Multi-Meter and Multi-Site Commercial Solar: Map the Right Accounts First

For multi-meter commercial solar, map the legal entities, properties, buildings, utility accounts, physical meters, and loads before ranking any site. Then overlay shared electrical equipment, roofs, land, parking, access, and operating dependencies. A corporate rollup, consolidated invoice, common owner, or campus total does not change the underlying meter or utility boundary.

Use one conservative planning rule: do not assume electricity, production value, or bill credits move from one meter or site to another. This guide excludes virtual and community solar and does not evaluate any credit-allocation arrangement. Each proposed project needs its own account, meter, site-control, utility, physical, and approval analysis.

The purpose of the map is not to make every property look like one large project. It is to produce a clean shortlist:

• which sites have enough verified evidence for site-specific feasibility;
• which sites need an account, authority, meter, roof, electrical, or utility question resolved;
• which sites should wait for a lease, reroof, acquisition, disposition, or operating change; and
• which site or configuration should leave the current wave.

This page owns that portfolio-screening decision. The commercial utility-data guide owns bill and interval-file validation. Full financial results belong in the commercial solar ROI guide, not in an early portfolio rank.

Define what “multi-meter” and “multi-site” mean in your portfolio

Those terms describe different problems. Record which one applies instead of treating them as synonyms.

Situation	What it means for the map	First question
One building, one utility meter	The simplest account boundary, though ownership and site conditions still matter	Does the account and meter cover the load in the proposed project boundary?
One building, several utility meters	Separate billed services exist at the same structure	Which loads, rates, account holders, and electrical sections belong to each meter?
Several buildings, one master utility meter	The utility sees one billed boundary while internal distribution serves multiple buildings	Which loads are behind the master meter, and which internal meters are only submeters?
Several buildings, several utility meters	A campus or property contains multiple billed boundaries	Which building and equipment does each utility meter actually serve?
One company, several properties	Corporate ownership links the business, not the electrical services	Which legal entity owns, leases, operates, and pays each site?
One invoice, several accounts	Billing may be administratively consolidated	What underlying accounts, meters, rates, and service points remain separate?
Landlord and tenant accounts	Roof/property control and electric-account control may sit with different parties	Who can authorize the property work and who can act for the utility account?

A spreadsheet labeled “Charleston campus” or “Store portfolio” is an internal management view. The utility may see many accounts and service points. The facilities team may see a master switchboard plus several tenant meters. Property records may identify more than one parcel or legal owner. A landlord may own the roof but pay only the common-area account.

Name all of those boundaries. Solar screening becomes unreliable when an organizational label replaces the underlying facts.

Build a five-level map before comparing sites

Use linked tables with stable IDs. Do not force every fact into one enormous row; that makes ownership changes, shared meters, and evidence revisions difficult to trace.

1. Legal entity

Record the exact legal entities that:

• own the real property;
• hold each utility account;
• lease or operate the space;
• would buy, finance, lease, or otherwise contract for the solar asset if a structure is later selected;
• can sign property, construction, and utility documents;
• control a parent company, subsidiary, association, partnership, or special-purpose entity involved in the site; and
• must approve capital, insurance, lender, tenant, board, or procurement decisions.

Do not substitute a brand name for a legal name. “Regional warehouse division” may be useful internally but may not be the property owner, customer of record, or authorized contracting party.

2. Property or site

Give each property a stable site ID. Capture its service address, parcel or campus boundary, property owner, lease status, known easements, planned sale or redevelopment, and areas potentially available for a roof, ground-mount, or carport concept.

A site can contain multiple buildings and accounts. Conversely, a legal entity can control many noncontiguous sites. Keep those relationships linked without combining them.

3. Building or load

Identify every building, tenant area, production process, exterior load, pump, parking area, or other material load. Record what it does, who operates it, normal hours or shifts, expected changes, and which meter is believed to serve it.

Use “believed” until the relationship is documented. Similar meter addresses, facilities nicknames, and accounting codes are not conclusive electrical evidence.

4. Utility account

For each account, capture the full legal utility name, customer of record, service address, account identifier in the controlled source file, rate code and riders, bill coverage, and utility contact or portal used for confirmation.

The utility cannot be assigned from a South Carolina city alone. Duke Energy Carolinas and Duke Energy Progress are different legal utilities. Dominion Energy South Carolina, Santee Cooper, electric cooperatives, and municipal providers have their own account and rate structures. Start with the current bill and direct provider confirmation, using the Sunburst utility hub only as a navigation aid.

