Samlex EVO-3012
#25 in Inverter-chargersFull review
For larger RVs and boats that want a listed inverter-charger with fast lithium charging and generator support.
Amazon $2,046$2,046
3.3/5
The 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.
- 4,000 WContinuous
- 12,000 WSurge
- NoUL listed
- 1 yearWarranty
Check price at SunGoldPower$1,020
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 12,000 W surge for 20 seconds starts large motors
- Built-in 120 A charger and transfer switch
- LiFePO4 charging preset
- LCD remote included
Cons
- A 4000 W load pulls over 330 A from a 12 V battery
- Very heavy at about 77 lb
- No UL or ETL listing
The SunGoldPower LFP 12V family
Every SunGoldPower LFP 12V model we rank, smallest first. Ratings compare each against its own size.
| Model | Continuous | Rating | Price |
|---|---|---|---|
| SunGoldPower 2000W LF Inverter Charger | 2,000 W | 3.1/5 | $730 |
| SunGoldPower 3000W LF Inverter Charger | 3,000 W | 3.2/5 | $859 |
| SunGoldPower 4000W LF Inverter Charger (this one) | 4,000 W | 3.3/5 | $1,020 |
| SunGoldPower 4000W LF Split-Phase 12V | 4,000 W | 3.0/5 | $1,040 |
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 | LFP4K12V120VSG |
|---|---|
| Output | |
| Type | Pure sine wave inverter-charger |
| Continuous power | 4,000 W |
| Surge power | 12,000 W for 20 s |
| DC input range | 10 to 16 V |
| Power-saving draw | 2.1 A |
| Peak efficiency | 88% |
| Connections | |
| Hardwire terminal | Yes |
| Transfer switch | Yes |
| Charger | 120 A |
| Lithium charge profile | Yes |
| Control and build | |
| Remote | Included |
| App | No |
| Display | No |
| Safety listing | No |
| Cooling | load-controlled fan |
| Dimensions | 23.5 x 9.5 x 7.8 in |
| Weight | 77.2 lb |
| Warranty | 1 year |
Alternatives in this size
Go Power! GP-IC-3000-12
#26 in Inverter-chargersFull review
For 50 A RVs that want an inverter-charger able to pass both shore power legs through.
Amazon $2,040.98$2,040.98
ECO-WORTHY 3000W Inverter Charger
#28 in Inverter-chargersFull review
A budget 3000 W inverter-charger for off-grid cabins and DIY RV builds that need a big charger. Specs come only from the Amazon listing.
Amazon $499.99$499.99
Compare
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