Solar O&M Contract: What to Define Before You Sign
Response versus resolution time, how availability is counted, who owns the spares and the data, and the handover clause most contracts leave out entirely.
Commercial & Industrial Solar
Planning and procurement notes for C&I solar projects — sizing, storage, payback modelling, commissioning and operations, written for installers and EPCs.
How to Calculate LCOE for Commercial Solar + Storage
Which inputs belong in a commercial solar LCOE calculation, which get left out, and why a figure without a stated discount rate cannot be compared.
Commercial Roof Solar: Roof Life and Warranty
Check roof life, waterproofing and roof warranty before a commercial array goes on. What to confirm in writing, and what usually voids coverage.
Solar Mounting Load Calculation
Procurement guide7 min readGTP Solar The number that governs your racking is almost never the regional wind speed. It is
Solar Plant Operations and Maintenance
Procurement guide6 min readGTP Solar Operations and maintenance is usually specified after handover, which is the wrong end of the
Solar Inverter Sizing Guide
Procurement guide6 min readGTP Solar Inverter sizing looks like a simple division – array kilowatts divided by something – and
Solar Mounting Structures: How to Specify the Right System
How to choose a solar mounting system: roof type and attachment, ballast vs penetration, ground foundations, ASCE 7 loads, coating class, tilt and spacing.
Battery Storage Fire Safety and Code Compliance: The Submittal Checklist
What a US battery storage submittal needs: UL 9540 and UL 9540A, NFPA 855 separation, siting rules, detection and suppression, and where review fails.
LV Switchgear: How to Specify a Board That Passes Inspection
How to specify LV switchgear: rated current, short-circuit rating, form of separation, protection discrimination, IP rating and IEC 61439 type testing.
Distribution Transformers: How to Specify One Correctly
How to read a transformer nameplate: rating, vector group, impedance, losses, cooling and the IEC vs ANSI choice that decides the test report.