5. Physical meter and electrical service

Record the physical meter ID, location, voltage/service information when documented, upstream and downstream equipment, building or load served, and whether it is a utility billing meter, a customer submeter, a generation meter, or another monitoring point.

The account-to-meter relationship can change. Log meter exchanges, service upgrades, account transfers, consolidated-billing changes, and construction dates. Preserve the prior relationship with an effective date instead of overwriting history.

Use an account-to-building matrix as the control document

The first usable deliverable is a matrix that makes uncertainty visible.

Site ID	Building/load	Property owner	Account holder	Utility/account	Physical meter	Rate source	Relationship status	Next evidence action
SC-01	Warehouse and office	Verified entity	Verified entity	Current bill retained	Field label matched	Official schedule saved	Documented	Validate interval coverage
SC-02	Retail common areas	Verified entity	Owner affiliate	Current bill retained	Meter location unconfirmed	Code shown on bill	Investigation required	Walk site and obtain one-line
SC-03	Tenant suites	Owner entity	Several tenants	Bills not authorized	Several meter IDs reported	Unknown	Missing	Confirm tenant participation and account authority
SC-04	Closed branch	Verified entity	Verified entity	Historic account	Meter removed	Superseded	Not representative	Hold pending disposition decision

These are example statuses, not claims about any Sunburst project. The matrix should link to source files: deeds or leases reviewed by the owner’s professionals, current bills, utility correspondence, meter photos, one-line diagrams, panel schedules, site plans, and facilities notes.

Use a small evidence vocabulary:

• Documented: supported by a current source appropriate to the fact.
• Owner-reported, unverified: plausible but not yet supported.
• Investigation required: conflicting or incomplete evidence could change the boundary.
• Missing: the expected fact or record is unavailable.
• Superseded: once valid, but no longer current for the proposed decision.

This prevents a common portfolio error: complete-looking rows with hidden guesses. Unknown meter identity should not become a blank cell that a later analyst interprets as “same as above.”

Draw the meter hierarchy and prevent double counting

A site map should show which meters sit inside other metered boundaries.

EPA ENERGY STAR’s current campus benchmarking guide provides a useful hierarchy method. It distinguishes parent/campus meters from child-building meters and warns that adding a child meter to a campus total double-counts consumption when the master meter already captures that child load.

Apply the logic to the owner data map:

1. Start with every utility billing meter.
2. Trace the buildings and equipment downstream of each meter from reliable drawings, labels, and field review.
3. Add owner or tenant submeters beneath the billing meter they measure.
4. Mark whether a submeter measures the entire child building, one panel, one tenant, or one process.
5. Identify gaps where a master meter includes loads with no submeter.
6. Identify overlap where two internal data streams measure some of the same electricity.
7. Choose the meter series used for each comparison and record why.

Do not add all files merely because they exist. A master-meter bill plus every downstream submeter is not the site’s total electricity use; it is the total plus repeated portions of the same load. Likewise, a set of submeters may not cover unmetered common equipment that still appears on the master bill.

The hierarchy also shows what cannot be concluded. If one utility meter serves three buildings without complete submetering, the portfolio can know the campus boundary but not each building’s measured share. A temporary engineering or metering plan may be needed before a building-level decision. Do not manufacture the missing division from floor area and present it as measured use.

Keep account data separate before making comparable views

After the map is stable, collect source records for every included account:

• original utility bills for a representative period;
• rate schedule and riders from the current official source;
• interval data when available, with meter, timestamp, duration, unit, and direction documented;
• billing-demand fields when present;
• estimated-read, rebill, meter-change, and adjustment flags;
• existing solar, storage, generator, import, export, and production records where relevant; and
• dated operating changes for the site and load.

The commercial solar utility-data checklist explains how to reconcile interval totals to bill periods and preserve an exception log. Apply that validation account by account before building portfolio comparisons.

DOE’s current distributed-energy project-identification framework supports using annual electricity data for early screening and more detailed time-series data during deeper validation. It also identifies site boundaries, available area, bills, rates, and operating data as common inputs.

That staged approach avoids two extremes. A company does not need full engineering at 40 properties to identify which sites deserve attention. It also should not send a capital request based only on annual dollars and aerial roof area.

