For years the standard advice to utilities running SAP IS-U on ECC was straightforward: Joule and the newer agentic AI capabilities were cloud-native features of S/4HANA, and on-premises customers would need to plan their migration to access them. In May 2026, SAP changed that position. The shift matters for utilities mid-migration or still evaluating their path forward, but the conditions attached to it matter equally.
What SAP Changed
Around May 13, 2026, SAP announced that Joule assistants and agents would work in hybrid landscapes connecting on-premises S/4HANA and ECC systems to the SAP AI infrastructure. This reversed a previously clear boundary: the most capable Joule features had been positioned as exclusively cloud, meaning any utility wanting them would need to complete its transition to S/4HANA in the cloud first.
The reversal allows a utility still running IS-U on ECC to access Joule agents without completing a full system migration first. That is a meaningful change in timeline flexibility for organizations with complex, multi-year migration programs. For background on the IS-U platform and its modules, the SAP IS-U guide covers the architecture in detail.
The Conditions: RISE with SAP and the Max Success Plan
The announcement came with conditions that significantly narrow who benefits. According to SAP’s own framing and reporting by CIO.com, the hybrid Joule capability requires two things: enrollment in RISE with SAP, which is SAP’s subscription-based managed cloud offering, and subscription to the Max Success Plan, which is a paid premium support and services tier on top of RISE.
A utility on a standard RISE contract without Max Success Plan does not qualify. A utility on an on-premises license agreement without RISE does not qualify. The announcement reaches a narrower audience than the headline implies: organizations already on RISE or prepared to move to it, and willing to pay for the Max Success Plan tier, can connect their on-prem systems to Joule agents. For utilities deep in multi-year IS-U migrations, this could be meaningful if the cost of the Max Success Plan is lower than accelerating the full cloud migration. For those not yet on RISE, the on-prem AI offer is, in practical terms, a cloud commitment with an on-prem connectivity feature attached.
The SAP Business Technology Platform layer that underpins this connectivity is worth understanding for any utility evaluating the architecture. The SAP BTP overview explains how BTP functions as the integration and extension layer that makes hybrid scenarios like this technically possible.
Why It Matters for IS-U on ECC Utilities
SAP IS-U on ECC is running on a defined support clock. Mainstream maintenance runs through 2027; extended maintenance is available through 2030. The forward path SAP supports is S/4HANA Utilities. For utilities that have not yet migrated, the 2030 extended maintenance boundary is the practical hard deadline for planning their transition.
The May 2026 announcement does not change those dates. What it changes is the calculus about when a utility needs to complete the cloud migration in order to access modern AI capabilities. Previously, any utility wanting Joule agents had to move to S/4HANA in the cloud first. Now, a utility can get Joule agents on its existing ECC landscape if it is on RISE with Max Success Plan, potentially buying time for a more deliberate migration while still accessing AI tooling.
For utilities still comparing their options, the Oracle vs SAP utilities comparison provides useful context on where each vendor’s AI roadmap stands relative to on-prem and cloud deployment models.
The Analyst Pushback
The analyst community’s response was cautious. Reporting by The Register in May 2026 summarized Gartner and Forrester concerns that the RISE with SAP plus Max Success Plan structure effectively functions as a lock-in mechanism. Analysts described it as a path that draws customers in with the promise of AI on existing systems but requires a cloud commitment as the price of entry, making it harder to exit the SAP cloud ecosystem later.
The criticism is structurally consistent with how enterprise software vendors have historically bundled new capabilities into subscription tiers. Utilities should pressure-test whether the Max Success Plan pricing, combined with RISE subscription costs, represents genuine value compared to accelerating the migration to S/4HANA Utilities on their own timeline.
A Practical Read for Utilities Mid-Migration
For a utility in active IS-U migration, the May 2026 announcement is most useful as a planning input rather than a direction change. The core migration to S/4HANA Utilities remains the right long-term path; the 2027 and 2030 maintenance dates have not moved. What is new is that a utility can now access Joule agents on a hybrid ECC landscape as an interim state, provided it is prepared to take on the RISE with Max Success Plan commitment.
The questions worth asking are: Does the AI capability accessible through the Max Success Plan justify its cost relative to the migration timeline already planned? Which specific Joule agents are available in the hybrid ECC scenario, and do they address the highest-value processes in our operation? What does the contract structure look like if we decide to exit RISE later?
The SAP IS-U pillar page and the SAP BTP guide together provide the platform context that informs those questions. The on-prem AI offer from SAP is real, but so are the conditions attached to it. Utilities that enter it with clear-eyed expectations about cost and lock-in will be better positioned than those who treat it as a no-strings bridge to AI on legacy systems.