Ampinvt FT 5000W 48V Split Phase
A budget low-frequency split-phase inverter-charger for an off-grid cabin with a 240 V generator. It handles heavy loads, but documentation is thin and it cannot be stacked.
Amazon $645$645
3.1/5
For an off-grid home or cabin that wants 120/240 V split phase from a 48 V bank for the lowest price. Expect to accept a short warranty and no verified listing.
- 6,000 WContinuous
- 18,000 WSurge
- 120/240 V split-phaseOutput
- 81 WIdle draw
- NoUL listed
- 1 yearWarranty
Check price at Amazon$1,390Check price at SunGoldPower$1,355
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Cheapest 6 kW split-phase inverter-charger, about half the price of premium brands
- 18,000 W surge for 20 seconds starts well pumps and air conditioners
- Remote panel and generator auto-start included
- LiFePO4 charge setting works with lithium banks out of the box
Cons
- One-year warranty is short for a whole-home inverter
- No named-lab UL listing, which can block permitting
- Needs a 240 V source to charge
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 | LFP6K48V240VSP |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| AC output | 120/240 V split-phase |
| Continuous power | 6,000 W |
| Surge power | 18,000 W for 20 s |
| DC input range | 36 to 64 V |
| Idle draw | 81 W (1.7 A at 48 V) |
| Power-saving draw | 30 W |
| Peak efficiency | 88% |
| Connections | |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | Yes |
| Pass-through rating | 40 A |
| Charger | 60 A |
| Lithium charge profile | Yes |
| Parallel units | No |
| Control and build | |
| Remote | Included |
| App | No |
| Display | Yes |
| Safety listing | No |
| Design | Low-frequency (transformer) |
| Cooling | load-controlled fan |
| Dimensions | 25.6 x 9.1 x 7.5 in |
| Weight | 76.7 lb |
| Warranty | 1 year |
| Released | 2020-08 |
Alternatives in this size
AIMS Power 12000W 48V Split Phase ETL
For a large off-grid or backup home on 48 V that needs a listed, single-box 12 kW split-phase inverter-charger at a lower price than premium brands.
Amazon $4,733.99$4,733.99
AIMS Power 8000W 48V Split Phase ETL
For an off-grid or backup home on 48 V that needs a listed split-phase inverter-charger with heavy surge at a lower price than Outback or Schneider.
Amazon $4,611.27 AIMS Power $4,480$4,480
Compare
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