Build analytical views only after the records share clear definitions. Useful fields can include:

• evidence current-through date;
• included account and meter coverage;
• building use and operating schedule;
• annual and monthly measured consumption with the period stated;
• interval-data availability and quality status;
• current rate code and source date;
• ownership and lease horizon;
• roof, land, or parking screen status;
• facility master-plan conflict;
• shared-infrastructure dependency;
• authority/site-control status; and
• next required review.

Do not call a site “best” because it has the largest bill. A large account may belong to a tenant the owner cannot direct, a facility planned for sale, a building with an unresolved roof, or a service whose rate and operating pattern require closer analysis. Those are decision gates, not small score adjustments.

Overlay shared infrastructure without assuming a combined project

Multi-building properties often share assets. Show those assets on a separate overlay rather than hiding them inside a single meter label.

Review available records for:

• utility-owned or customer-owned transformers;
• main service equipment and switchgear;
• feeders between buildings;
• meter cabinets and current-transformer enclosures;
• generators, transfer switches, UPS equipment, batteries, or microgrid controls;
• central plants, pumps, refrigeration, data, or process loads;
• common roofs, parking areas, carports, land, fire lanes, and access;
• trenches, conduits, easements, stormwater routes, and underground utilities;
• monitoring networks and communications ownership;
• maintenance access and shutdown constraints; and
• future capacity, renovation, demolition, or expansion plans.

For each asset, record who owns it, which sites or loads depend on it, what evidence exists, which professional or utility must review it, and what happens if it is unavailable.

“Shared” means a common dependency to investigate. It does not establish that one array can connect across several services, that loads can be combined for billing, or that production associated with one meter affects another account. A common transformer may be utility-owned. A feeder may cross a parcel or serve a tenant. A roof may span a building whose electrical services are divided. Only site-specific engineering, ownership review, and utility confirmation can establish an acceptable design path.

The physical configuration comparison—rooftop, ground-mount, carport, or a phased combination—belongs in the commercial solar layout guide. The portfolio map should identify which option needs study, not select a universal winner.

Separate legal authority from utility-account control

Property ownership and utility-account control answer different questions.

For every site, identify:

• legal property owner;
• leasehold or management rights;
• roof, parking, land, access, and restoration rights;
• account holder and party authorized to obtain bills or interval data;
• prospective project contracting party;
• entity that can sign utility documents if the project advances;
• board, lender, insurer, tenant, or procurement approvals; and
• assignment or disposition risks during the expected project horizon.

A parent company may consolidate financial reporting while subsidiaries own different properties and hold different accounts. An affiliated entity may pay invoices without owning the site. A landlord may control the roof while a tenant controls the largest electrical account. A property manager may obtain bills but lack authority to approve construction.

Do not resolve those differences with an organization chart alone. Ask counsel and the responsible company officers to document the authority path. If a leased property is material, the leased commercial-building solar guide provides a fuller owner-tenant-site-control checklist. It expressly requires written owner authorization and counsel review; this portfolio article is not legal advice.

Current South Carolina utility materials also treat site control and the utility customer role as distinct evidence. For example, Santee Cooper’s current generator-interconnection page identifies a site-control form for applicable requests. That provider-specific example does not establish the requirements for every site. It shows why the portfolio must retain the correct parties before a site enters a later utility process.

Treat consolidated billing and profile comparison as administrative tools

One statement or dashboard can help a facilities team manage many accounts. It does not erase the underlying services.

Dominion Energy South Carolina currently says qualifying large customers can ask about consolidated billing, and it describes an interval service that can compare or combine analytical profiles for selected meter groupings. See Dominion’s large-customer account services and interval-metered business service.

Use those features for the purpose the utility confirms. Do not treat a single payment, portal view, or analytical chart as evidence that:

• the accounts share a rate;
• the meters are behind one electrical service;
• one site can use another site’s production;
• a proposed system relates to every account in the view;
• a utility will accept a combined application; or
• the underlying account holders and service points have changed.

The same caution applies to internal energy-management software. DOE’s energy-management information-system guidance describes whole-building tracking and comparisons among buildings. Those comparisons help owners ask better questions; they do not change utility rules or physical meter boundaries.

Retain both views: a management rollup for screening and the account/meter ledger that controls source identity.

Confirm every advancing site with the named utility

For each site that survives early screening, prepare a short utility question packet. Do not ask the utility to confirm a vague “portfolio.” Identify the specific service.

