EG4 18kPV Complete Hybrid Solar Kit | 11kW Solar | 20.48kWh Server Rack Batteries

Name: EG4 18kPV Complete Hybrid Solar Kit | 11kW Solar | 20.48kWh Server Rack Batteries
Brand: EG4
SKU: EG4-18KPV-10-20.4-SG-O
Price: 15175.88 USD
Availability: InStock

BY: EG4

SKU: EG4-18KPV-10-20.4-SG-O

| Availability: In stock

$17,699.00

$15,175.88

You Save: $2,523.12

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Product Highlights

Built for home backup and off-grid power
20,400 Wh capacity for extended backup and off-grid runtime
10,000 W solar output for larger off-grid energy systems
12,000 W output to run high-demand appliances and equipment

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EG4 18kPV Complete Hybrid Solar Kit | 11kW Solar | 20.48kWh Server Rack Batteries

Generate solar power, store energy for later, and prepare your home for outages with the EG4 18kPV Complete Hybrid Solar Kit. This system combines an EG4 18kPV hybrid inverter, 20 × SunGold Power 550W monocrystalline solar panels, and your choice of server rack batteries totaling 20.48kWh of nominal storage.

The inverter delivers 12,000W of continuous output at 240V and supports grid-tied, grid-assist, and off-grid operation. Whether you want to use more of your own solar energy or build a dependable backup system, this kit provides a flexible foundation sized around your household’s energy needs.

EG4 18KPV Complete Hybrid Solar Kit Features

High-Capacity Hybrid Inverter – Delivers 12,000W continuous output at 240V with 18,000W of utilized PV input capacity to support demanding household loads and flexible energy management.
20.48kWh Server Rack Battery Options – Includes 4 × 5.12kWh LiFePO4 batteries from your choice of EG4, SunGold Power, Rich Solar, RUiXU, or SOK, with closed-loop or open-loop operation depending on the selected configuration.
11kW Solar Array – Equipped with 20 × SunGold Power 550W Monocrystalline PERC Solar Panels, providing 11,000W of combined rated solar capacity for daytime power and battery charging.
Closed-Loop Integration with EG4 Batteries – The EG4 LL-S option enables direct battery-to-inverter communication for coordinated charging and battery monitoring.
Expandable System – Supports future solar and battery expansion within the inverter’s limits and battery compatibility requirements.
Included System Accessories – Comes with cables, breakers, fuses, mounting accessories, and a matching battery rack or cabinet based on the selected configuration.

EG4 18KPV Complete Hybrid Solar Kit Applications

Whole-Home Backup Power - Designed to support entire homes during outages, keeping essential and major appliances running.
Hybrid Grid-Tied Systems - Store excess solar energy for use during peak utility rates or nighttime consumption.
Off-Grid Living - Suitable for cabins, rural homes, and remote setups requiring reliable independent power.
Energy Independence & Cost Savings - Reduce reliance on the utility grid and lower monthly electricity bills.
High Energy Demand Homes - Ideal for larger households with higher daily energy consumption.

What's Included

Everything you need is included with your product.

Inverter:

EG4 18KPV - 12000W Output - 18000W PV Input - 48V - 120/240V Split Phase - Hybrid

Battery Options (Choose One):

4 x Sungold Server Rack - 20.4kWh - Open Loop
4 x EG4 LL-S - 20.4kWh - Closed Loop
Rich Solar Alpha 5 Pro - 20.4kWh - Open Loop
4 x RUiXU 51.2V - 20.4kWh - Open Loop
4 x SOK 48V - 20.4kWh - Open Loop

Solar Panel:

20 × SunGold Power 550 Watt Monocrystalline Solar Panel (11kW)

Accessories:

2 x Rich Solar 10AWG Solar Extension Cable - 50ft
2/0AWG Battery Cable - 6ft - 5/16 Both Ends (Set Red & Black)
2 x 25A PV Breaker
20 x Z-Brackets
2 x 400A Class-T Fuse
2/0AWG Battery Cable - 6in - 5/16 Both Ends (Red Only)
3 x Replacement Inline Fuse Holder | Choose Amp: 10A, 15A, 20A, 30A

Accessory Based on Battery Choice:

