Capacity Limit
- 10kWac for Single Phase
- 30kWac for 3 Phase (Systems with a capacity above 30kWac require a power system study)
Subject to quota availability (Not more than 75% of the total maximum transformer loading in the area from 11hrs to 1500hrs.
Applicants shall install the solar PV system with the capacity that generates energy not exceeding 75% of the average consumption for the past 3 months.
For systems exceeding 30kWac, a power system study is mandatory. For systems above 50kWac, the applicant shall seek consultation and undertake negotiations with Sarawak Energy’s Single Buyer.

2. Types if Installation Allowed:
PV modules can only be installed at the following locations:

• On the rooftop of building, and
• On the garage, car park, and similar structures

For types of installation other than mentioned, the applicant shall seek approval from the Director of Electricity Supply, Sarawak.

3. Connection
PV Systems shall be connected to Sarawak Energy Distribution Network in accordance with the following requirements:

- Voltage:
Single Phase 240V (+5% and -10%)
3 Phase 415V (+5% -10%))

- Voltage Fluctuation: The maximum voltage fluctuation range allowed due to varying solar radiation is 6%. Beyond this, the utility and consumer equipment will be at risk of overheating.

- Power Factor: PV Systems shall have a leading or lagging power factor greater than 0.9 and 0.85 respectively when the output is greater than 20% of the rated output power.

4. LV Penetration Level for Multiple Installations:
Multiple installations of PV in a same LV network will increase the current injection to the respective network. Undesirable overvoltage in the LV networks might occur if the magnitude of PV current injection is greater than the load of the LV networks.

Recommendation for PV penetration limits are as follows:

• Maximum allowable Solar PV capacity connected to a single LV feeder is 25kW. This is to ensure that, under worst case scenario without load, the voltage limit of 240V (+5% and -10%) will not be violated.
• Maximum allowable solar capacity connected to LV feeder pillars is 75% of the local transformer loading.

5. Interconnection Method

• The Interconnection to Sarawak Energy Distribution Grid System shall be done through Direct Connection. Figure 1 shows the diagram of direct connection between the Prosumer’s Solar PV system and the Grid System.
• The Connection shall be made in accordance with MS IEC 1837 and its updated versions.

Figure 1: The Direct Feed NEM Approach

6. Metering Scheme

• A meter shall be installed to measure the energy export of the PV system to Sarawak Energy system. This shall be achieved via a dedicated energy meter (PV Meter) installed at the output of the PV system.
• PV Meter shall be installed as near as possible to Sarawak Energy Meter with maximum distance of 1 meter apart and properly labelled as “PV METER”.
• PV Meter connection to the Grid System shall be done via the existing meter cut-out and neutral link. This point shall be identified as the Common Connection Point (CCP).
• The customer shall be responsible for any installations after the meter.
• The Contractor shall provide and install all the materials required for the system interconnection works.
• All live connection and meter installation works shall be carried out by the authorised Sarawak Energy personnel only.
• For looping connection between cut-outs, 16mm2 Cu or 25mm2 Al cable should be used if the meter is installed in separate cabinets (with maximum distance of 1 meter).
• Single phase smart meter shall be installed for application up to 12kWp
• 3-phase smart meter shall be installed for application more than 12kWp but less than or equal to 20kWp
• Existing Sarawak Energy normal meter shall be replaced by the smart meter
• The connection of PV Meter is shown in Figure 2

Figure 2: Connection Diagram for PV Meter and the Consumption (Sarawak Energy) Meter