Path-Q Solar
How should a landlord compare centralized battery backup with separate tenant-level systems in a multi-unit property?
Answer
Compare the options based on how backup capacity, costs, controls, and responsibilities will be allocated. Centralized backup can use capacity and maintenance more efficiently but requires clear rules for shared priorities and metering; separate tenant systems provide more autonomy but may duplicate equipment and create uneven reliability or maintenance.
Key points
- Centralized systems are generally easier to coordinate for common loads and whole-building controls.
- Tenant-level systems can let occupants choose their own priorities and may limit disputes about shared capacity.
- Compare installation complexity, available electrical capacity, emergency access, monitoring, maintenance, and replacement responsibilities.
- Determine whether the property can legally and technically allocate generation or stored energy among multiple units.
- Model partial-outage scenarios rather than comparing only total battery capacity.
What it depends on
- Building electrical architecture and meter arrangement
- Critical common-area and tenant loads
- Battery and inverter sizing
- Ownership, cost allocation, and maintenance model
- Interconnection, fire-safety, and building requirements
Risks and trade-offs
- Centralized storage can create a single point of failure and disputes over priority.
- Separate systems can increase upfront cost, space use, monitoring burden, and inconsistent maintenance.
- A nominal capacity comparison may be misleading if usable capacity, inverter output, or load controls differ.
- Tenant turnover can complicate access, account ownership, and equipment responsibility.
Information you may need
- Electrical drawings and meter configuration
- Load inventory and outage priorities by unit and common area
- Proposed system capacities and control architecture
- Lifecycle cost and maintenance estimates
- Required approvals and insurance conditions
Your next step
What to do next
Request comparable designs from an experienced integrator showing capacity allocation, outage performance, controls, maintenance, and ten-year ownership costs.
Path-Q
Find the right next step
Answer a few questions and we’ll narrow your options.
Some details may depend on your location, installer, utility, incentives, regulations, or specific property.
SQ03046