Sol-Ark Inverter Lineup: How to Pick Between the 12K, 15K, 18K, EMP and Commercial Models
A Sol-Ark inverter is a 48V hybrid unit that runs a house from solar, battery and grid at the same time and keeps the lights on when the grid drops. The residential models output 120/240V split phase and 120/208V, so they fit a standard US panel; the commercial models are three phase. The reason installers specify them is the all-in-one design: solar MPPT inputs, battery charger, transfer switching and generator input are pre-wired inside one cabinet instead of spread across separate boxes.
This collection holds 11 Sol-Ark units. Residential inverters run from $4,350 for the 12K to $7,740 for the EMP-hardened 15K; three-phase commercial units are $11,075 for the 30K and $14,455 for the 60K.
How to choose a Sol-Ark hybrid inverter
-
Continuous output. Size to the loads you want backed up at once. The Sol-Ark 12K 48V Solar Hybrid Inverter delivers 12kW AC with 15kW of solar input, enough for a typical home's essentials plus an air conditioner. The Sol-Ark 15K All-In-One Pre-Wired Hybrid Inverter is the usual whole-home choice at 15kW.
-
Surge for motors. Well pumps, HVAC compressors and shop tools need short bursts well above their running watts. The Sol-Ark 18K All In One Pre-Wired Hybrid Inverter provides 18kW continuous and 36kW of surge for 10 seconds, with 40kW-plus of AC-coupled PV input for large arrays.
-
EMP hardening. The Sol-Ark 15K EMP Hybrid/Off Grid Inverter keeps the 15,000W continuous rating and 19,500W of allowed PV, adds EMP shielding and fleet management, and is battery agnostic. The 12K EMP does the same at 12kW.
-
Three phase. A shop, farm or small commercial building on 120/208V or 277/480V three-phase service needs the 30K or 60K, not a residential unit. The 30K delivers 30kW with 39kW of solar input.
Popular picks in this collection
| Product |
Key numbers |
Best for |
Price from |
| Sol-Ark 12K |
12kW AC, 15kW PV, 500V max PV |
Mid-size homes, partial backup |
$4,350 |
| Sol-Ark 15K |
15kW, 48V, pre-wired |
Whole-home backup |
$5,650 |
| Sol-Ark 18K |
18kW, 36kW surge, 97.6% efficiency |
Large homes, heavy HVAC, off-grid |
$6,415 |
| Sol-Ark 30K 3-Phase |
30kW, 39kW PV, 10yr warranty |
Commercial 120/208V service |
$11,075 |
Sizing tips
- Run the Solar Kit Calculator with your ZIP code and appliance list. It returns inverter kW alongside battery and array size, and the sol ark inverter 12k versus 15k question usually answers itself from the result.
- Check your service type before anything else. Residential Sol-Ark units are 120/240V and 120/208V; a three-phase building needs the 30K or 60K.
- Plan the battery to the inverter. All the residential units are 48V, so a 48V lithium bank in the 10kWh to 30kWh range is the common pairing for overnight backup.
- Leave PV headroom. The 12K accepts 15kW of solar and the 15K EMP 19,500W, so you can add panels later without changing the inverter.
- Budget for a licensed electrician. These are hard-wired to the main panel and, in most jurisdictions, need a permit and utility interconnection paperwork.
Frequently asked questions
What does a Sol-Ark 15k inverter cost? The standard 15K is $5,650 here and the EMP-hardened version is $7,740. The 12K starts at $4,350 and the 18K at $6,415; sol ark inverter price differences come down to output, surge and hardening.
Do I need batteries to use a Sol-Ark? They are hybrid inverters designed around a 48V battery bank for backup. You can run grid-tied with solar, but the outage protection depends on storage, so most installs include batteries from the start.
Which model for a fully off-grid home? The 18K is described for the toughest off-grid and backup demands, with 36kW of surge for pumps and HVAC. The 15K EMP is also listed as hybrid/off-grid and works with any battery brand.
Sol-Ark inverters ship free to the mainland US from brand partner warehouses, usually within a few business days, with 30-day returns. Call us with your load list and service type and we will confirm the model before you commit.
