What do these billing terms actually govern?
Net metering describes an applicable method for crediting or accounting for electricity supplied by a customer-generator alongside electricity received from the utility. Net billing commonly distinguishes the value of imported and exported energy under the relevant tariff. The precise rules matter more than the label.
The markets hub connects distributed generation with utility and policy decisions. A hotel solar project needs an approved technical arrangement and an understood billing arrangement. Equipment installed on a roof is not evidence that an intended tariff, export rate, or supplier credit has been accepted.
Ask for the actual schedule, effective date, customer class, interconnection conditions, and supply treatment. A summary from another utility or residential property can identify questions, but it cannot establish the hotel’s program or compensation. Preserve the governing documents with the project model.
Which four energy quantities must be separated?
| Quantity | Meaning in the project record | Measurement question |
|---|---|---|
| Hotel load | Electricity required by the property’s services | Does it include all relevant meters and areas? |
| Solar generation | Electricity produced within the stated boundary | Is it measured before or after system losses? |
| Self-consumption | Generation used onsite in the relevant interval | Do generation and load actually coincide? |
| Grid imports and exports | Electricity exchanged through the meter | What intervals and registers support billing? |
DOE’s distributed-energy explanation distinguishes generation behind the meter and its connection with the grid. Use that physical picture before calculating credits. Energy produced onsite can serve load or be exported; it should not be counted as both for the same interval.
A monthly or annual generation total can obscure those flows. A hotel can export at midday and import later even if annual generation equals annual consumption. The billing result depends on whether and how the applicable tariff nets or values those exchanges.
What does a simple physical example show?
Assume an illustrative analysis period has hotel load of 100 kWh and solar generation of 60 kWh. Suppose 40 kWh of generation are used onsite and 20 kWh are exported. The remaining hotel load requires 60 kWh of grid imports. Generation reconciles as 40 + 20, and load reconciles as 40 + 60.
Every quantity is assumed. The example demonstrates a physical ledger, not a real meter result or a tariff rule. Without the self-consumption information, the analyst cannot infer that all 60 generated kWh avoided grid purchases. Only the stated 40 kWh did so under the example’s boundary.
Retain losses and meter locations when modeling a real project. An inverter production report and a utility export register can describe different boundaries. Reconcile them with the appropriate engineering and metering assumptions rather than treating every numerical difference as a billing error.
How do import and export prices change the value?
Using the same hypothetical quantities, assume an applicable import energy rate of $0.15 per kWh and an export rate of $0.05. Imports cost $9 and exports create $1 of credit, producing $8 for those energy components. No fixed, demand, tax, or other charges are included in this simplified calculation.
If an assumed alternative arrangement credited exports at $0.15 for the same scope, the credit would be $3 and the corresponding amount $6. Neither arrangement is a current utility tariff. The difference shows why export compensation and netting rules should be defined before the project is valued.
Avoid valuing all generation at a whole-bill average. A bill can contain demand, fixed charges, taxes, and other items that do not change with each exported kWh. Identify the avoidable import component and applicable export component separately, then model the remaining bill under its actual rules.
What does California’s example establish?
California CPUC’s net-metering and net-billing resource distinguishes its legacy NEM arrangements from the applicable net billing framework. It explains that export compensation under net billing follows a grid-value treatment rather than automatically matching retail imports. Use the page to locate the actual utility and program documents.
Do not apply that description nationally or assume every California hotel has the same arrangement. Existing enrollment history, utility, customer class, and applicable program matter. Confirm the hotel’s current tariff and any transition conditions before replacing an older project assumption with a new program label.
Model timing using the relevant schedule. A daily or seasonal export value can make the generation profile important, but a generic solar curve is still an assumption until adjusted for the property’s design and conditions. Identify the model, period, losses, and tariff inputs in the recommendation.
What does Ohio’s rule show about supplier contracts?
Ohio’s net-metering rule distinguishes utility tariffs from CRES provider contracts and requires an interconnection agreement for the relevant supplier arrangement. It also addresses ownership of renewable credits subject to contractual treatment. These are Ohio provisions, not a national hotel eligibility determination.
The distinction means a supplier change deserves its own review. A utility interconnection and a supplier export-credit product are different documents. Ask who values exports after the change, which credit balance remains, and how the relevant billing and settlement occur.
A monetary credit balance is not necessarily cash payable to the hotel. Check the actual carry-forward, use, expiration, and account-exit treatment before entering it as a receivable or project cash return. Keep the billed credit and any realized payment separately visible in the financial model.
Read the REC definition before making a renewable-use claim from the project. The export payment and the environmental attributes can have separate terms. Preserve the contract treatment of those attributes even when the billing model looks favorable.
How are demand charges and storage evaluated separately?
Solar generation can reduce a relevant power peak only if it coincides with the tariff’s chargeable measure and conditions. A hotel establishing demand after sunset may have a different result from one with a daytime peak. Ratchets and minimums can also affect whether a measured reduction changes the invoice.
Storage adds charging, discharge, efficiency, controls, and cost assumptions. It can change self-consumption and export timing, but the modeled benefit should not be counted automatically as both a retail avoided purchase and an export credit for the same energy. Use a timed ledger and state the operating objective.
Include guest service and equipment constraints in that objective. A financially attractive dispatch in an unconstrained spreadsheet can be unsuitable for actual hotel operation. Check the feasible schedule and verify performance before presenting modeled demand or export benefits as achieved results.
What does the billing mechanism leave unresolved?
A tariff credit does not establish an ENERGY STAR score or certification. The platform’s energy-performance record has its own definitions and boundaries. Keep physical generation, purchased energy, attribute accounting, and performance metrics separately labeled.
Likewise, building performance standards can have their own treatment of onsite generation or renewable attributes. Verify the local method and required evidence before presenting an export-billing benefit as a compliance result. The hotel’s investment case needs each relevant outcome supported independently.
What should the hotel verify before approving the project value?
- Confirm customer eligibility and the actual interconnection approval.
- Obtain the tariff and any supplier export agreement.
- Reconcile generation, load, self-consumption, imports, and exports.
- Apply correct credit rates, netting periods, and settlement rules.
- Model fixed and demand components separately.
- Preserve attribute ownership and check actual bills after operation begins.
If a broker arranges the supply or export product, identify its compensation and include it once. Keep installer cost, financing, and utility charges visible as separate inputs. A defensible net-metering or net-billing calculation ends with the tariff’s actual mechanics and a physical energy ledger the hotel’s team can reproduce.