Fortress Power Solo 6.5K
For off-grid cabins, ADUs and backup systems that want 240 V and a large solar input from a US-supported brand. It costs a little more than the EG4 6000XP.
Current Connected $1,549 Wind & Sun $1,549$1,549
4.0/5
For homes that want Sol-Ark’s backup and grid-sell features on a smaller budget, usually on a critical-loads panel. Its high idle draw is the main trade-off.
- 10 kWOutput
- 48 VBattery
- 12,000 WSolar input
- 96 WIdle draw
- 10 yearsWarranty
Check price at Shop Solar Kits$3,849
Price checked October 23, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Sol-Ark’s whole-home features at a much lower price than the 15K
- 24 kW surge starts well pumps and AC compressors
- At 65 lb, one of the lightest split-phase hybrids to hang
- Ten-year warranty
Cons
- 96 W idle draw is high for its size
- 100 A grid passthrough suits a subpanel, not a full 200 A service
- New model, so there’s little field history yet
The Sol-Ark Limitless family
Every Sol-Ark Limitless model we rank, smallest first. Ratings compare each against its own output.
| Model | Output | Rating | Price |
|---|---|---|---|
| Sol-Ark Limitless 12K-2P-LL (this one) | 10 kW | 4.0/5 | $3,849 |
| Sol-Ark 15K-2P | 12 kW | 4.1/5 | $4,999 |
| Sol-Ark 18K-2P | 18 kW | 4.1/5 | $6,298 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its output. How we rank explains each one.
Specifications
| Model number | 12K-2P-LL |
|---|---|
| Output | |
| Output voltage | 120/240 V split-phase |
| Continuous output | 10,000 W |
| Surge | 24,000 W |
| Max efficiency | 97.6% |
| Idle draw | 96 W |
| Transfer time | 5 ms |
| Parallel units | Up to 12 units |
| Solar | |
| Max PV power | 12,000 W |
| Max PV voltage (Voc) | 500 V |
| MPPT range | 150 to 425 V |
| MPPT trackers | 3 |
| PV current per tracker | 32 A |
| Battery and grid | |
| Battery voltage | 48 V |
| Battery types | Lithium, lead-acid |
| Max charge current | 220 A |
| Battery communication | Yes |
| Grid sell-back | Yes |
| Generator input | Yes |
| UL 1741 | UL 1741 SB |
| Build | |
| App monitoring | Included |
| Enclosure | IP65 / NEMA 3R |
| Dimensions | 25.7 x 16.59 x 9.8 in |
| Weight | 65 lb |
| Warranty | 10 years |
| Released | 2026-06 |
Alternatives in this output
Fortress Power Envy 8K
For grid-tied homes with moderate backup needs that want an outdoor hybrid with export and US-based support.
Wind & Sun $3,735$3,735
SunGoldPower SGN7.6K1HB-48
A grid-tied hybrid sized for typical homes that want solar sell-back plus backup, with room to add units later.
SunGoldPower $2,450$2,450
Compare
Compare the Sol-Ark Limitless 12K-2P-LL with any other hybrid solar inverter →
More from Sol-Ark: every Sol-Ark product ranked.