Path-Q Solar
How should solar costs be shared in a condominium building?
Answer
Costs should be allocated through a written agreement that matches the system's ownership, use, maintenance obligations, and expected benefits. Common approaches include allocating costs by unit ownership percentage, by measured electricity use, or among only the units receiving the system's benefits.
Key points
- Separate installation, financing, insurance, monitoring, repairs, roof work, replacement, and removal costs.
- Define how electricity, bill credits, renewable certificates, or other benefits are assigned.
- Consider whether the system serves common loads, individual units, or both.
- Use transparent records and a process for owners who join later, sell, or opt out.
What it depends on
- Condominium governing documents and applicable condominium law
- System ownership and electrical configuration
- How generation is measured and credited
- Roof, insurance, reserve, and maintenance responsibilities
Risks and trade-offs
- Equal sharing may be simple but may not reflect differing unit benefits.
- Use-based allocation can be fairer but requires metering, administration, and ongoing data management.
- An unclear agreement can create disputes when production is lower than expected or the roof needs replacement.
Information you may need
- Building load profile and proposed system size
- Unit ownership percentages and expected electricity use
- Interconnection and metering design
- Association budget, reserve plan, insurance, and approval requirements
Your next step
What to do next
Compare at least two allocation models with a qualified engineer and the association's legal or governance adviser, then document ownership, benefits, costs, and exit obligations before approval.
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Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
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