Commercial roof
Application: membrane or metal roof with a clamp layout. Ask for module weight, frame holes, and the fire classification the authority having jurisdiction expects. RFQ unit: modules or pallets staged to the roof hatch limit.
Project questions to put in front of a solar panel supplier
A solar panel supplier reply is useful when it follows the application you actually have. GridWorks Supply translates rooftop, ground, carport, tracker, and community contexts into purchase fields. The desk is an independent sourcing partner. It does not stamp a structural calculation or a utility application.
- Specification: module rated power in W, efficiency with test basis, voltage in V, current in A and operating temperature in °C.
- Quantity: module count, pallet plan and separate project releases.
- Destination: US site, unloading conditions and mounting interface.
- Timing: requested release window, with supplier confirmation still open.
Five buying situations and the field each one adds
Ground row
Application: fixed-tilt or tracker. Interface question: module length versus the rail or torque tube already purchased. RFQ unit: a megawatt lot with a stated pallet plan.
Carport canopy
Application: parking canopy with drainage and vehicle clearance. Ask for dimensions, snow or wind papers the canopy vendor requires, and connector lead length. RFQ unit: modules per bay.
Community block
Application: one array serving several offtakers. Keep delivery lots separate even when the module model is shared. RFQ unit: modules per offtaker release.
PV beside storage
Application: modules feeding a storage block. Ask whether the design is AC-coupled or DC-coupled before you mix quotations. RFQ unit: modules plus a note that batteries are a separate line.
Comparison rules that survive the use case
Specification
Rated power, module efficiency, and maximum system voltage stay on the quoted model.
Quantity
Do not add a roof pallet count to a ground megawatt lot and call it one release.
Delivered scope
Freight to a downtown roof crane is a different scope from freight to a rural laydown yard.
Supplier documents
Datasheet, drawing, and listing, each tied to the model, travel with the price.
Two tradeoffs to write into the note
For the selected situation, request an exact-model datasheet, dimensional drawing, applicable listing and warranty. Agree a sample or incoming check with your qualified reviewer: compare labels, dimensions, connector markings and lot-linked records against the agreed revision, then record deviations and acceptance. Sample terms, MOQ, freight and preparation time require supplier confirmation. No sample result, model approval or installation suitability is asserted here.
Unit price versus delivered scope: a low module price can reduce acquisition cost when connectors, freight, duties, flash data, and warranty really match. A comparable delivered scope can expose a missing lead, a crane the roof cannot accept, or papers the inspector asked for. Publish neither side as a percentage.
Central or string conversion versus module-level conversion: a central or string path can cut equipment count on a large unshaded field. Module-level power electronics can support per-module operation where shade, rapid shutdown, or monitoring is already in the design. Maximum power voltage and string current still have to sit in the inverter MPPT window either way. DC-to-AC ratio is the engineer’s figure, not a default from this desk.
AC-coupled storage can fit a retrofit that keeps PV and batteries on separate controls. DC-coupled storage can reduce a conversion step when the new-build bus is actually shared. Enclosure rating and thermal notes for the storage gear are separate from the module frame. Open the module labels, the quote sequence, or the planner. The procurement brief restates the rating list.
Name the use, then ask for factory quotes
Roof, ground, canopy, community, or storage-adjacent: write one use per brief. Support terms in the header are FREE sourcing support with an up to 3% ceiling.
Discuss Project Requirements