Tariff coverage
Does it handle every grid tariff structure and contract type in your portfolio, including time-of-use and demand charges?
Platform comparison
Best PPA billing and savings reporting software for C&I solar portfolios.
For teams invoicing commercial and industrial (C&I) solar under PPAs and proving savings to clients. Six criteria for choosing software and a fair look at the types of option. AMMP is one of them, not the only good one.
Six criteria for PPA billing software
Metered, auditable numbers
Can every invoice line be traced back to meter data, the tariff and the contract?
Data quality handling
How does it handle missing data, and does the invoice say which values were estimated?
Billing period lock
Is the billing month frozen once invoiced, so numbers don't change afterwards?
Client-facing reports
Can savings and invoices go to clients on a schedule, with your branding on reports?
Data access
Can you take the data with you through an API, an MCP server and exports?
The options
AMMP
A vendor-agnostic platform for solar, battery, hybrid, wind and genset portfolios: AMMP OS Platform for monitoring and operations, and AMMP AI (Ray), an AI coworker that can also run on top of an existing monitoring stack.
Fits best: C&I portfolios that want billing, savings and performance reports from the same data as monitoring.
PPA billing with AMMPSpreadsheets and ERP billing
Meter readings exported from monitoring and invoiced in spreadsheets or an ERP system.
Fits best: Small portfolios with simple tariffs and a team that maintains the workbook.
Manufacturer portals
Each inverter brand's own portal, such as Huawei FusionSolar, Sungrow iSolarCloud and SMA Sunny Portal.
Fits best: Single-brand portfolios that only need that brand's data.
AMMP vs Manufacturer portalsInvestor and PPA reportingRead: automated PPA billing for solar
Frequently asked questions
What is PPA billing software?
Software that turns meter data, tariffs and contract terms into PPA invoices and savings reports for each off-taker.
What should C&I solar PPA billing software include?
Coverage of every tariff and contract type, invoices traceable to meter data, clear handling of estimated values, a locked billing period, scheduled client reports and open data access.