Solar irrigation upgrades: Don't let certificate funding go unclaimed

Originally published: 10 August 2026. Scheme context checked: 21 October 2026.

Solar-powered irrigation equipment

Solar irrigation can be worth investigating for farms with significant pumping demand, but engineering savings and certificate eligibility are separate questions. In New South Wales, the Energy Savings Scheme (ESS) Rule makes a specific exception for solar photovoltaic systems used for solar irrigation pumping. That exception removes one general exclusion; it does not guarantee that a proposed diesel-to-solar conversion or any other pumping upgrade will create Energy Savings Certificates (ESCs).

Start with the pumping decision

Document the volume and timing of water needed, existing pump and motor performance, fuel and electricity use, operating hours, site constraints and the proposed system's duty. Compare practical options such as pump optimisation, controls, variable-speed drives, grid electricity, on-site solar and storage against the same required water service. Solar generation and pump demand may not coincide, and a different energy source can change maintenance, reliability and tariff costs. A project-specific engineering and financial assessment is more useful than a general payback promise.

Separate expected fuel savings, electricity purchases, on-site generation, maintenance effects and capital costs. State which amounts are measured, modelled or quoted. This helps the farm judge whether an upgrade makes sense before treating any incentive as certain.

What the NSW ESS Rule actually says

The current ESS Rule, effective 7 September 2026, generally excludes installation of a solar photovoltaic system from a recognised energy-saving activity, except where it is used for solar irrigation pumping. The exception is a possibility to assess, not an approval or a fixed certificate entitlement. The proposal still has to satisfy the relevant recognised-activity, eligible-fuel, site, calculation-method, nomination, implementation and evidence provisions. The rule recognises diesel savings and on-site renewable savings in its calculation framework, but the amount and method depend on the actual project.

The article previously listed diesel-to-solar, diesel-to-electric, solar-assisted pumping, variable-speed drives and controls as if each were covered. Those designs need separate, method-by-method review. Ask an Accredited Certificate Provider to identify the current rule clause and calculation method that could apply to the particular equipment and implementation date. The NSW certificate estimator is a screening tool only; it does not guarantee eligibility or a certificate quantity.

Plan evidence before committing to equipment

Record the dates of feasibility work, investment approval, purchase commitments, installation and commissioning. Identify the existing fuel and pumping baseline and the data needed to test savings under the proposed method. Some method requirements must be completed before implementation. Which ones apply depends on the chosen pathway; a blanket claim that every project needs an independent pre-installation M&V review would be misleading. The provider should confirm any nomination, baseline, professional review and evidence duties while the design can still be changed.

Being early does not itself make a project eligible, and being late is not automatically the only reason a claim fails. The activity, measured or modelled savings, location and records all matter. Where a scheme does not apply, the farm can still evaluate the technical upgrade on operating and financial merits.

Keep conditional certificate value visible

If an Accredited Certificate Provider identifies a plausible ESS pathway, request a written assessment stating the rule version, method, assumptions, evidence plan, indicative certificate quantity, price date, fees, ownership and proposed net customer proceeds. Keep engineering savings, scheme-recognised savings, created certificates and cash proceeds as separate quantities. Present the investment case with and without conditional certificate value, and do not promise a grant or rebate until its actual program terms are confirmed.

Northmore Gordon can help frame an energy assessment, measurement plan and certificate-pathway discussion. The government-schemes guide provides broader context. For a project discussion, contact the team with the site, equipment, recent energy records, expected implementation date and decision you need to make.

Why do Australian farmers often miss out on certificate funding when upgrading irrigation pumps to solar?

The engineering, scheme and evidence decisions are sometimes made at different times. A farm may assess pump performance or order equipment before anyone has checked the applicable certificate method, implementation date or required records. That can reduce options for a claim, but timing is not automatically the only obstacle: a project also needs an eligible activity, site, fuel-saving calculation and scheme evidence. In NSW, involve an Accredited Certificate Provider early enough to identify the precise ESS pathway and any pre-implementation duties, while assessing the pumping upgrade on its own technical merits.

Which Australian states run the best market-based certificate schemes for solar irrigation upgrades?

NSW has the Energy Savings Scheme (ESS), and Victoria has Victorian Energy Upgrades (VEU). They use different rules, calculations and certificate units; there is no universal 'best' scheme for solar irrigation. The current NSW ESS Rule makes a specific exception to its general solar-PV exclusion where the PV system is used for solar irrigation pumping, but that is not automatic eligibility. Other state and federal programs have their own scope and dates. Identify the farm's location, equipment, fuels and project stage, then check a specific current pathway rather than assuming all pumping upgrades earn certificates.

