20,000 Watt Solar Power System

20,000 Watt Solar System Kits for Large Homes, Shops and Farms

A 20,000 watt solar system is built for properties that a single residential inverter cannot carry: a 3,000 to 4,000 square foot house with two or three HVAC units, a workshop with 240V machines, a farm with pumps and coolers, or a small commercial building that wants to keep operating through outages. Everything in this collection delivers 20kW or more of continuous 120/240V split-phase output, either from two inverters running in parallel or from two or three hybrid inverters tied to a stacked battery bank.

There are 14 products here from BigBattery, EG4 and Sungold Power, priced from about $14,970 for a 24kW inverter-and-battery system to about $32,000 for 92.16kWh of storage with three EG4 18kPV inverters. Some kits include panels; the BigBattery ETHOS systems ship as inverters and batteries only.

How to choose a 20kW-class system

• Off-grid kit with panels, or hybrid ESS without. The Sungold Power 20kW Off-Grid Solar Kit SGR-20K32P is complete: two 10kW inverters paralleled, two IP65 PowerMax outdoor batteries (32.14kWh), thirty-two 450W bifacial panels (14,400W), Z-brackets, breakers and cables. The BigBattery ETHOS 40.96kWh + 2 x EG4 18kPV ESS is a UL 9540 certified grid-interactive core that accepts up to 36kW of solar you source separately.
• Storage depth. A large home with electric heat or an EV can use 60 to 100kWh a day. The ETHOS line scales from 40.96kWh (8 modules) to 92.16kWh (18 modules), and the Sungold Power 24kW Off-Grid Kit FR-24K60CP pairs 61.44kWh of CoreX 5 Pro rack batteries with 18,290W of 590W panels.
• Two or three inverters. Two EG4 18kPV units give 24kW continuous and 36kW of PV input; three give 36kW and 54kW of PV. Pick three only if you have the panel space and the loads to justify it.
• Grid tie. The SungoldPower 22.8kW Hybrid Kit SGH-11N5E runs dual split-phase inverters at 20kW continuous with grid-tie capability, 51.2kWh of lithium and 36 x 450W panels for a home that stays connected but wants to sell back or self-consume.
• Battery placement. PowerMax batteries are IP65 for outdoor mounting; CoreX 5 Pro and ETHOS modules stack in a rack or on the floor indoors.

Popular picks in this collection

Sizing tips

• Start with a year of utility data. Peak-month daily kWh sets battery size; the lowest-sun month sets the array. The Solar Kit Calculator takes your appliance list and ZIP code and gives a first estimate for both.
• Do not oversize the inverters and undersize the panels. A 24kW inverter pair with 14kW of panels is normal; the reverse leaves you buying batteries you cannot fill.
• If you are choosing between a 10 000 watt solar system and this class, count the 240V loads. Two AC compressors, a well pump and an electric range at once is 20kW territory.
• Reserve wall or floor space. Eighteen ETHOS modules or twelve CoreX rack batteries need a dedicated mechanical room or garage bay with clearance.

Frequently asked questions

How many panels does a 20,000 watt solar panel system use? The Sungold kits here include 31 to 36 panels rated 450W to 590W, for 14.4kW to 18.3kW of array. The BigBattery ESS units accept up to 36kW or 54kW of solar but ship without panels.

Is a 20kW system overkill for a normal house? Usually. A 2,000 square foot home with one AC unit is served by a 12kW system. Choose 20kW when you run several large 240V loads simultaneously or when a shop or barn shares the service.

Can these be installed as grid-tied backup? The ETHOS + EG4 18kPV systems and the SGH-11N5E hybrid are designed for grid interaction. The SGR and FR off-grid kits are for properties that run without a utility connection.

All systems ship free to the mainland US from our brand partner warehouses with 30-day returns. Call us with your load list and utility history and we will spec the inverter count, storage and panels before you commit.