SunGold Power 6-Slot Enclosed Battery Cabinet (Comes with SunGold)
EG4 Pre-Assembled EG4 Enclosed Battery Rack | 6 Slot | Wheels Included | Bus Bar Covers | Welded (Grey) (Comes with EG4)
Rich Solar 6-Slot Enclosed Battery Cabinet (Comes with Rich Solar)
RUiXU 6-Slot Battery Cabinet (Comes with RUiXU)
SOK Battery Cabinet with Busbar (Comes with SOK)
4 x 4AWG Cable - 1ft - 5/16 Both Ends (Red & Black) (Comes with SOK)

EG4 18KPV Complete Hybrid Solar Kit Specifications

EG4 18KPV - 12000W Output - 18000W PV Input - 48V - 120/240V Split Phase - Hybrid Specifications

AC input data

Specification	Details
Nominal ac voltage	120/240VAC; 120/208VAC (L1/L2/N required)
Frequency	50/60Hz
Max. ac current	50A @ 240VAC
Max. ac input power	12000W
Max. ac bypass	200A

AC grid output data

Specification	Details
Max. output current	50A
Output voltage	120/240VAC; 120/208VAC (L1/L2/N required)
Operating voltage range	180-270VAC
Nominal power output	@240V 12000W \| @208V 10400W
Frequency	50/60Hz
Power factor	0.99 @ full load
Reactive power adjust range	(-0.8) ~ (+0.8) leading adjustable
Max cont. line wattage	6000W
Peak power (surge capacity)	w/ PV: 14700W (10 min), 15500W (5 min) \| w/o PV: 13500W (10 min)
THD @full load	<5%
Open loop response time (OLRT)	<2 seconds
Time to steady state	<10 seconds
Transfer time	20ms (Default), 10ms (Configurable) \| Parallel – 20ms

Backup/ups ac output data

Specification	Details
Rated output current (240/208VAC)	50A
Ac bypass (generator)	90A
Nominal output voltage	240 \| 120/240 \| 120/208VAC
Rated output power	@240VAC 12000W \| @208VAC 10400W
Max. continuous line wattage	8000W per 120V
Peak power	w/ PV: 14700W (10 min), 15500W (5 min) \| w/o PV: 13500W (10 min)
THDV (total harmonic distortion voltage)	<5%
Open loop response time (OLRT)	<2 seconds
Time to steady state	<10 seconds
Switching time	10ms

PV input data

Specification	Details
Number of mppts	3
Inputs per mppt	2 (MPPT 1) \| 1 (MPPT 2) \| 1 (MPPT 3)
Max. usable input current	25A (MPPT 1) \| 15A (MPPT 2) \| 15A (MPPT 3)
Max. short circuit input current	31A (MPPT 1) \| 19A (MPPT 2) \| 19A (MPPT 3)
Dc input voltage range	100-600 VDC*
Unit startup voltage	100 VDC
MPPT operating voltage range	140-500 VDC*
Nominal mppt voltage	360 VDC
MPPT voltage high protection	550 VDC***
Maximum utilized solar power	18000W
Recommended maximum solar input	21000W

Efficiency

Specification	Details
CEC	96.9%
Maximum efficiency (PV to grid)	97.5%
Maximum efficiency (battery to grid)	94%
Maximum efficiency (PV to battery)	99.9%
Idle consumption (normal \| standby mode)	~70W \| ~18W

Battery data

Specification	Details
Compatible battery types	Lead-acid/Lithium
Max. charge/discharge current	250A
Nominal voltage	48 VDC
Voltage range	40-60 VDC (Lithium); 40-60 VDC (Lead-acid)
Recommended battery capacity per inverter	≥300Ah

General data

Specification	Details
Max. units in parallel	10
Product dimensions (H×W×D)	34.3×20.5×11.2 in (870×520×285mm)
Unit weight	121 lbs. (55kg)
Design topology	High Frequency - Transformerless
Relative humidity	0-100%
Operating altitude	<2000m (<6561ft)*
Operating ambient temperature range	-13°F – 140°F (-25°C – 60°C)
Storage ambient temperature range	-13°F – 140°F (-25°C – 60°C)
Noise emission (typical)	68dB @ 3ft
Locked rotor amps (LRA)	180A
Communication interface	RS485/Wi-Fi/CAN
Standard warranty**	10-year standard warranty
Outdoor rating	NEMA 4X
Safety features	PV Arc Fault Protection, PV Ground Fault Protection, PV Reverse Polarity Protection, Pole Sensitive Leakage Current Monitoring Unit, Surge Protection Device, Integrated PV Disconnect