What pumping-related upgrades are covered under NSW's Energy Savings Scheme?

The NSW ESS Rule generally excludes solar PV installation from recognised energy-saving activities except where it is used for solar irrigation pumping. That exception allows a project-specific assessment; it does not confirm that every diesel-to-solar conversion will create ESCs. Diesel-to-electric pumping, solar-assisted systems, variable-speed drives and controls also need their own recognised-activity and calculation-method checks. An Accredited Certificate Provider should identify the applicable rule clause, eligible fuel, site, baseline, implementation date and evidence requirements before any certificate value is included in a quote.

What benefits can farmers capture by properly claiming certificate value from solar irrigation upgrades?

If a particular upgrade qualifies and certificates are created and sold under an agreed arrangement, the proceeds may help its economics. Neither eligibility nor price is automatic. Keep expected fuel and electricity savings, tariff changes, maintenance benefits, any grant and indicative certificate proceeds on separate lines. State the method, quantity assumption, price date, fees, ownership and net amount to the customer; compare the project with and without conditional support. This avoids presenting a shorter payback or stronger funding application as a guaranteed outcome.

How should a farmer structure the decision-making process for a solar irrigation upgrade to capture certificate funding?

Record separate dates for feasibility, investment approval, purchase commitments, installation and commissioning. Identify existing equipment, diesel and electricity use, pumping output, operating conditions and proposed changes. Ask an Accredited Certificate Provider to confirm the ESS activity and method, then plan any baseline, nomination, review and record-keeping steps required before implementation. Decisions can then be made with a clear technical case and an explicit statement of which certificate assumptions remain conditional.

What does a practical business case for a solar irrigation upgrade need to include to justify investment?

A useful investment case allows management to understand the decision and compare alternatives. State the business problem and operational result first. Keep benefit lines separate: energy reduction quantity and boundary, tariff or demand effect, maintenance benefit, and certificate proceeds (with eligibility, quantity, price date and timing clearly stated). Show certificate price and quantity assumptions separately in the analysis. Present the project with and without conditional support so management understands the full decision context. Use the same operating requirements and price assumptions when comparing options to competing uses of funds.

Why should measurement and verification be planned before a solar irrigation project is installed?

Measurement and verification can quantify the difference between a suitable baseline and post-upgrade energy use under an applicable ESS method, accounting for changes in pumping output and operating conditions. It should be planned early if the proposed method requires pre-implementation baseline data or professional review. These duties are method-specific; do not assume every solar irrigation project follows PIAM&V or that M&V alone establishes eligibility. Two bills may be inadequate where pumping hours, weather or water demand change, so agree the evidence boundary and records before installation.

What is the difference between a preliminary certificate estimate and a verified certificate result?

A preliminary estimate is useful for screening but should be labelled as such until its assumptions and evidence are checked. Keep engineering savings, scheme-recognised savings, created certificates and customer proceeds as separate quantities throughout. A verified result is an outcome established under an agreed measurement and verification approach and period. In NSW, PIAM&V is a specific ESS pathway; in Victoria, project-based activities have their own rules. An analysis prepared for one purpose should not be assumed to satisfy another scheme's requirements or a certificate claim later.

How can Northmore Gordon assist farmers to connect the engineering decision to the certificate funding decision?

Northmore Gordon can help investigate pumping energy use, compare technical upgrade options, develop a business case and plan measurement. Certificate eligibility, creation and commercial treatment depend on the specific current scheme, activity, provider role and contract. For a NSW ESS proposal, an Accredited Certificate Provider should identify the exact method and evidence duties before the design is finalised. A credible engagement separates engineering savings from a conditional certificate estimate and does not promise that every solar conversion qualifies.

What information should a farmer prepare before requesting a certificate eligibility assessment for a solar irrigation upgrade?

Provide the site and jurisdiction, existing and proposed pump/motor/solar equipment, capacities, pumping schedule and water-service requirement. Include diesel and electricity records, any metered baseline, project stage, likely implementation date, purchase commitments, prior incentives and the investment decision to be made. Gaps can be identified at an initial assessment. The next step is a technical and method-specific eligibility check with the relevant accredited provider; it may identify a pathway, rule out a claim or show what evidence must be collected before work proceeds.

Images on This Page