Residential Solar & Battery Storage Proposal Template
Turnkey proposal scope for residential rooftop photovoltaic (PV) systems integrated with lithium-iron-phosphate (LFP) energy storage systems.
Complete Scope of Work
Copy or customize these verbatim specifications into your contractor proposal.
1. Engineering Design & Permitting
CAD layout and structural load calculations.
- Complete professional structural engineering stamp verifying roof rafter dead/live load capacity.
- Produce three-line electrical schematic for municipal electrical permitting and utility interconnection approval.
2. Rooftop PV Array & Rapid Shutdown
Racking, panels, and module-level power electronics.
- Install aluminum roof flashing and rafter-penetrating mounting stanchions with double-flashed waterproofing seals.
- Install high-efficiency Tier 1 monocrystalline solar panels with minimum 400W output per module.
- Install Module-Level Power Electronics (MLPE microinverters or DC optimizers) with automated NEC 690.12 rapid shutdown.
3. Hybrid Inverter & Energy Storage System (ESS)
Battery installation and backup load panel.
- Install wall-mounted lithium-iron-phosphate (LFP) battery storage system (10kWh–20kWh capacity).
- Install hybrid inverter and automated microgrid backup gateway for seamless islanding during grid blackouts.
- Wire dedicated critical backup loads subpanel (refrigeration, lighting, water pump, internet, medical devices).
4. Utility Interconnection, PTO & Warranties
Permission to operate and system monitoring.
- Coordinate municipal final electrical inspection and power company net metering meter swap.
- Commission cloud monitoring portal providing real-time production, battery state-of-charge, and home consumption analytics.
- 25-Year linear power warranty on solar modules.
- 10-Year manufacturer battery cycle warranty.
- 10-Year contractor roof penetration and workmanship warranty.
Standard Line-Item Material Allowances
Clear material specifications that protect against ambiguous scope arguments.
| Component / Assembly | Standard Specification | Unit / Allowance |
|---|---|---|
| Monocrystalline Solar Panels | 400W+ All-Black Tier-1 modules | Per Panel |
| LFP Battery Storage System | 10kWh to 15kWh usable capacity with smart BMS | Per Battery |
| Hybrid Inverter / Smart Gateway | UL 9540 certified automated islanding gateway | 1 Unit |
| Roof Mount Racking & Stanchions | Engineered aluminum rail with double-flashed lag anchors | Per Foot |
| Rapid Shutdown Initiator | NEC 690.12 compliant exterior emergency shutdown switch | 1 Unit |
Scope-Gap Protections: 3 Clauses to Include
These contractual gotchas account for 85% of change-order arguments on residential solar & battery storage proposal templates.
The Risk: Installing solar over shingles that have less than 10 years of life forces expensive removal and re-installation later.
Protective Clause: Includes formal roof inspection sign-off; warns homeowner if re-roofing is recommended prior to solar installation.
The Risk: Utility net metering policies (e.g. California NEM 3.0) drastically alter payback rates without battery storage.
Protective Clause: Specifies that utility rate structure assumptions are based on current tariffs at date of contract execution.
The Risk: NEC 705.12 restricts solar backfeed to 120% of busbar rating, often requiring main breaker derating or panel replacement.
Protective Clause: Specifies that main panel busbar derating or supply-side tap is included per code requirements.
Governing Building Codes & Standards
Frequently Asked Questions
What tax incentives apply to residential solar and battery installations?▾
Under the Federal Residential Clean Energy Credit (Section 25D), homeowners can deduct 30% of total solar and battery storage installation costs with no upper dollar limit.
Does a solar system provide power during a grid blackout?▾
Grid-tied solar without a battery shuts down during blackouts to protect utility line workers. Only solar systems integrated with an automated islanding gateway and battery storage supply continuous backup power during grid failures.
Related Electrical Proposal Scopes
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