Keep the solar tools. Add one control spine between them.
The best stack is not the one with the most software. It is the one where every lead, design, promise, invoice, and result has one owner—and every handoff can fail visibly.
Best-fit verdict
Do not replace the current stack. First prove the qualified-enquiry → OpenSolar-project handoff. Keep a manual review gate until its field coverage, failure rate, and per-project cost are known.
Current reading
UNREAD — the tools are named, but field ownership, enabled integrations, duplicate entry, failure alerts, and New Zealand API costs are not yet mapped.
OpenSolar designs, Quotient presents, Xero accounts, and Stackmates qualifies and learns. Integration earns its place one measured handoff at a time.