Finance Models for Commercial Solar & Battery Systems
Different Ways to Fund Solar Projects
One of the biggest questions for many businesses considering solar PV or battery storage is how to fund the installation.
While some companies choose to purchase systems outright, several alternative finance models are also available. These can reduce upfront costs and make commercial solar projects more accessible.
The right option will usually depend on factors such as:
- available capital
- cashflow priorities
- tax position
- ownership preferences
- long-term energy strategy
Onsite Power Purchase Agreements (PPAs)
An onsite Power Purchase Agreement (PPA) allows a third party to fund, install, own, and maintain the solar system on your premises.
Instead of purchasing the equipment, the business agrees to buy the electricity generated at an agreed price per kWh, which is often lower than standard grid electricity rates.
This model can offer:
- little or no upfront capital cost
- predictable electricity pricing
- reduced maintenance responsibility
- lower operational involvement
For businesses focused on preserving capital, PPAs can provide a relatively low-risk route into solar energy.
Private-Wire PPAs
A private-wire PPA works in a similar way but connects the business directly to a nearby renewable energy source using dedicated infrastructure.
This approach may be suitable where:
- roof space is limited
- the building is unsuitable for solar panels
- energy demand is particularly high
In some situations, private-wire arrangements can provide access to renewable electricity without requiring an on-site installation.
Asset Finance and Leasing
Some businesses prefer to retain ownership of the solar and battery system while spreading the installation cost over time.
Asset finance and leasing arrangements can help businesses:
- reduce upfront expenditure
- spread repayments
- retain long-term system ownership
- potentially benefit from available tax allowances
This route may appeal to organisations looking at solar as a long-term operational asset rather than simply an energy supply agreement.
Comparing the Different Approaches
Each finance model has different advantages and trade-offs.
In general:
- PPAs may suit businesses wanting minimal upfront investment and outsourced maintenance
- leasing or asset finance may suit businesses seeking ownership and long-term asset value
- outright purchase may provide the strongest long-term returns for some organisations
The most suitable structure will depend on the business itself rather than the solar system alone.
Consider the Bigger Financial Picture
Before choosing a finance model, businesses should consider:
- projected energy savings
- expected electricity price changes
- tax implications
- maintenance responsibilities
- contract length
- future operational flexibility
Financial and legal advice may also be worthwhile when reviewing larger commercial agreements.
Choosing the Right Structure for Your Business
Commercial solar and battery systems can be structured in several different ways, allowing businesses to match energy investment with operational priorities.
With careful planning, the right finance model can help reduce energy costs while supporting longer-term sustainability and business resilience goals.