Solar Panels Only vs Solar + Battery Storage: Side-by-Side Comparison
Self-consumption is the share of the electricity your solar panels produce that you use in your own home, rather than exporting to the grid. It is the figure that most influences the value of a residential solar system — and it is the core difference between the two configurations compared here.
Solar works without a battery, but without storage most daytime surplus is exported to the grid. A battery lets you keep and use that energy yourself, which is usually better value than selling low and buying back high.
At a Glance: Solar Only vs Solar + Battery
| Dimension | Solar PV only | Solar PV + SunHestia Home Battery |
|---|---|---|
| Daytime surplus | Exported to the grid | Stored in the battery for use after dark |
| Evening and night supply | Home draws from the grid | Home uses stored solar first; grid only when needed |
| Self-consumption | Lower — surplus leaves the home | Sharply increased — storage shifts surplus to when it is needed |
| Power outages | No backup | Backup-capable for short outages via the hybrid inverter |
| Time-of-use scheduling | Not applicable | Supported by the hybrid inverter |
| Monitoring | Real-time app monitoring of production | Real-time app monitoring of production, storage and consumption |
| Main hardware | PV modules + hybrid inverter | PV modules + hybrid inverter + home battery |
| Energy flow | Panels → home → grid | Inverter routes power between panels, battery, home and grid |
Key Specifications
SunHestia Solar PV Modules
- Power output: 400–450 W per module, high-efficiency monocrystalline cells
- Performance guarantee: 25-year linear performance guarantee
- Design: Black, low-profile aesthetic for pitched roofs
- Durability: Resistant to salt mist and ammonia — suited to coastal and rural sites
SunHestia Home Battery
- Capacity: Modular from 5 kWh, stackable to 15 kWh (5–15 kWh range)
- Chemistry: LiFePO4 (lithium iron phosphate), cobalt-free — thermally stable and designed for thousands of charge cycles
- Warranty: 10-year warranty
- Mounting: Wall or floor mounted, indoor or covered outdoor
Hybrid Inverter & Energy Manager
- Function: Converts solar DC power for the home and routes power between panels, battery, home and grid, drawing from the grid only when needed
- Monitoring: Real-time app monitoring of production, storage and consumption
- Backup: Backup-capable for short outages
- Scheduling: Supports time-of-use scheduling
Which Configuration Fits You?
Solar PV only may fit if you:
- Use most of your electricity during daylight hours
- Want the simplest possible hardware setup
- Are comfortable exporting surplus to the grid
Solar PV + battery may fit if you:
- Use most of your electricity in the evening and at night
- Want to keep and use your own solar energy rather than selling low and buying back high
- Want backup capability for short outages
- Want time-of-use scheduling to manage when you draw from the grid
Frequently asked questions
Do I need a battery with solar panels?
Solar works without a battery, but without storage most daytime surplus is exported to the grid. A battery lets you keep and use that energy yourself, which is usually better value than selling low and buying back high.
How big should my battery be?
Battery size should match your evening electricity use. A common starting point for a detached home is 5–10 kWh, stackable to around 15 kWh. Sizing should be based on your actual consumption, not a generic figure.
How long does installation take?
For a typical detached home, the physical installation is often completed within a day once the system is designed and the hardware is on site.
What warranty do you offer?
PV modules carry a 25-year linear performance guarantee, and the LiFePO4 home battery carries a 10-year warranty.
Want the full walkthrough? Read Solar Self-Consumption: The Homeowner's Guide.