.5°C lower than necessary (a conservative setting from the facility's 2017 build that had never been reviewed), and a CRAC unit hot aisle containment bypass in Hall B that was allowing warm return air to short-circuit into the cold aisle. Both were corrected within 72 hours of identification — reducing cooling load by an estimated 85 kW and contributing the majority of the PUE improvement from 1.42 to 1.34.
With the 1.5 MWp system generating approximately 174,000 kWh/month against a facility consumption of 1,840,000 kWh/month, the renewable energy match rate is 9.4% on a pure generation basis. However, under the RE100 Technical Criteria (2023), operators may claim Scope 2 renewable electricity sourcing credit using one of three methodologies: market-based (using RECs or CGPP certificates), location-based, or, for on-site generation, a combination of direct consumption tracking and REC issuance for net metering exports.
Trexon's ESG advisory team prepared a RE100 compliance methodology documentation package for the operator's sustainability auditor, combining: - Direct on-site generation consumption (174,000 kWh/month × 12 = 2,088,000 kWh/year) - Renewable Energy Certificates issued under Malaysia's I-REC Standard for the net metered export portion - Scope 2 market-based emissions calculation using the I-REC-adjusted grid factor
Under this methodology, the facility achieves a 35% renewable match — exceeding the tenants' Q4 2026 threshold of 30% — with a documented pathway to reach 60% under the planned Phase 2 (additional 1.5 MWp on adjacent land plus CGPP agreement for the balance).
The Bursa Malaysia carbon credit eligibility assessment, commissioned by the operator's sustainability team, confirmed that the 2,075 tCO₂ annual displacement qualifies for voluntary carbon market crediting under the Bursa Carbon Exchange (BCX) methodology for renewable energy projects, subject to the standard third-party verification audit. The operator has engaged a Bursa-accredited verifier for the FY2026 submission.
Generation performance: Average monthly generation: 173,500 kWh — a specific yield of 1,388 kWh/kWp/year, consistent with the P50 design estimate for Cyberjaya's irradiance profile.
Savings breakdown (three-month average): Total monthly TNB bill reduction: RM 62,500: - Energy consumption savings: RM 46,000/month (173,500 kWh × RM 0.265/kWh blended C2 consumption rate) - MD charge reduction: RM 16,500/month (MD reduced from 2,720 kW to 2,200 kW average, 520 kW reduction at RM 30/kW + applicable power factor adjustment savings)
Projected annual savings: RM 750,000. System installed cost: approximately RM 4.35 million. Simple payback: 5.8 years. At a 6% discount rate, 25-year NPV: approximately RM 8.2 million positive.
PUE improvement value: The PUE reduction from 1.42 to 1.34 represents an 85 kW reduction in cooling load. At the facility's consumption rate, this cooling efficiency improvement saves an additional 61,200 kWh/month — approximately RM 16,200/month in additional electricity savings not attributed to solar generation directly but enabled by the FusionSolar monitoring integration. This figure is not included in the RM 750k/year headline savings; it represents incremental value from the operational optimisation component of the project.
Tenant relationship outcome: Both hyperscale tenants confirmed at their October 2026 lease review meetings that the RE100 pathway documentation satisfied their sustainability lease rider requirements. Lease renewals for 2027–2032 were executed by November 2026.
Note: Financial figures represent indicative modelling based on Trexon installation data, TNB C2 tariff schedules, and RE100 methodology calculations. Client details are anonymised per enterprise confidentiality agreements.
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