OutBack Radian GS8048A
For an off-grid home or whole-house backup that needs 240 V loads from one inverter. A proven heavy transformer design with grid and generator inputs, at a high price.
Amazon $4,460$4,460
3.6/5
A low-cost split-phase inverter-charger for an off-grid home that may add units later. Strong charger and parallel support, but no safety listing.
- 6,000 WContinuous
- 18,000 WSurge
- 120/240 V split-phaseOutput
- NoUL listed
- 2 yearsWarranty
Check price at Amazon$685
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Up to six units in parallel, so the system can grow to 36 kW
- Fast 80 A charger refills a big bank from a generator
- Wi-Fi app built in
- Low-frequency transformer for hard motor starts
Cons
- No published idle draw or efficiency curve
- No safety listing
- Needs 240 V AC input to charge or pass power through
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | GP-6000W48V |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| AC output | 120/240 V split-phase |
| Continuous power | 6,000 W |
| Surge power | 18,000 W |
| Peak efficiency | 90% |
| Connections | |
| Transfer switch | Yes |
| Charger | 80 A |
| Lithium charge profile | Yes |
| Parallel units | Yes |
| Control and build | |
| App | Built in |
| Display | Yes |
| Safety listing | No |
| Design | Low-frequency (transformer) |
| Cooling | fan |
| Weight | 70.5 lb |
| Warranty | 2 years |
Alternatives in this size
Magnum MS4448PAE
For permitted 48 V off-grid or backup homes that need listed split-phase power and room to stack more units later.
Mr. Solar $2,239.20$2,239.20
Samlex EVO-4248SP
For a 48 V off-grid home or backup system that needs 120/240 V from a single listed inverter-charger.
Battery Stuff $2,228.90 Don Rowe $2,228.90$2,228.90
Compare
Compare the Ampinvt GP 6000W 48V Split Phase with any other 48V inverter →
More from Ampinvt: every Ampinvt product ranked.