The California Standard
Every Charge Traceable.
Every Dollar Provable.
Utility billing compliance for California manufactured housing operators. Full-service billing backed by certified rates, automated compliance checks, and a complete audit trail — from tariff document to resident bill.
Why Compliance Can't Be a Black Box
California's Mobilehome Residency Law requires precise utility billing — correct rates, proper disclosures, CARE and FERA discount passthrough, and no charges above the utility's published tariff. Violations expose operators to private litigation with attorney fee provisions that incentivize enforcement.
Most operators either handle billing themselves — and carry the compliance risk — or hand it to a provider who can't show how charges are calculated.
Neither is good enough.
What Sentinel Delivers
Every Rate Certified to Source
Every billing rate traces to a published utility tariff document. Sentinel monitors tariff filings from SCE, SoCalGas, PG&E, Cal Water, EMWD, and more — and certifies rates before they're used in any bill. No manual rate lookups. No stale data.
5+ Utilities Monitored
14 California Rules, Every Bill
Every bill is validated against fourteen California compliance rules at issuance — spanning the Mobilehome Residency Law and the Public Utilities Code — including CARE/FERA discount passthrough, rate parity with direct-service tariff rates, purveyor-bill-sourced water charges, required disclosures, and meter reading documentation. Every statutory check cites the specific code section it enforces.
14 Compliance Rules · Every Bill
We Handle Everything
From meter reading to Rent Manager posting, Sentinel operates your utility billing end to end. You see proof of every charge — without doing any of the work. Residents get a self-service portal with their billing history, usage data, and rate schedules.
End-to-End Operations
The Hidden Cost
Stale Rates Don't Just Create Risk — They Cost You Money
When utility rates change and your billing provider doesn't catch it, you're not just exposed to compliance violations — you're under-billing every resident on the property. Month after month.
Sentinel re-checks every rate source on a set schedule. When a tariff changes, you see exactly what changed, its effective date, and the source tariff text behind it — and the new rate reaches a bill only after you approve it. Not last quarter's rate. Not last year's rate. The rate that was in effect for the period you're billing.
The Audit Trail
Every Charge Has a Paper Trail
When a regulator, attorney, or resident asks “where did this charge come from?” — the answer is immediate and complete. Every line item on every bill connects to a documented chain of evidence.
Published Tariff Document
Original PDF from utility website, SHA-256 hash verified and archived
Document Verified & Archived
Stored with cryptographic hash, timestamp, and source URL for reproducibility
Rate Data Extracted
AI-assisted extraction with confidence scoring and human review when needed
Rate Schedule Certified
Versioned, effective-dated, linked to source document with full provenance
Compliant Bill Generated
Deterministic calculation with 14 California compliance rules validated at issuance
Delivered to Residents & Property Management
Bills posted to resident portal and property management system, itemized by utility type
Flexible Service Levels
Choose Your Level of Involvement
Platform
You run billing. Sentinel makes sure every rate, every charge, and every source is correct — automatically.
- Automated rate certification
- Compliance validation
- Bill generation with full provenance
- Resident portal
- Property management integration
You handle meter reads and resident disputes.
Managed
Your staff read meters; Sentinel operates everything else.
Everything in Platform, plus:
- Sentinel runs the billing operation from your staff's reads
- You print and mail statements
Quoted individually.
Full Service
Sentinel end to end.
Everything in Platform, plus:
- Monthly meter reads by a licensed, insured contractor — never your staff
- Resident support handled by Sentinel
- We stand behind every bill we issue
You see the proof. We do the work.
All three run on the same technology. Start with Platform and upgrade when you're ready to go fully hands-off.
Let's Talk About Your Properties
We work with California manufactured housing operators who want accurate, defensible utility billing without the operational burden. If that sounds like you, we'd welcome the conversation.