Sahawatthanakit (1988) Co., Ltd.
SAHAWATTHANAKIT(1988) · Make It Smart
INSIGHTS

Insights & Industry Knowledge

Articles, news, and technical insights on construction materials, pallet racking, lubricants, and Thai industrial standards — sourced and cited from trusted references.

Comparison of factory rooftop solar investment models CAPEX, PPA and Leasing

Factory Rooftop Solar: CAPEX vs PPA vs Leasing — Which Investment Model Wins

A decision-ready comparison of the three rooftop-solar investment models for Thai factories: CAPEX (own it outright, one-time payment, 4–6 year payback, claim BOI + depreciation), PPA (developer funds it free, you buy the power at 20–40% below grid for 10–25 years, zero capex), and Leasing (fixed monthly payment, you keep all the power). Includes a side-by-side comparison table, a 10-year cash-flow example for a 100 kWp system, 5 deciding factors (budget/tax/roof ownership/risk/time horizon), and the 6 PPA contract clauses to read before signing (escalation, buyout, REC/carbon credits, performance, building-sale transfer) per ERC/BOI/MEA and TFRS 16.

solarppacapex
Read more
Assessing factory roof structure before rooftop solar panel installation

Can Your Factory Roof Take Solar? — Structural Load, the 20 kg/m² Rule, and Wind Uplift (มยผ. 1311) Before Installing PV

How to assess a factory roof before installing rooftop solar in Thailand: the dead load a PV system adds (panel + rails + ballast), the 20 kg/m² legal threshold (2023 ministerial regulation exempting it from a building-modification permit), the real weak point of metal-sheet roofs (purlins + fixings) vs concrete decks, wind uplift per มยผ. 1311-50 / AS-NZS 1170, and the checklist a licensed civil engineer must sign off.

solarrooftopstructural-load
Read more
Comparison of string inverter, central inverter, microinverter and power optimizer on a factory solar roof

String vs Central vs Micro Inverter + Power Optimizer — Choosing Solar Inverter Architecture

Comparing four solar inverter architectures for Thai factory roofs and commercial buildings: string inverter, central inverter, microinverter and power optimizer (DC optimizer) — covering MPPT granularity, shading/mismatch tolerance, panel-level monitoring, rapid-shutdown safety, cost per watt, maintenance, standards IEC 62109 / IEC 62116 anti-islanding, and how to match the architecture to the job.

solarinvertermicroinverter
Read more
Solar carport structure with PV panel roof for commercial buildings and factories in Thailand

Solar Carport Structure Design — Wind Load Engineering per Thai DPT / AS/NZS 1170

A design guide for solar carport structures for Thai factories and commercial buildings — focused on wind uplift as the critical load, standards มยผ. 1311 (DPT) / AS/NZS 1170.2 / ASCE 7, balancing tilt angle against wind, vehicle clearance + EV charger, hot-dip galvanized steel for corrosion, foundations that resist overturning, and the building permit (Aor.1) + licensed-engineer sign-off requirement.

solarcarportwind-load
Read more
Inspecting solar panel degradation with EL imaging and IV curve for a Thai factory

PV Module Degradation — PID/LID Mechanisms, EL Imaging Measurement, and Warranty Claims in Thailand

A deep look at the degradation mechanisms that push solar panels past spec, especially in Thai conditions (heat + humidity + high voltage): LID, PID, LeTID, thermal cycling, microcrack/hotspot — with how to prove real degradation using IV curve flash test, EL (electroluminescence) imaging, IR thermography and Performance Ratio monitoring, PID prevention, and the evidence needed to claim warranty per IEC 61215 / IEC TS 62804.

solarpv-degradationpid
Read more

Industrial Insights Weekly

Every Sunday: 1 new technical article + 1 case study + quick tips. No spam, unsubscribe anytime.