Technical Solutions Senior Manager, Rooftop (Renewable Energy - Solar PV & Battery Storage) – HQ Based

ERS Energy Sdn Bhd; Kampung Malaysia Tambahan; On-site; MYR 180,000 - 240,000; Full time

Job summary

Sierra Solar, a subsidiary of ERS Energy Group, is seeking a Technical Solutions Senior Manager for rooftop solar and battery storage. Based in Kuala Lumpur with regional site travel, you will be the technical authority, resolving complex on-site issues and advising sales, design and project teams on optimal solutions.

You will lead power quality investigations, coordinate with OEMs, review designs, support commissioning, and build technical standards.

Qualifications

• 8–10 years of solar PV experience with commissioning and troubleshooting.
• Experience with factory/industrial electrical systems incl. power factor and max demand.
• Familiarity with Malaysian regulatory/grid requirements preferred.
• Ability to work on rooftops and in the field with safety emphasis.
• Willing to travel within Malaysia, occasional regional travel.

Responsibilities

• Diagnose and resolve on-site issues for rooftop solar and hybrid systems.
• Lead power quality studies and advise on fixes (APFC, harmonic filters, etc.).
• Assess interactions between inverters and factory equipment.
• Lead root-cause analysis and provide permanent fixes.
• Act as main technical contact for OEMs and suppliers; manage RMA.
• Review designs and single-line diagrams with design team.
• Support pre-sales with technical input and site assessments.
• Support commissioning and grid interconnection requirements.
• Develop technical standards, checklists and lessons learned.
• Train site teams and contractors on installation quality.

Skills

Rooftop solar systems

Power factor

Power quality analysis

Troubleshooting

On-site field work

Vendor liaison

System design review

Education

Electrical Engineering degree

Diploma holders considered

Tools

Inverters

BESS / Hybrid systems

PV modules

EMS/SCADA

Electrical testing equipment

Job description

Position: Technical Solutions Senior Manager, Rooftop Solar & Battery Storage

Company: Sierra Solar (a subsidiary of ERS Energy Group)

Location: Taman Desa, Kuala Lumpur, with regional site travel

1) Role Purpose

• You will be the go-to technical authority for our rooftop solar and solar-plus-storage portfolio.
• You will resolve technical issues on site, work directly with equipment manufacturers, and advise our sales, design and project teams on the best solution for complex systems.
• You will also be the person who understands how a solar system behaves inside a working factory’s electrical network, including power factor, power quality and demand impacts after installation.

2) Key responsibilities

• Diagnose and resolve technical issues on site across commissioned and in-progress rooftop solar and hybrid solar-plus-battery systems (inverters, DC and AC protection, monitoring, communications, earthing, and so on).
• Investigate and resolve power factor, power quality and demand issues in factories after solar PV installation. This includes analysing load profiles and utility bills, identifying why power factor has dropped or penalties have appeared, and recommending fixes such as inverter reactive power settings, capacitor banks or automatic power factor correction (APFC), harmonic filters, or static var generators.
• Assess the interaction between solar inverters and existing factory equipment (motors, VSDs, capacitor banks, generators), including harmonics, voltage fluctuation, and reverse power or export issues.
• Carry out power quality measurements and studies on site, and explain the findings and corrective actions clearly to clients.
• Lead root-cause analysis on performance and fault issues, and recommend permanent fixes rather than temporary workarounds.
• Act as our main technical contact for manufacturers and suppliers (inverters, batteries, PV modules, mounting systems, EMS). This includes escalating issues, managing warranty and RMA claims, and following up until they are resolved.
• Evaluate and select the right technical solution for complex projects, including hybrid systems, large C&I rooftops, and sites with unusual load, grid or structural constraints.
• Review system designs, single-line diagrams and equipment specifications with our design team to make sure they are practical to build, safe and compliant, and that factory power factor and power quality impacts are considered at design stage.
• Support pre-sales with technical input on proposals, client meetings and site assessments.
• Support commissioning, testing and handover, including grid interconnection requirements with TNB and other relevant authorities.
• Build and maintain technical standards, checklists and lessons-learned documentation so issues do not repeat across projects.
• Train and guide site teams and contractors on installation quality and troubleshooting.

3) Requirements

• Degree in Electrical, Electronic, Mechanical or related engineering. Diploma holders with strong hands-on experience will also be considered.
• At least 8 to 10 years of experience in solar PV, with hands-on exposure to commissioning and troubleshooting. Experience with BESS or hybrid systems is a strong advantage.
• Proven experience with factory or industrial electrical systems, including power factor correction, power quality analysis and the effect of solar PV on a site’s power factor and maximum demand.
• Solid understanding of inverter technology (including reactive power control), string and system design, protection and earthing, and PV monitoring.
• Familiarity with Malaysian regulatory and grid requirements (Energy Commission, TNB tariffs and power factor charges, and relevant schemes) is preferred.
• Proven ability to work with OEMs and suppliers and to resolve issues through them.
• Comfortable working on rooftops and in the field, with a strong commitment to safety.
• Clear communicator who can explain technical issues to clients, management and site teams.
• Professional registration or competency certification (e.g. Competent Person, Chargeman, or PEng/Ir) is an advantage.
• Willing to travel within Malaysia, and occasionally regionally.

4) Nice to Have

• Experience with C&I rooftop projects, including structural and roof considerations.
• Experience using power quality analysers and interpreting the data.
• Experience with EMS/SCADA integration or battery system sizing.
• Experience working with international suppliers (e.g. Chinese or European OEMs).

5) What We Offer

• A senior technical role with real influence on how we design and deliver systems.
• Exposure to a fast-growing solar and BESS portfolio backed by a major Malaysian infrastructure group.
• Opportunities to grow with a regional energy business.