For installers
All-in-one vs a separate inverter and battery.
Both approaches store energy and provide backup. The difference is in the job: parts to source, connections to make, warranties to track and time on site. Here is the honest comparison.
| All-in-one (Sunpura) | Separate components | |
|---|---|---|
| Components to source | One integrated unit | Inverter + battery + BMS, often different brands |
| Wiring and connections | Fewer connections, factory-matched | More connections to make and test |
| Warranty | One warranty on the unit | Separate warranties per component |
| Commissioning | Faster, fewer settings to reconcile | Match and configure separate devices |
| Footprint | Compact stackable unit | Multiple boxes and mounts |
| Fault finding | One unit, one support line | Diagnose which component is at fault |
| Expansion | Add matched battery modules | Check compatibility across brands |
This compares approaches, not specific competitor products. We do not publish prices; the balance depends on the job and the customer's existing equipment.
The short version
For a new system, an all-in-one usually wins on install time, simplicity and single-warranty peace of mind. For a home that already has a capable inverter, an AC-coupled Sunpura battery adds storage without replacing what works. Either way, it is one supplier and one support line.
Common questions
Is an all-in-one always cheaper than separate components?
Not always on the sticker price, but the total cost of the job often favours all-in-one once you count the separate inverter, wiring labour, commissioning time and the risk of matching components. Where a customer already owns a compatible inverter, an AC-coupled battery can be the better value.
When do separate components still make sense?
When there is an existing, capable inverter that the customer wants to keep, or when a very specific, unusual configuration is needed. For that first case, Sunpura offers AC-coupled models that add storage to the existing inverter.
Can I still expand an all-in-one later?
Yes. The stackable Sunpura models add battery modules up to 24 kWh, and parallel up to 144 kWh, using matched modules from the same family.
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