Sungold Server Rack - 20.4kWh - Open Loop Specifications

Specification	Details
Product Model	SG48100P
Battery Type	Lithium iron phosphate battery
Rated capacity	100Ah
Nominal voltage	51.2V
Recommended charging voltage	54.5V
Charging Limited Voltage	57.6V
SOC working range	0~100%
Standard discharge current	50A
Maximum continuous discharge current	100A
Standard charging current	50A
Maximumcontinuous-charge current	100A
Maximum cut-off voltage for charging.	57.6V
Charge cutoff.current	5A
Disharge cut-off voltage	43.2V
PACK.cycle life	≥7000
Thermal management method	Natural heat dissipation
IP protection class	IP31 battery box
Flammability rating	plastic parts UL94 V-0
Total system mass	Around 93lb
Battery system shell materia	BLACK Q235A
Shipping SOC	SOC45-55%
Dimension (LxWxH mm)	19.3x18.9x5.5inch
Design life	15 Year
Parallel function	Supports up to 32 batteries in parallel
Anti-theft function	sensor G-sensor anti-theft function
Display function	English smart display
Charging current limit function	Current limit 20A
Communication mode	RS232/RS485/CAN
Communication protocol	Support multiple protocols
Storage ambient temperature	14°F~113°F
Working temperature	Battery charging:32°F~113°F, Battery discharging:-4°F~140°F
Relative humidity of working environment	≤95

EG4 LL-S - 20.4kWh - Closed Loop Specifications

Module operating parameters

Specification	Details
Voltage	51.2v
Capacity	100ah
Charging voltage (bulk/absorb)	56.8v \| 56.2v (+/-0.2v)
Float	54v (+/-0.2v)
Soc cutoff	20%
Charging current	100a (Max. continuous) \| 50a
Discharging current	100a (Max. continuous) \| 50a

Environmental parameters

Specification	Details
Charging range	32°F – 122°F (0°C – 50°C)
Discharging range	-4°F – 131°F (-20°C – 55°C)
Storage range	32°F – 113°F (0°C – 45°C)
Operating altitude	<16404 ft. (<5000 m)
Ingress protection	IP20
Mounting hardware	Stainless steel
New Row	New Row

Bms parameters

Specification	Details
Cell voltage protection	3.8v
Module voltage protection	60.0v
Over charging current 1	>102a
Over charging current 2	>120a
Temperature protection	<23°F or >158°F \| <-5°C or >70°C

Discharge

Specification	Details
Cell voltage protection	2.3v
Module voltage protection	44.8v
Over discharging current 1	>102a
Over discharging current 2	>150a
Short-circuit	>300a
Temperature protection	<-4°F or >167°F \| <-20°C or >75°C
Pcb temp protection	>230°F (>110°C)

General specifications

Specification	Details
Cell balance	120ma
Temperature accuracy	3%
Voltage accuracy	0.5%
Current accuracy	3%
Soc	5%
Power consumption (sleep & off mode)	<300ua
Power consumption (operating)	<25ma
Communication ports	RS485/CAN
Maximum units in series	1
Maximum units in parallel	64
E-stop function	Yes
Dimension (h×w×d)	6.1in×17.4in×19.3in (15.5cm×44.2cm×49cm)
Weight	99.6 lbs. (45.2 kg)

Standards and certifications

Specification	Details
Standards and certifications	UL1973, UL9540A

Rich Solar Alpha 5 Pro - 20.4kWh - Open Loop Specifications

Specification	Details
Battery Type	LFP Battery
Nominal Voltage	51.2V
Nominal Capacity	100Ah
Minimum Capacity	99.5Ah
Nominal Energy	5120Wh
Charging Voltage	56V
Discharging Cutoff Voltage	44.8V
Standard Charging Current	20A
Maximum Charging Current	100A
Standard Discharge Current	50A
Continuous Discharge Current	100A
Maximum Discharge Current	100A
Shell Material	Sheet metal casing
Weight	99.20lb
Initial AC（1000Hz）Internal Resistance	≤50mΩ
Monthly Self-Discharge Rate	≤5%
Overall Dimensions	17.7x17.8x5.2in
Cycle Life(Times)(25℃±2℃)	≥7000; Capacity Retention≥70%

