ISO 50001 — Energy management
ISO 50001-aligned design with HOMER Pro and HOMER Grid
Build defensible energy baselines, evaluate alternative system designs side by side, and quantify measurable improvements in energy, cost, and emissions — with audit-supporting documentation from the planning phase.
Step 1
Establish defensible baselines
Simulate the as-is system to produce a quantified Energy Baseline (EnB) that can support audit scrutiny when based on validated inputs and serves as the reference for every improvement claim.
Step 2
Compare alternative designs
Evaluate dozens of system configurations — generation mix, storage sizing, dispatch strategy, tariff response — in a single workflow with consistent assumptions.
Step 3
Quantify the improvement
Produce side-by-side comparisons of energy, cost, and emissions against the baseline — part of the quantitative evidence expected in the planning phase under ISO 50001 Clauses 6.2 to 6.4.
Where HOMER fits in the ISO 50001 lifecycle
ISO 50001 is built on a Plan–Do–Check–Act cycle. HOMER Pro and HOMER Grid are tools for the Plan stage: energy review, baseline construction, EnPI definition, and selection of action plans. They are not monitoring, metering, or M&V platforms — that distinction matters when you talk to an auditor, and we make it explicit on this page.
Plan
HOMER's domain
Energy review, baseline, EnPIs, action plans, design selection.
Do
Implement the action plan: procure, install, commission.
Check
Monitor and verify performance against the HOMER baseline using your M&V tools.
Act
Review results, update the baseline, plan the next improvement cycle — back to HOMER.
How HOMER maps to ISO 50001 clauses
The clause references below follow ISO 50001:2018. For each planning-phase requirement, the card describes what HOMER does, what it produces as evidence, and which product typically applies.
Energy review
HOMER characterises the site's energy sources, loads, and supply assets from measured or modelled inputs. Solar and wind resources from built-in NASA datasets, custom load profiles, fuel availability, grid tariffs — everything that defines the as-is energy picture lives in one model.
Use: HOMER Pro for off-grid, microgrid, and remote industrial sites. HOMER Grid for behind-the-meter C&I sites where tariffs and load shape dominate.
Significant energy uses (SEUs)
HOMER's load modelling supports disaggregation: separate primary loads, deferrable loads, thermal loads, and EV-charging loads each have distinct profiles and contribute distinct shares to total consumption. That decomposition is what auditors expect when you nominate SEUs.
Use: Both products. HOMER Pro covers thermal loads and combined-heat-and-power explicitly; HOMER Grid resolves time-of-use exposure on each load component.
Energy baseline (EnB)
Simulate the existing system over a representative period and HOMER produces the annual energy, cost, and emissions profile that defines your EnB. Because the baseline is built from a transparent set of inputs (resources, loads, equipment, tariffs), it is reproducible — the precondition for any defensible improvement claim later.
Evidence: Simulation log, input record, hour-by-hour dispatch trace, annual aggregates.
Energy performance indicators (EnPIs)
HOMER's output set maps directly onto common EnPI candidates: annual kWh consumed, levelised cost of energy, renewable fraction, fuel use, CO2 emissions, and unit-specific intensities (kWh per unit of output, $/kWh delivered). Choose the EnPIs that fit your organisation's energy policy and HOMER will produce them for the baseline and every alternative.
Methodology: Compatible with ISO 50006 guidance on EnB and EnPI selection.
Objectives, targets, and action plans
HOMER's optimiser sweeps the design space — PV size, battery capacity, generator dispatch, demand-response strategy — and ranks alternatives against the baseline by your chosen objective: net present cost, lifetime emissions, payback period, or a custom EnPI. The ranked list is your action-plan shortlist with savings already quantified.
Use: HOMER Pro's sensitivity sweeps for resource and price uncertainty. HOMER Grid's tariff-aware optimisation for demand-charge and time-of-use action plans.
