SunGoldPower 15000W 48V Split Phase
For a large off-grid home on 48 V that needs 15 kW of 120/240 V from one box on a budget. The short warranty and unverified listing are the trade-offs.
Amazon $3,463.43 SunGoldPower $3,350$3,350
2.6/5
For large unpermitted off-grid homes that want 18 kW of split-phase power from one 48 V box, accepting high idle draw.
- 18,000 WContinuous
- 54,000 WSurge
- 120/240 V split-phaseOutput
- 350 WIdle draw
- NoUL listed
- 1 yearWarranty
Check price at Sigineer$3,599
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Holds 54,000 W for 20 seconds, enough to start well pumps and compressors
- Transformer-based design shrugs off motor and inductive loads
- Lithium setting plus adjustable charge current
- Huge capacity from one box for a whole off-grid home
Cons
- High idle draw (350 W) unless power saver is on
- No UL listing, so it may not pass a permitted install
- One-year warranty
The Sigineer HP 48V family
Every Sigineer HP 48V model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| Sigineer HP15048D | 15,000 W | 2.8/5 | $3,099 |
| Sigineer HP18048D (this one) | 18,000 W | 2.6/5 | $3,599 |
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 | HP18048D |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| AC output | 120/240 V split-phase |
| Continuous power | 18,000 W |
| Surge power | 54,000 W for 20 s |
| DC input range | 40 to 64 V |
| Idle draw | 350 W (7.3 A at 48 V) |
| Power-saving draw | 45 W |
| Peak efficiency | 85% |
| Connections | |
| AC outlets | 0 |
| GFCI outlets | No |
| Hardwire terminal | Yes |
| USB ports | None |
| Transfer switch | Yes |
| Charger | 60 A |
| Lithium charge profile | Yes |
| Parallel units | No |
| Control and build | |
| Remote | Optional extra |
| App | No |
| Display | No |
| Safety listing | No |
| Design | Low-frequency (transformer) |
| Cooling | fan |
| Dimensions | 32 x 16.3 x 8 in (806 x 415 x 212 mm) |
| Weight | 220 lb |
| Warranty | 1 year |
Alternatives in this size
AIMS Power 10000W 48V Split Phase
For a big off-grid home that needs 10 kW of split phase from 48 V and doesn’t need a UL listing. If the install must be inspected, the listed 12 kW costs little more.
Amazon AIMS Power $4,160$4,160
Schneider Conext SW 4048 Discontinued
For a small off-grid cabin or backup system that needs some 240 V and won’t grow past 3.8 kW. A bargain at clearance prices, but it’s discontinued and can’t be expanded.
Northern Arizona Wind & Sun $350$350
Compare
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