The Contracts Every Solar Energy Company Needs (2026 Checklist)

Why solar is a contract-heavy business A solar project is a long chain of promises stretched across twenty-five years or more. You secure land, buy panels and inverters, build the system, connect it to the grid, sell the power, and keep it running for decades. A single weak link in that chain, a land lease that can be revoked, a supply contract with no warranty, an offtake agreement with a shaky buyer, can sink the economics of a plant. This is a practical checklist of the agreements a solar energy company actually needs across development, build and operation. It is general information, not legal advice, so confirm the specifics for your jurisdiction and project type with qualified counsel. ## The core contracts every solar company should hold Land lease or site control agreement. The right to use the ground, whether a lease, an easement or a rooftop licence. For a project that must run for decades, the term must outlast the plant, with clear rights of access, restrictions on the owner, and what happens at decommissioning. Weak site control is the first thing a lender will reject. Power purchase agreement (PPA). The contract to sell the electricity, usually the single most important commercial document. It sets the price per unit, the term, the volume commitments, the credit of the offtaker, and what happens if the buyer defaults or the plant underperforms. The tariff and the offtaker's creditworthiness drive the whole financial model. EPC (engineering, procurement and construction) contract. The agreement with the contractor who designs and builds the plant. Watch the completion date, the performance guarantees, the liquidated damages for delay and underperformance, the defects-liability period, and the warranties. This is where construction risk is allocated. Equipment supply contracts. Panels, inverters, mounting structures and transformers. The long product warranties and performance guarantees, especially the panel degradation warranty, are central because they underpin twenty-five-year output assumptions. Operations and maintenance (O&M) agreement. The contract to keep the plant running after construction: scheduled maintenance, response times for faults, availability guarantees and spare-parts terms. Availability guarantees directly protect revenue. Interconnection and grid-connection agreement. The agreement with the utility or grid operator to connect and export power, covering the connection point, technical standards, metering and any curtailment rules. Without it the plant cannot earn. Financing and security documents. Loan agreements, security over the assets and the project contracts, and often a direct agreement letting lenders step in if the developer defaults. Lenders drive many of the terms in every other contract. ## The contracts people forget until it is too late Permits, licences and regulatory approvals. Not contracts in themselves, but conditions that flow into your contracts: environmental clearances, generation licences and local permits, each with obligations that outlast the approval. Insurance policies. Construction all-risk during the build, then operational property, business-interruption and liability cover. Lenders and offtakers usually require specified cover. Warranty and performance-guarantee assignments. When ownership changes or the project is financed, the panel, inverter and EPC warranties must be assignable so the value follows the asset. Decommissioning and site-restoration agreements. Many jurisdictions and landowners now require a plan and sometimes a bond for removing the plant at end of life. Rooftop and net-metering agreements (for distributed solar). For commercial and residential rooftop businesses, the host agreement, the net-metering or feed-in arrangement, and clear customer terms are the equivalents of a land lease and a PPA at smaller scale. ## How to run this checklist in practice First, build one inventory of every agreement per project with the counterparty, the type, start and end dates, the key milestone and notice windows, and a named owner. Listing them surfaces the gaps that worry lenders: the warranty that is not assignable, the land term that is shorter than the PPA, the interconnection condition nobody tracked. Second, keep a milestone and obligation calendar. PPA price-escalation dates, warranty expiry, O&M availability reporting, permit renewals and loan covenants are the obligations that cost real money when missed. Put every date on a shared calendar with reminders well ahead and a named owner. Third, keep the contract stack consistent across projects. A developer builds many plants on similar structures, and a clean, versioned template set makes due diligence and refinancing far faster. ## The clauses worth reading closely Across the PPA, EPC and supply contracts, a few clauses carry most of the risk: the tariff and escalation clause in the PPA, which drives revenue; the performance-guarantee and liquidated-damages clauses in the EPC, which decide who pays for a slow or underperforming build; the warranty and degradation clauses in supply contracts, which underpin long-term output; the availability guarantee in the O&M agreement, which protects running revenue; and the termination and step-in clauses, which decide what happens to lenders and offtakers if something fails. Reading these consistently catches most of what hurts a solar business. ## Keeping it all in one place The real problem for a solar company is not any single contract, it is that land leases, PPAs, EPC and supply agreements, O&M deals and finance documents are spread across projects, folders and advisers, the milestone and warranty dates inside them are invisible until missed, and nobody is sure which version survived the last amendment. Drafting an agreement, reviewing it for risky clauses, tracking milestones and obligations, and keeping version history are all the same body of work, and far easier when they live together. That single-workspace idea is what Adira is built around for business contracts: draft, understand, edit, track and govern an agreement in one place, tuned to how your company works and built on frontier AI. Whatever you use, the direction is the same: contracts you can trust are the ones that stay in one place, in step, with their deadlines in view.