GuaranteeCheck
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SunStrong Management Sunrun Renewbrook
Pricing FAQ
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Servicers
SunStrong Management Sunrun Renewbrook Pricing FAQ Check for free
Renewbrook

Renewbrook took over your PosiGen lease. Your guarantee came with it.

Renewbrook acquired PosiGen's orphaned solar portfolio in February 2026. Your lease's production guarantee didn't disappear in that handoff — it transferred along with everything else. GuaranteeCheck checks your real output against it, for free.

What we know about Renewbrook

New servicer, lower-confidence guidance — flagged honestly.

Worth knowing: Renewbrook doesn't publish a dedicated claims process, and — unlike SunStrong or Sunrun — it doesn't yet have an established Better Business Bureau complaint track record to point to as a reliable escalation path. Renewbrook is newer as a servicer (the PosiGen portfolio moved to them in February 2026), so this should read as "not enough data yet," not "the process works well." GuaranteeCheck's guidance for Renewbrook is treated as lower-confidence than for the other two servicers for exactly that reason.

How to reach Renewbrook about this

The most direct route is Renewbrook Servicing's billing/account team. Follow up by phone if you don't hear back by email — there's no confirmed BBB escalation path yet for this servicer specifically.

Email:customerservice@renewbrookservicing.com
Phone:(888) 332-1650
What GuaranteeCheck does

The same honest check, with the confidence level stated plainly.

GuaranteeCheck's Renewbrook claim letter includes the contact guidance above and is upfront that the escalation path is less established than SunStrong's or Sunrun's — we'd rather tell you that directly than imply more certainty than the record supports.

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Not affiliated with Renewbrook. GuaranteeCheck is an independent self-help tool. We never contact Renewbrook on your behalf — the letter is yours to review, sign, and send.