The ultimate solution for off-grid or big gains systems


Grid-tie, off-grid or hybrid with a wide variety of batteries


Pre-wired, all-in-one system, simple to install and use

Sol-Ark 12k: The ultimate off-grid inverter

At Practical Preppers®, we’ve been designing and installing solar systems for many years. Ever since Sol-Ark began releasing inverters, we have exclusively used and recommended them for solar installations. Here, we have outlined the prominent features of the new Sol-Ark 12k and why its a great solution for our off-grid customers. 

sol-ark 12k


The Sol-Ark 12k can take up to 16kW of PV power and outputs 12kW of continuous power. This solar inverter is a combined output, so the power is distributed simultaneously to your battery bank, AC loads, and to the grid for sell-back. Up to 9.6 kW can be directed to the grid/AC loads, while the remaining power is used to charge batteries that you may have. 

Additionally, the Sol-Ark 12k has gains capabilities, up to 6 systems (72kw)! Providing you with true 208 power with 3 inverters. This is great news for people interested in commercial solar. 

Most residences typically do not need the amount of power the 12k can provide, but it is perfect for off-grid and big gains systems.

What the Sol-Ark 12k has in power, it does NOT lack in efficiency. The Sol-Ark 12k has 96% on grid PV to AC efficiency! This is top-rated efficiency that saves you money in the long run. See our comparison charts below


Perhaps our favorite characteristic of Sol-Ark inverters is that is an all-in-one smart system. The Sol-Ark 12k is a pre-wired system that requires no fuses, combiners, or breakers, keeping your installation simple and low-cost. Listed below are the things that are INCLUDED in one Sol-ark 12k inverter. 

  • Two built-in 500v Charge Controllers
  • Battery Disconnect
  • 48V Battery Input
  • Battery Sensor
  • Auto-Generator Start
  • Rapid Shut Down Signal
  • Current Sensors
  • Battery Communication
  • PV Disconnect
  • Wiring Knockouts and WiFi
  • 50A AC Breakers with convenient front access points 

With other inverters, you would have to spend thousands of dollars on additional hardware (most of it being required) to reach the equivalent of one Sol-Ark. The color touch screen interface and remote monitoring is also a bonus. Our customers love how easy it is to interact with the Sol-Ark inverters. 


The Sol-Ark 12k can be used on grid-tie, hybrid, and off-grid systems. This means you can install the Sol-Ark for a grid-tie system and have the option to easily add a battery back-up when you are ready. If you already have an existing grid-tie system, you can AC Couple the Sol-Ark 12k and retrofit it to a battery bank.

Unlike most other inverters, the flexible Sol-Ark is not limited to a single type of battery. We informally call this being “battery agnostic”. The Sol-Ark 12k inverter works with the widest variety of 48V battery chemistries, from lead to lithium ion. 

And as mentioned before, the Sol-Ark 12k is expandable up to 6 systems gains. Your options and applications are limitless!

Proven and tested

This inverter is engineered, tested, and serviced in the USA, and has been proven to last well beyond the standard 10 year warranty. 

All Sol-Ark inverters have an option to add Solar Flare / EMP protection. Read full details in the specifications below

How the Sol-Ark 12k Measures Up to Similar Systems

Sol-Ark 12k

Schneider wxPro 6.8 + 3xMPPT80

Sonnen ECO-16 + string inverter

Tesla 2x Powerwall 2 + string inverter



solar pv power (continuous)

12 kw
11.6 kw
12 kw
12 kw

inverter battery continuous power

8 kw
6.8 kw
8 kw
10 kw

pv to battery efficiency at 65%


grid failure ups transfer time

4 ms
8 ms
100 ms
200 ms

low-cost easy install

parallel stacking

120/240/208 v 3 phase

generator support

Are You An Installer Or Contractor Looking For A Sol-Ark Inverter?

Sol-Ark 12k Specifications

Output Power: 12,000W
Max allowed PV power: 9,000W + 9,000W = 16,500W
Max PV power delivered to battery & AC outputs: 12,000W
Max DC voltage: 500V@18A, 450V@20A
MPPT voltage range: 150 – 425V
Starting voltage: 175V
Number of MPPT: 2
Solar strings per MPPT – 2 w/o fuses, 3 w/ fuses
Max DC current per MPPT (self-limiting): 20A@300V, 18A@400V
Max AC coupled input (micro/string inverters): 7,600W
Output Power: 9,600W on grid & 8,000W off grid
Connections: 120/240/208 split phase
Continuous AC power to grid (on grid): 9,600W 40A L-L (240V) / 4,800W 40A L-N (120V)
Continuous AC power to grid (off grid): 8,000W 40A L-L (240V) / 4,800W 40A L-N (120V)
Surge AC power (5 sec): 20,000VA L-L (240V) / 10,000VA L-N (120V)
Parallel Stacking: 2-3 (240V), 3 or 6 (208V)
Frequency: 60/50Hz
Solar strings per MPPT: 2 w/o fuses, 3 w/ fuses
Continuous AC power with grid or Generator : 12,000W 50A L-L (240V) / 6,000W 50A L-N (120V)
CEC Efficiency: 96.0% (peak 97.0%)
Idle Consumption typical – no load: 60W
Sell back power modes: Limited to household or full grid-tied
Design (DC to AC): Transformerless DC
Response Time (Grid-tie to Off-grid): 4ms
Power Factor: +-0.9-1.0
Output Power: 8,000W
Type: Lead-acid or Li-ion
Nominal DC Input: 48V
Capacity: 90 – 2,000Ah
Voltage range: 43.0 – 61.0V
Continuous Battery charging output: 190A
Charging curve: 3 stage w/ equalization
Grid to Battery charging efficiency: 96.0%
External temperature sensor: included
Current shunt for accurate % SOC: integrated
External generator start based on voltage or % SOC: integrated
Communication to Lithium battery: CanBus & RS485
Dimensions (H x W x D): 28.0″ x 17.375″ x 9.37″
Weigth: 77 lbs
Enclosure: NEMA type 1 (Indoor use)
Ambient Temperature (3 variable speed fans): -25 to 55 oC, >45oC derating
Display: Color touch screen
Wi-Fi Communication (monitoring or SW updates): included
Snap on sensors for limited selling to household: included
Standard warranty (verified by HALT testing): 10 years
  • PV DC disconnect switch NEC 240.15
  • Ground fault detection NEC 690.5
  • PV rapid shut down control NEC 690.12
  • PV Arc fault detection NEC 690.11/UL1699B
  • PV input lightning protection
  • AC input/output 50A breakers
  • Battery breaker / disconnect
  • User wiring enclosure with 3/4″ and 1″ knockouts
  • *Optional* Solar Flare / EMP Hardened to 2015 MIL-STD-461G (independently tested June 2018)
  • Electronics certified safety by SGS labs to NEC & UL specs – NEC 690.4B & NEC 705.4/6
  • Grid Sell Back – UL1741-2019/2018, IEEE1547a-2003/2014, FCC 15 Class C, UL1741SA, CA Rule 21, HECO Rule 14H

How to Buy the Sol-Ark 12k Solar Inverter

Click the link below to order a Sol-Ark 12k at the best price you’ll find