Senai
Airport City

Senai Airport City (SAC) is a master-planned industrial and commercial township developed around Senai International Airport in Kulai, Johor. Spanning over 3,500 acres, it is the anchor development of the Johor-Singapore Special Economic Zone (JS-SEZ) — a landmark cross-border initiative that has accelerated infrastructure investment, workforce mobility, and multinational tenancy at a scale unseen in Malaysia since the 1990s.

The industrial precinct hosts a mix of aerospace MRO hangars, precision electronics assembly plants, high-throughput 3PL logistics hubs, and FMCG processing facilities. Factory footprints range from 3,000 m² SME units in the light industry clusters to flagship anchor tenants exceeding 80,000 m² under one roof. This diversity of factory sizes means solar systems range from 100 kWp starter systems for smaller tenants up to 1 MWp+ installations for large logistics warehouses operated by DHL, Schenker, and regional 3PL operators.

Energy Profile: What Drives Electricity Bills at SAC

Most factories at SAC are billed under TNB Tariff E1 or E2 (Medium Voltage, post-July 2025 Regulatory Period 4 rates). The maximum demand (MD) charge — currently RM 97.06 per kW per month — is often the single largest line item on a factory bill, especially for E&E manufacturers with production line startups creating sharp demand spikes. For a 500-kW MD reading, that alone is RM 48,530 per month before a single kWh of energy consumption is counted.

Solar PV systems do not directly reduce MD in the same way as BESS, but they consistently flatten the daytime consumption curve, reducing the number of months where peak kW demand hits its highest value. When paired with a Battery Energy Storage System (BESS), factories can actively cap their MD reading — a strategy increasingly adopted by E&E manufacturers in SAC whose German and Japanese parent companies mandate sub-5-year energy project paybacks.

GITA Eligibility for JS-SEZ Companies

The 60% Green Investment Tax Allowance (GITA) applies to all qualifying solar PV capital expenditure commissioned before 31 December 2026. JS-SEZ designation does not disqualify a company from GITA — in fact, companies with existing Pioneer Status or Investment Tax Allowance may stack GITA against different income streams. We prepare full MIDA Form GFP-H documentation and supporting energy audit packs for every SAC project.

For a 500 kWp system at approximately RM 1.5M capex, the 60% GITA delivers RM 900,000 in tax allowance — equivalent to saving 3 years of corporate tax liability on qualifying chargeable income, compressing effective post-tax payback from 3.5 years to under 2.2 years.

Starting Your SAC Solar Project

The fastest path to a bankable SAC solar proposal is our satellite roof analysis plus TNB bill model — typically completed in 5 working days. We combine 12 months of actual utility bill data with high-resolution roof mapping to produce an investment-grade yield report. If you are at feasibility stage, our online savings calculator gives an indicative output in under 2 minutes.

Trexon Energy holds full EPC (Engineering, Procurement, Construction) capability for all system sizes at SAC. Our factory solar solutions page covers the full installation process, from structural engineering and CAAM notification handling to Solar ATAP CAS application and SIRIM commissioning. For Johor-based procurement teams, our Johor Bahru office provides local project management throughout installation and warranty.