Include:

• legal utility and customer name from the current bill;
• service address, account, and physical meter;
• property/site ID and building or load served;
• current rate code and riders as shown in the source records;
• existing on-site generation or storage, if any;
• conceptual project location and the electrical boundary under investigation;
• property owner, account holder, and authorized contact roles;
• known shared infrastructure or meter hierarchy; and
• the exact question that needs a written answer.

At this stage, appropriate questions include whether the provider/account identification is correct, which current tariff and process documents should be reviewed, what account-specific load history is available, and what site/account facts a later application will require. Do not ask for or publish a promised approval, upgrade cost, schedule, project size, cross-meter treatment, or financial result.

South Carolina utilities publish multiple commercial rate schedules. Dominion’s current rates and tariffs page and Santee Cooper’s rate hub illustrate why “commercial rate” is not a usable portfolio field. Record the exact current source for each account and recheck it before modeling.

If a site advances to an application or study, use the South Carolina commercial interconnection guide for the separate design-control and authorization chain. A portfolio screen is not construction authorization or permission to operate.

Prioritize with hard gates and evidence quality

Do not bury a fatal unknown inside a weighted score. Use gates first, comparisons second.

Gate 1: portfolio inclusion

Confirm that the property is actually within the owner’s decision scope. Exclude a sold site, duplicate row, unrelated affiliate, or account that does not serve the target property.

Gate 2: authority and horizon

Check property control, account cooperation, authorized decision-makers, lease/disposition horizon, and required internal approvals. A promising roof should not advance while the owner or contracting authority is unresolved.

Gate 3: meter and load boundary

Confirm which utility meter and account serve the proposed load. Resolve master/submeter overlap, tenant accounts, missing services, and existing generation. A large combined total is not a substitute.

Gate 4: physical and operational screen

Identify usable area, roof or land plans, obvious structure/electrical unknowns, access, drainage, fire/operations conflicts, and shared-infrastructure dependencies. This remains a screen until responsible reviewers complete deeper work.

Gate 5: utility-specific next path

Verify the utility, rate source, current provider documents, and account-specific question. Do not assume the same process or tariff across the portfolio.

After the gates, assign one neutral next-action status:

Status	Meaning	Required output
Advance to site-specific feasibility	The early map is sufficiently documented for deeper technical, utility, and financial work	A controlled site packet and assigned reviewers
Investigate material unknown	One or more facts could change the boundary or feasibility path	Named question, owner, evidence request, and due date
Hold for business/site change	A known lease, reroof, sale, expansion, closure, or capital decision makes current work premature	Revisit trigger and current-through date
Remove this configuration	An authorized decision-maker has rejected the present site/configuration based on a documented constraint	Reason, evidence, and whether another site/configuration remains open

DOE’s current project-identification guidance describes portfolio screening as a way to prioritize locations for further assessment. It does not make screening a final feasibility or investment decision. Preserve that boundary: a shortlist controls where the owner spends the next round of effort.

Build one site packet for every advancing location

Do not send one portfolio deck into site-level review. Create a repeatable packet for each advancing site:

1. site cover sheet and decision owner;
2. entity, property, account, and meter hierarchy;
3. original bills, validated data manifest, and rate sources;
4. building/load and operating chronology;
5. site-control, lease, and authorization status;
6. shared-infrastructure overlay and open electrical questions;
7. roof, land, parking, access, and master-plan screen;
8. existing solar, storage, generator, and monitoring boundary;
9. utility confirmation record and current documents;
10. evidence-quality and exception log;
11. current concept, exclusions, and alternatives requiring study; and
12. next professional, utility, owner, or counsel review.

Use the same template at every site, but do not force the same answer. A warehouse, leased retail center, agricultural property, municipal facility, and multifamily common area can have very different authority, operating, rate, and infrastructure constraints.

The broader site evidence decision belongs in the commercial solar feasibility study guide. Competing bidder scope belongs in the commercial proposal checklist. The packet here is the bridge into those later decisions.

Use a proceed-or-pause checklist

Advance a site only when the owner can say:

• we know which legal entity owns or controls the property;
• we know who holds and can act for the relevant utility account;
• the account, physical meter, building, and load relationship is documented;
• master meters and submeters are not double counted;
• the serving utility and current rate source are verified for this account;
• bills and interval records have a visible quality status;
• leased, tenant, lender, insurer, board, and procurement dependencies are identified;
• shared electrical and property infrastructure are mapped as questions, not assumptions;
• future sale, closure, expansion, reroof, or operating changes are dated;
• no energy or bill value has been assumed to transfer among meters or sites;
• the site has a named next reviewer and a controlled evidence packet; and
• the portfolio rank is labeled as screening, not feasibility, approval, or an outcome promise.

