The EDECOA 3500W Pure Sine (12V) rates 3.7 among over 2,000 W 12V inverters; the SunGoldPower 4000W LF Inverter Charger rates 3.3 among inverter-chargers ones. The EDECOA 3500W Pure Sine (12V) costs $660 less ($360 vs $1,020).
A big, low-idle inverter for large off-grid banks at a modest price. The very short surge and lack of a listing count against it for air conditioners and permanent installs.
Amazon $379.99 EDECOA $360The largest 12 V model in SunGoldPower’s low-frequency line, for cabins that need surge capacity. At this size a 24 V or 48 V system is usually the better choice.
SunGoldPower $1,020Prices 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.
These two sit in different size classes (over 2,000 W and inverter-chargers), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | EDECOA 3500W Pure Sine (12V) | SunGoldPower 4000W LF Inverter Charger |
|---|---|---|
| Overall rating | 3.7/5 | 3.3/5 |
| Value 30% | 93 $0.10 per continuous watt | 99 $0.26 per continuous watt |
| Idle draw 15% | 100 0.5 A idle (about 6 W) with nothing plugged in | 50 idle draw not published (neutral score used) |
| Safety listing 15% | 0 no UL 458 or UL 1741 listing stated | 0 no UL 458 or UL 1741 listing stated |
| Warranty 15% | 50 warranty not published (neutral score used) | 0 1-year warranty |
| Features 15% | 50 remote included, hardwire terminal, display; no app | 65 remote included, lithium charge profile, hardwire terminal; no app |
| Efficiency 10% | 50 efficiency not published (neutral score used) | 33 88% peak efficiency (maker rating) |
| EDECOA 3500W Pure Sine (12V) | SunGoldPower 4000W LF Inverter Charger | |
|---|---|---|
| Output | ||
| Type | Pure sine wave inverter | Pure sine wave inverter-charger |
| Continuous power | 3,500 W | 4,000 W |
| Surge power | 7,000 W for 100 ms | 12,000 W for 20 s |
| DC input range | 9.5 to 15 V | 10 to 16 V |
| Idle draw | 0.5 A (6 W) | - |
| Power-saving draw | - | 2.1 A |
| Peak efficiency | - | 88% |
| Connections | ||
| AC outlets | 4 | - |
| Hardwire terminal | Yes | Yes |
| USB ports | None | - |
| Transfer switch | No | Yes |
| Charger | - | 120 A |
| Lithium charge profile | - | Yes |
| Parallel units | No | - |
| Control and build | ||
| Remote | Included | Included |
| App | No | No |
| Display | Yes | No |
| Safety listing | No | No |
| Cooling | load-controlled fan | load-controlled fan |
| Dimensions | 32 x 23 x 18 cm | 23.5 x 9.5 x 7.8 in |
| Weight | 16.1 lb | 77.2 lb |
| Warranty | - | 1 year |
