SunGoldPower 18000W 48V Split Phase
For a large off-grid home on 48 V that needs 18 kW of 120/240 V from one box on a budget. The short warranty and unverified listing are the trade-offs.
Amazon $3,950$3,950
The SunGoldPower 18000W 48V Split Phase is the better 48V inverter overall, rated 2.8 to 2.6. The SunGoldPower 18000W 48V Split Phase leads on efficiency and features. The Sigineer HP18048D costs $351 less ($3,599 vs $3,950).
Sigineer HP18048D
For large unpermitted off-grid homes that want 18 kW of split-phase power from one 48 V box, accepting high idle draw.
Sigineer $3,599$3,599
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the SunGoldPower 18000W 48V Split Phase for efficiency (88% peak efficiency (maker rating) vs 85% peak efficiency (maker rating)) and features (remote included, lithium charge profile, 120/240 V split-phase, hardwire terminal, display; no app vs optional remote, lithium charge profile, 120/240 V split-phase, hardwire terminal; no app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every split-phase inverter-chargers 48V inverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | SunGoldPower 18000W 48V Split Phase | Sigineer HP18048D |
|---|---|---|
| Overall rating | 2.8/5 | 2.6/5 |
| Value 30% | 74 $0.22 per continuous watt | 78 $0.20 per continuous watt |
| Idle draw 15% | 0 270 W idle with nothing plugged in | 0 350 W idle with nothing plugged in |
| Safety listing 15% | 0 no UL 458 or UL 1741 listing stated | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
| Features 15% | 80 remote included, lithium charge profile, 120/240 V split-phase, hardwire terminal, display; no app | 60 optional remote, lithium charge profile, 120/240 V split-phase, hardwire terminal; no app |
| Efficiency 10% | 33 88% peak efficiency (maker rating) | 0 85% peak efficiency (maker rating) |
Specifications
| SunGoldPower 18000W 48V Split Phase | Sigineer HP18048D | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter-charger | Pure sine wave inverter-charger |
| AC output | 120/240 V split-phase | 120/240 V split-phase |
| Continuous power | 18,000 W | 18,000 W |
| Surge power | 54,000 W for 20 s | 54,000 W for 20 s |
| DC input range | 40 to 64 V | 40 to 64 V |
| Idle draw | 270 W (5.6 A at 48 V) | 350 W (7.3 A at 48 V) |
| Power-saving draw | 50 W | 45 W |
| Peak efficiency | 88% | 85% |
| Connections | ||
| AC outlets | 0 | 0 |
| GFCI outlets | No | No |
| Hardwire terminal | Yes | Yes |
| USB ports | None | None |
| Transfer switch | Yes | Yes |
| Pass-through rating | 100 A | - |
| Charger | 95 A | 60 A |
| Lithium charge profile | Yes | Yes |
| Parallel units | No | No |
| Control and build | ||
| Remote | Included | Optional extra |
| App | No | No |
| Display | Yes | No |
| Safety listing | No | No |
| Design | Low-frequency (transformer) | Low-frequency (transformer) |
| Cooling | load-controlled fan | fan |
| Dimensions | 706 x 415 x 230 mm (27.8 x 16.3 x 9.1 in) | 32 x 16.3 x 8 in (806 x 415 x 212 mm) |
| Weight | 177.5 lb | 220 lb |
| Warranty | 1 year | 1 year |