Point-of-interconnection engineering is where developer schedules meet utility requirements. American Power Engineers supports developers, IPPs, and EPCs through interconnection studies, POI design, and utility coordination.
We support developers and EPCs through every stage of point-of-interconnection engineering — from facility study and system impact study (SIS) review to POI single-line design and direct utility coordination.
Interconnection queues, shifting utility technical requirements, and grid impact findings create real schedule and cost exposure for anyone connecting generation or storage to the bulk power system. A POI design that doesn’t anticipate a utility’s specific review criteria is one of the most common sources of avoidable project delay we see. Our role is to close that gap: we know how utility and ISO/RTO reviewers read a POI package, and we build ours to hold up under that scrutiny the first time.
Standards our POI engineering is built against: IEEE 1547, IEEE 2800-2022, ANSI C37 protection standards, and applicable NERC reliability requirements for interconnecting facilities.
Direct, working familiarity with utility and ISO/RTO interconnection workflows, not secondhand knowledge of the process.
We read utility study results and SIS findings the way a reviewer will read our response, catching gaps before they become RFIs.
Electrical, protection, and communications scopes coordinated by one team instead of handed off between disconnected specialists.
We represent your technical position directly in utility coordination calls, not just on paper.
Deliverables sequenced against interconnection milestones, because a technically perfect package delivered late still costs you time.
Share a few details and our team will follow up to scope your POI Interconnection Engineering engagement. Qualified inquiries only — we respond to developers, utilities, EPCs, and industrial owners.
Tools and platforms used on a given project depend on scope, utility requirements, and client preference.
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Core capability areas delivered as part of this engineering practice.
Support through facility studies, system impact study (SIS) review, and utility comment-response cycles.
Single-line development, protection scheme design, and equipment specification at the point of interconnection.
Technical input to LGIA/SGIA exhibits and negotiation support.
Direct engagement on grid impact findings and mitigation design.
Ongoing technical interface with the transmission or distribution owner through review cycles.
Submission-ready packages built to the format and depth utility reviewers expect.
Structured engineering execution from scope definition to final deliverables.
Confirm interconnection pathway, utility/ISO territory, and applicable standards.
Independent review of utility study results and findings.
Develop the POI single-line, protection scheme, and equipment specifications.
Prepare and support the utility submission and comment-response cycles.
Lead or support technical calls with the utility.
RFIs and field support through energization.
Interconnection-driven studies for solar, wind, and BESS projects.
Planning and protection studies on transmission and distribution systems.
Arc flash, coordination, and short circuit work for plant safety and reliability.
Study support during design, and commissioning phases.
Generation interconnection and operational study support.
Studies supporting public-sector power infrastructure projects.
Download our placeholder POI Interconnection checklist to align scope and data needs early.
Representative engagements illustrating typical scope and approach.
Evolving utility requirements created schedule risk on the POI design.
Refined POI single-line and supported comment-response cycles with the utility.
Engineering aligned with utility interconnection requirements.
Transmission-connected BESS required careful POI engineering and study coordination.
Provided POI design and study support across multiple project phases.
Coherent interconnection package supporting next phase of engineering.
POI substation upgrade required to accommodate revised utility requirements.
Updated POI single-line, protection, and equipment specifications.
Updated POI package aligned with current utility expectations.
Our team supports developers, utilities, EPCs, and industrial clients with precise, standards-aware engineering services across North America.
Common questions about scope, deliverables, and engagement structure for power system studies.
This depends on the utility or ISO/RTO’s specific queue rules, but generally a Facility Study is triggered once a System Impact Study identifies required upgrades or mitigations. We review your SIS results early specifically to flag whether a Facility Study is likely, so it doesn’t surprise your schedule later.
We treat comment-response cycles as part of the core scope, not a separate change order. Our POI single-lines are built with the utility reviewer’s likely questions in mind from the first draft, which is why our revision cycles tend to be shorter than a redesign done reactively.
We provide the technical content and analysis behind interconnection agreement exhibits and can support technical discussion points during negotiation. Legal negotiation of contract terms should involve your counsel; we focus on ensuring the technical exhibits accurately reflect your project’s design.
Yes, and it’s a common entry point for us. We start by reviewing the existing SIS/Facility Study record and POI design against current utility requirements before proposing next steps, so we’re not duplicating work that’s already been accepted.
Inverter-based resources (solar, wind, BESS) contribute fault current differently than synchronous generators and must demonstrate reactive capability across their full operating range. Our POI designs account for this from the outset rather than retrofitting it after a utility raises it — see our guide to EMT analysis for inverter-based resources for the underlying modeling considerations.
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HV/MV substation engineering with protection, control, civil coordination, and equipment specification support.
Registered entities face complex NERC reliability obligations and recurring audit cycles.
DC and AC electrical engineering for utility-scale PV plants, including collection design and interconnection support.