Monitoring, measurement, and M&V
HOMER does not perform continuous monitoring, real-time metering, or operational M&V. Those activities — aligned with ISO 50015 or IPMVP — require a different class of tool that consumes live meter data. What HOMER does provide is the baseline and the predicted-performance figures against which those tools verify. Treat HOMER as the planning anchor for the M&V workflow that follows.
Two illustrative use cases
HOMER Pro — industrial site
Manufacturing plant building an EnB
A manufacturer with on-site diesel generation, grid import, and a planned solar-plus-storage retrofit needs an ISO 50001-aligned baseline before committing capital. The HOMER Pro model captures the plant's load profile, two existing gensets, the utility tariff, and a year of solar resource. The simulated as-is system becomes the EnB. Alternative designs — rooftop PV at three sizes, battery durations from one to four hours, and a demand-response option — are ranked by net present cost and annual emissions. The shortlist with quantified savings goes into the action plan.
HOMER Grid — commercial campus
Commercial campus quantifying action plans
A multi-building commercial campus on a complex time-of-use tariff with demand charges wants to quantify the improvement available from solar, storage, and load-shifting. HOMER Grid models the as-is tariff exposure as the baseline, then evaluates combinations of PV size, battery dispatch strategy, and demand-charge management. The output is a ranked set of action plans with annual savings, payback, and the projected EnPI shift for each — the inputs a compliance manager needs to justify the investment internally and document it for audit.
What HOMER produces as audit-supporting evidence
ISO 50001 audits and internal energy reviews need traceable records of how a design was chosen. HOMER simulations are reproducible from a stored input record, which means the artefacts below are not narrative claims — they regenerate from the model on demand.
- • Input record: resources, loads, equipment, tariffs, financial assumptions
- • Hour-by-hour dispatch trace for the baseline and each alternative
- • Annual EnPI values: kWh, $, CO2, renewable fraction
- • Sensitivity sweeps quantifying robustness against price and resource uncertainty
- • Ranked alternative-design list with savings against the baseline
- • Sized component lists supporting procurement specifications
Designing an ISO 50001-aligned project?
Tell our advisory team about your site, baseline goals, and the alternatives you need to compare. We will walk you through which HOMER product fits, what the planning-phase outputs will look like, and how they feed your energy management system documentation.
Frequently asked questions
Is HOMER certified under ISO 50001?
No. HOMER Pro and HOMER Grid are energy modelling tools used during the planning and design phase of ISO 50001-aligned projects. ISO 50001 certifies an organisation's energy management system, not a software product. HOMER supports the planning-phase activities that feed into certification — energy review, baseline construction, and action-plan evaluation.
Does HOMER cover monitoring and verification (M&V)?
No. HOMER is a design-phase simulation and optimisation tool, not a continuous monitoring or M&V platform. HOMER produces the baseline (EnB) and the predicted-performance figures that downstream monitoring and M&V workflows verify against, typically following ISO 50015 or IPMVP methods.
Which HOMER product fits which ISO 50001 project?
HOMER Pro fits off-grid, microgrid, remote, and industrial sites where the baseline question involves generation mix, storage sizing, and dispatch over long horizons. HOMER Grid fits behind-the-meter commercial and industrial sites where tariffs, demand charges, and utility-rate optimisation dominate the savings calculation.
Can HOMER outputs be used as audit evidence?
Yes, as supporting documentation for the planning phase. HOMER produces traceable scenario records, sensitivity analyses, sized component lists, dispatch traces, and quantified financial and emissions outputs. These artefacts document how a chosen design was selected from alternatives — core evidence for ISO 50001 Clauses 6.2 to 6.4.
How does HOMER relate to ISO 50004, 50006, and 50015?
ISO 50004 provides implementation guidance for ISO 50001 — HOMER supports the energy review and action-plan stages it describes. ISO 50006 covers EnB and EnPI methodology, and HOMER produces both. ISO 50015 covers M&V of energy performance — outside HOMER's scope, but HOMER provides the baseline against which 50015-aligned workflows verify.
Where can I read the ISO 50001 standard itself?
The official ISO page is at iso.org/iso-50001-energy-management.html. The full standard is available for purchase through ISO and national member bodies.