Priya Natarajan
Associate, Project Director
Published
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3 min read
Topic
Sustainability
A large, flat warehouse roof is the best solar site most companies own. That is why so many net-zero conversations start — and stop — with panels. In our experience the array is the simplest part of the job. Whether a distribution centre actually reaches net zero is decided by a handful of quieter decisions about how the building is used.
These are the five lessons we keep coming back to after four net-zero logistics projects in Québec and Ontario.
1. Start with the operation, not the panels
Energy follows activity. Before we size anything, we map the operation: shift patterns, dock cycles, charging schedules for forklifts and yard tractors, refrigeration loads. On one project, simply moving battery charging from the afternoon peak to the night shift cut the required array by a fifth.
2. Treat the envelope as equipment
An airtight, well-insulated shell is the cheapest kilowatt you will ever buy. We specify and test airtightness the way we would commission a chiller: with a target in the contract, a blower-door test before handover and a named person responsible for the result.
“The array gets the photograph. The dock seals get the savings.”
3. Design the docks for the cold
Loading docks are the largest openings in the building, and they stay open for most of the day. Insulated dock shelters, fast-acting doors and a vestibule between the cold zone and the dock area typically save more energy than an extra row of panels.
Fig. 02 — Clear-span hall before fit-out: skylights replace most daytime lighting
4. Measure it after a year
Models are optimistic. Twelve months after handover we return to compare metered energy with the design model, line by line. The gaps are rarely dramatic — a ventilation schedule left on, a charging bay used more than planned — but fixing them is what turns “designed to be net zero” into “operating at net zero”.
5. Write the budget for the whole life
Most of the decisions above cost a little more on day one and pay back within the lease. We present them in the cost plan as a lifetime number, next to the capital cost, so the conversation is about the building the client will operate — not only the one they will buy.
None of this is exotic. It is a matter of asking the operational questions early, writing the targets into the brief and staying on after the keys change hands.
