Solar-only
- Bill reduction is the primary goal
- Export rules are acceptable
- Backup power is not required
US SYSTEM COMPARISON
Solar-only vs. solar plus battery
Separate energy-production economics from backup-power and time-shifting goals.
| Decision | Solar-only | Solar + battery |
|---|---|---|
| Primary outcome | Generate electricity | Generate, store and dispatch electricity |
| Outage support | Normally none without special equipment | Defined backup loads when designed for it |
| Sizing basis | Roof, shade, annual usage | Solar plus backup loads and usable storage |
| Complexity | Array, inverter, interconnection | Adds storage controls and operating modes |
| Quote focus | Annual kWh assumptions | Usable kWh, power, backup panel and warranty |
Fit check
When each route deserves a closer look
Solar + battery
- Specific outage loads are defined
- Time-of-use shifting has value
- Battery replacement and warranty are modeled
Comparison questions
Keep the assumptions equal.
Is Solar-only always cheaper than Solar + battery?+
No. Equipment, existing infrastructure, local labor, permits, financing and operating cost must be compared with the same home assumptions.
How should I compare Solar-only and Solar + battery quotes?+
Give bidders the same home data and require itemized equipment, labor, electrical or fuel work, permits, commissioning, exclusions and warranties.