If you are an operations manager or business owner leasing space from JTC, you have probably heard that “solar is mandatory” for some industrial buildings. But the reality is more nuanced. Whether your site must install solar depends on specific thresholds in your lease and your building’s rooftop, not just on a blanket rule.

This article breaks down the JTC solar rules for tenants in simple terms. It explains when solar is truly mandatory, when it is voluntary, and what options you have as a lessee or tenant. It also clarifies the common confusion between “lessee” and “tenant” obligations, so you can approach your next lease renewal, expansion, or retrofit with confidence.

TL;DR - key takeaways to JTC solar rules as a tenant or lessee

• JTC requires mandatory solar deployment only when both of these conditions are met: at least 800 sqm of contiguous rooftop area and at least 15 years remaining on the lease.
• If your site does not meet both thresholds, solar is voluntary, but you still need JTC’s written consent before any rooftop works begin.
• The obligation runs with the lease, so a new tenant taking over a qualifying building inherits the mandatory solar requirement.
• All rooftop works on JTC‑leased premises require JTC written consent, regardless of whether deployment is mandatory or voluntary.
• Tenants can choose from several commercial models, including direct ownership, solar leasing, PPA, or rooftop licensing, depending on capex appetite and lease structure.
• Failing to obtain JTC consent before starting work can constitute a breach of the lease, even for small or voluntary systems.

The core rule: when solar is mandatory for JTC tenants

JTC’s mandatory solar requirement applies only when a building meets two key criteria. irst, the site must have at least 800 square metres of contiguous, unobstructed rooftop area. This excludes zones blocked by plant rooms, cooling towers, parapet walls, and other technical constraints. Second, the lease must have 15 years or more remaining at the time of assessment.

If both conditions are satisfied, the lessee is expected to deploy solar as part of the building’s compliance pathway. This is not a suggestion; it is a condition tied to the lease and, in many cases, to lease renewal or building plan approvals.

When solar is voluntary but still regulated

If your site falls short on either threshold, for example, you have only 600 sqm of usable roof or 10 years left on the lease, solar becomes voluntary. That does not mean “no rules apply.” JTC still requires written consent for any additions and alterations to the land or land‑based facilities, which includes rooftop solar.

In practice, this means you cannot simply engage a contractor and start installation. You must apply for consent via the JTC Tenant Portal, submit your proposed system specifications and structural assessments, and wait for written approval before any work begins. This applies whether you own the system, lease it, or host a third‑party developer under a PPA.

Lessee vs tenant: where the confusion comes from

A lot of the confusion comes from the terms “lessee” and “tenant.” In JTC’s framework, the lessee is the party named on the head lease with JTC. The tenant may be a sub‑tenant or occupier under the lessee. The mandatory solar obligation generally attaches to the lessee, because the requirement is tied to the lease and the building.

However, in many industrial parks, the party managing operations, capex, and facility upgrades is the occupying company, which may think of itself as the “tenant.” If you are an operations manager, you need to clarify internally whether your company is the lessee or a sub‑tenant, and who is responsible for solar compliance in your lease documents.

Your options if solar is mandatory

If your site meets the 800 sqm and 15‑year thresholds, you still have choices on how to implement solar. Common models include direct ownership, where you fund and own the system; solar leasing, where you pay a fixed rental for the rooftop array; and power purchase agreements (PPA), where a third party owns the system and you buy the electricity at a pre‑agreed tariff.

Each model has different implications for capex, balance sheet treatment, and operational control. Direct ownership usually delivers the highest long‑term savings but requires upfront investment. Leasing and PPA models reduce capex and shift performance risk to the developer, which can be attractive if you prefer predictable operating costs.

Your options if solar is voluntary

If your site does not meet the mandatory thresholds, you can still pursue solar as a voluntary deployment. This is often driven by cost savings, ESG targets, or tenant expectations. The same commercial models apply: ownership, leasing, or PPA. The main difference is that you are not under a regulatory obligation, so you can time the project around your business priorities.

Even in voluntary cases, it is important to treat solar as a facility upgrade, not an afterthought. Early coordination with JTC, your PE, and your solar partner will help you avoid redesigns, approval delays, or conflicts with other rooftop equipment.

Regardless of mandatory or voluntary status, the approval process is non‑negotiable. You must apply for written consent via the JTC Tenant Portal before any rooftop works begin. This includes design surveys, structural assessments, and pilot installations. Your submission typically includes system specifications, structural load calculations, and the LEW’s plan.

After installation, you must provide JTC with as‑built drawings and the LEW’s sign‑off, and notify JTC of system commissioning and SP Services registration. Skipping these steps can put you in breach of your lease, even if the system itself is technically sound.

FAQ - JTC solar requirements for tenants

Q1: Am I obligated to install solar as a JTC tenant?
You are obligated only if your building has at least 800 sqm of contiguous rooftop area and at least 15 years remaining on the lease. If either condition is not met, solar is voluntary.

Q2: Does the solar obligation apply to me if I am a sub‑tenant?
The obligation generally attaches to the lessee on the head lease. If you are a sub‑tenant, you need to check your internal lease and clarify who is responsible for compliance and capex.

Q3: Can I install solar voluntarily if my site does not meet the thresholds?
Yes. Voluntary solar is allowed and encouraged, but you still need JTC’s written consent before any rooftop works begin.

Q4: What happens if I start work without JTC consent?
Proceeding without JTC’s written approval can constitute a breach of your lease, even for small or voluntary systems, and may lead to enforcement action.

Q5: What commercial models are available for JTC tenants?
Common models include direct ownership, solar leasing, PPA, and rooftop licensing. The best choice depends on your capex appetite, lease structure, and long‑term energy strategy.

If you are a JTC tenant or lessee evaluating solar, the first step is to confirm whether your site meets the mandatory thresholds and to map out your approval pathway early. That is how you avoid last‑minute surprises during lease renewal, expansion, or retrofit planning.

Eigen Energy works with industrial tenants and lessees to assess feasibility, navigate JTC consent, and design solar solutions that fit your operations and commercial model. If you want a no‑obligation review of your site’s solar options under JTC rules, reach out to our team for a structured feasibility discussion.

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