®GUIDE REPORT
How to run a multi-vendor RFQ, end to end
9 min read · sample
One bill of materials, comparable quotes, landed cost and lead time apples to apples.
Sample topic
Sunhub resources
Guides & whitepapers
Long-form, technical guides on procurement, design and project finance for the solar trade.
Explore sample topics
6 of 6A preview of topics for this library. Downloadable resources will appear here as they become available.
GUIDE REPORT
Reading a module spec sheet
7 min read · sample
Power tolerance, temperature coefficients and degradation curves that actually matter.
Sample topic
GUIDE REPORT
ITC, IRA and domestic content
11 min read · sample
Federal incentives that move a deal, adders, eligibility and the paperwork.
Sample topic
GUIDE REPORT
Battery sizing for C&I
8 min read · sample
Right-size storage to load profile and tariff without overpaying for unused kWh.
Sample topic
More guides
GUIDE REPORT
Freight that does not eat your margin
6 min read · sample
Liftgate, accessorials and container math, the logistics that quietly decide a deal.
Sample topic
GUIDE REPORT
Net-30 terms, the buyer's playbook
7 min read · sample
How to qualify, what suppliers actually check, and how to scale a credit line.
Sample topic
About this library
Browse by topic
Buyer's Guides
Practical sourcing guidance on comparing suppliers, reading a spec sheet and structuring a multi-vendor RFQ.
Compliance & Code
UFLPA traceability, FEOC screening and NEC 2023 requirements explained for equipment selection, not just legal reference.
Financing Playbooks
Net terms, project finance and tax credit transferability mechanics, covered for how they actually apply to a deal.
Installation Whitepapers
Technical installation guidance, from string design to structural attachment, at the depth a design review actually needs.
Annual Industry Outlook
A yearly look at demand, pricing and policy direction for the year ahead, flagged clearly where figures are projections.
Sustainability Reports
ESG and circular-economy topics, including module recycling and supply chain traceability, covered for procurement relevance.
Built to actually get used
Long enough to be useful, not padded
Guides run to whatever length the topic actually needs, not stretched to hit a word count, since a buyer using this to make a real decision doesn't need filler.
Frequently asked
Are guides written for a technical or general audience?
Guides are written for solar trade professionals, so they assume working familiarity with procurement, system design, and project finance rather than explaining the basics. The depth is aimed at installers, distributors, EPCs, and similar readers who need technical detail they can act on, not general-audience overviews.
How long is a typical guide?
Guides are long-form and run as long as the topic genuinely requires, which for a technical procurement, design, or finance subject often means many pages. The goal is to be thorough enough to be useful without padding, so length follows the material rather than a fixed word count.
Are guides updated when the underlying policy or code changes?
Guides covering compliance, code, or policy are maintained so they reflect current requirements, since outdated guidance is worse than none in those areas. When the underlying rule, tariff, or code edition changes, the affected guide is intended to be revised, though you should always confirm specifics against the current regulation or your AHJ before relying on them.
Installation Whitepapers
Technical installation guidance, from string design to structural attachment, at the depth a design review actually needs.
String design against real code limits
Maximum string voltage, temperature derating and NEC 690.7 requirements covered at the depth a design review actually checks, not a simplified rule of thumb.
Structural attachment by roof and mounting type
Attachment approach for shingle, tile, metal and ground-mount systems, covered with the load and spacing considerations a structural review looks for.
Equipment handling that protects warranty
Transport and on-site handling guidance that keeps micro-cracking and connector damage from voiding a manufacturer warranty before a system even goes live.
Installers and their design teams
Guidance targets crews and designers who need code-level detail, not a general overview of how solar installation works.
Compliance & Code
UFLPA traceability, FEOC screening and NEC 2023 requirements explained for equipment selection.
UFLPA traceability, explained practically
Forced-labor prevention enforcement now reviews thousands of shipments a year, and this guide covers what full traceability to polysilicon origin actually requires to survive a review, not just the legal standard.
FEOC and material assistance thresholds
Prohibited foreign entity rules apply on a rising cost-ratio threshold schedule, and this guide walks through what that means for sourcing decisions made today versus a project starting construction next year.
NEC 2023 requirements that affect equipment choice
Rapid shutdown under 690.12 and arc-fault protection under 690.11 drive specific equipment decisions, covered here at the level a design review actually needs.
Compliance status affects financing and resale, not just legality
Clean documentation on FEOC and UFLPA status increasingly affects tax credit eligibility and project financing, beyond the baseline legal requirement to comply.
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