Pause when the project boundary depends on an unidentified meter, a tenant account without participation, disputed site control, a consolidated invoice with missing underlying services, a master/submeter conflict, or a shared electrical asset whose ownership and function are unknown.

Sunburst’s public service page confirms commercial solar work in South Carolina, but it does not define a formal multi-site portfolio-evaluation package. Once your organization has a preliminary site/account manifest, request a commercial solar assessment and ask Sunburst to confirm in writing whether the named properties, accounts, utilities, and desired screening work fit its scope before sending records. No site should be treated as accepted, ranked, or feasible until that scope and the required evidence are defined.

How Sunburst screens a South Carolina portfolio

Multi-site work rewards sequencing. Sunburst starts with the control document this article describes — entities, buildings, accounts, meters and shared infrastructure — then applies hard gates before any site consumes design hours: site control, roof or land condition, service capacity, and the specific utility’s current rules for that account. Portfolios spread across South Carolina frequently sit in three or four different provider territories, and a rule that applies in Dominion territory may not apply at a Santee Cooper or cooperative site a county away.

Advancing sites then get individual packets: utility data, feasibility evidence, a layout comparison and an interconnection plan. Leased locations need the site-control review first.

Our commercial solar service covers portfolio screening through construction statewide; see commercial solar by city or request a commercial assessment.

Frequently asked questions

Can one commercial solar system serve several meters?

Do not assume it can. Several meters may represent separate utility services, account holders, rates, electrical sections, or buildings. Shared property or equipment does not answer the utility, engineering, or authorization question. This guide excludes credit-allocation arrangements. Map the services and ask the named utility and responsible electrical professionals about the specific proposed configuration.

Does one company name on every bill make the accounts one solar project?

No. Common corporate ownership can simplify internal coordination, but the accounts, meters, tariffs, properties, electrical services, and utility review paths remain facts to verify individually. The legal property owner, account holder, contracting entity, and authorized signatory may also differ among sites.

Does consolidated billing combine the meters for solar?

Do not infer that. Consolidated billing can make payment or account management easier while underlying accounts and service points remain distinct. Retain every account, meter, rate, and service address in the ledger, and obtain account-specific utility confirmation.

How should master meters and submeters be counted?

Draw the hierarchy first. If the master utility meter already captures a child building or tenant submeter, adding both values double counts that load. Use the master series for the full billed boundary or documented submeters for a supported internal allocation question, but label gaps and overlap. Do not invent building-level measured use where the metering does not provide it.

Should the site with the largest electric bill go first?

Not automatically. Bill size says nothing by itself about property authority, meter relevance, roof or land condition, rate structure, interval alignment, utility path, planned disposition, or operating change. Apply hard gates, then compare sites with normalized fields and visible evidence quality.

What if tenants hold most of the utility accounts?

Separate roof/property control from account control. Identify the landlord, tenants, account holders, leases, common-area meters, and authorization path. Obtain written owner approval and counsel review before relying on a structure that affects tenant rights or obligations. Do not assume tenant use benefits the owner or that one account can affect another.

Can sites served by different South Carolina utilities use one set of assumptions?

No. Use a common data template, but verify each legal utility, rate, account, data availability, and current process separately. Even sites under the same utility brand can have different service classes or riders. City name is not proof of provider.

When is a portfolio screen ready for site feasibility?

When the owner can trace the legal entity, property, account, meter, load, rate source, operating history, site-control status, and major shared dependencies; when material gaps have assigned actions; and when the site packet states what remains unverified. Readiness means the next investigation is well defined, not that the site is approved or financially attractive.

Sources and methodology

This article applies federal portfolio-screening and campus-metering methods to an owner-side South Carolina commercial decision. It uses current utility pages as examples of why account and meter confirmation must remain provider-specific. Sources were checked August 10, 2026.

• DOE FEMP: Distributed Energy Project Identification
• DOE FEMP: Procure a New Photovoltaic System
• DOE FEMP: Energy Management Information System Capabilities
• EPA ENERGY STAR: How to Benchmark a Campus
• Dominion Energy South Carolina: Large Customer Account Services
• Dominion Energy South Carolina: Large Business Services
• Dominion Energy South Carolina: Rates and Tariffs
• Santee Cooper: Current Rates
• Santee Cooper: Generator Interconnection Standard