DER Plan Sets — Small Commercial
Small commercial DER scope, battery and VPP-ready. Site assessment through AHJ-aware permit set, designed for projects up to 1 MW. Practitioner-led — built by a designer who has worked the residential-to-commercial step-up and knows what changes.
End-to-end small commercial DER plan set scope. Solar, storage, or hybrid.
Roof / ground / canopy analysis, shading and obstruction review, available array area, equipment placement zones.
Coordinated with structural PE for ballasted, attached, and ground-mount applications. Roof loading calcs, attachment patterns, racking selection.
Project single-line, panel schedules, equipment schedules, conductor and OCPD sizing, grounding and bonding details.
Available fault current calculation and AIC-rated equipment selection for service entrance and DER equipment per NEC 110.24 and utility coordination requirements.
ESS scope when applicable: battery sizing, coupling, telemetry, demand-response and VPP program eligibility considered upstream of design freeze.
Permit-ready package built to the conventions of the specific AHJ. Interconnection package coordinated with the utility's commercial DER queue.
Featured Deliverable
Arc flash incident energy calculations and equipment labeling per IEEE 1584 and NFPA 70E, with NEC 110.16-compliant labels. Coordinated for service or feeder equipment rated 1,000A and above (per NEC 2023 / 2026), and increasingly expected by AHJs on commercial DER projects regardless of threshold. Bundled with the engineering scope, not bolted on at the end.
Engineering Scope — Important
Design and drafting on small commercial DER projects are tiered by system size—published rates from $1,200 (50–100 kW) up to $4,500 (750 kW – 1 MW), with DER adders for storage scope. Engineering scope is never tiered. Load calculations, fault and short-circuit studies, selective coordination, arc flash analysis, three-phase service coordination, and structural roof loading vary too much across projects to fit a fixed price.
Every commercial project gets a dedicated engineering quote. We're transparent about what's published and what isn't on the first call.
Design and drafting are tiered by system size. Engineering is always quoted per-project.
Storage designs require NEC Article 706 (Energy Storage Systems) and NFPA 855 (Stationary ESS Installation) compliance review. We publish DER pricing for systems up to 250 kW; above that, code review hours vary by AHJ and scope, so we quote per-project.
Hands-on plan-set experience across commercial-suitable storage, modules, and inverters.
Ownership Models
We design plan sets for direct-purchase, loan-financed, and Third-Party-Owned systems — including Sunrun, Sunnova, Tesla, GoodLeap-financed, and other PPA / lease structures — plus VPP-enrolled systems post-PTO.