RUiXU 51.2V - 20.4kWh - Open Loop Specifications

Specification	Details
Rated voltage	51.2V
Max. voltage range	44.8~57.6V, Shipping voltage>51.2V
Charge voltage	56.0V
Float charge voltage	54.6V
Low voltage cut-off	44.8V
Nominal energy	5.12KWh
Usable energy	4.92kWh
Nominal capacity	100Ah
Dimension	482133.5460mm (18.95.218.1 inch)
Weight	~46kg (101lb)
Standard charge current	≤50A
Max. charge current	70A
Standard discharge current	≤50A
Max. discharge current	100A (initial temp. ≤35℃)
Peak discharge current	101~119A@5S 120~200A@5S
Communication	RS485 /CAN
Max parallel number	32pcs
Operation temperature¹	Charge: 0~50℃ \| Discharge:-20~50℃
Storage temperature	0℃

SOK 48V - 20.4kWh - Open Loop Specifications

Electrical Performance

Specification	Details
Nominal Voltage	51.2V
Nominal Capacity	100Ah
Energy	5120Wh
Self Discharge	<3% / Month
Cells	3.2V 100Ah

Charge Performance

Specification	Details
Recommended Charge Current	50A
Maximum Charge Current	100A
Recommended Charge Voltage	≤58.4V
Maximum Batteries in Series	48

Discharge Performace

Specification	Details
Maximum Continuous Discharge Current	100A
Peak Discharge Current	120A/min
Recommended Low Voltage Disconnect	44.8V

Temperature Performance

Specification	Details
Discharge Temperature	-4 ~ 140 °F (-20 ~ 60°C)
Charge Temperature	-4 ~ 122 °F (-20 ~ 50°C)
Storage Temperature	23 ~ 95 °F (-5 ~ 35 °C）
BMS High Temperature Cut-O	Discharge 167 °F (75 °C) \| Charge 158 °F (70 °C)
Reconnect Temperature	Discharge 149 °F (65 °C) \| Charge 140 °F (60 °C)

Mechanical Performance

Specification	Details
Dimension (L x W x H)	19.1416.955.22inch
Approx. Weight	100lb
Terminal Type	M8
Terminal Torque	80 ~ 100 in-Ibs
Case Material	SPCC+SGCC
Enclosure Protection	IP20

Inverter Supported

Specification	Details
CAN	RS485
Victron/SMA/SOFAR /Studer Innotec	Voltronic/RCT/MPP /Alphaoutback
PYLON/Sol-Ark/Solis/Goodwe /Deye/Growatt/SAJ/Megarevo /INVT/Sermatec/TBB/MUST /Sunsynk	SRNE/RYLON/Growatt
Schneider
LUXPOWER

Frequently-Asked Questions

Can this kit power my entire home?

It may support whole-home or essential-load backup, depending on your appliances, simultaneous demand, and starting loads. System sizing should account for both the inverter’s output and your daily energy consumption.

Why does the kit have 11kW of solar and a 12kW inverter?

These figures describe different capabilities. 11kW is the combined rated capacity of the included panels; 12kW is the inverter’s continuous AC output rating at 240V. Actual solar production varies with sunlight, temperature, shading, and installation conditions.

How long will the batteries provide backup power?

Runtime depends on the connected loads, available battery charge, discharge settings, and system losses. The battery bank provides 20.48kWh of nominal storage; usable energy will be lower.

Can I add more panels or batteries later?

Expansion may be possible within the inverter’s electrical limits and the selected battery manufacturer’s requirements. Additional equipment and installation changes may be necessary.

Manual

Shipping & Easy Returns

Shipping is free across the Lower 48. No fuel surcharges, no residential fees, and no liftgate charge on freight orders. The price you see is the price you pay. Read our full Shipping Policy here.

Most orders leave the warehouse in 1 to 2 business days and arrive within 3 to 10 business days. We send tracking the moment it ships.

Anything that ships on a pallet goes freight with liftgate and pallet jack included, so the driver gets it off the truck and onto the ground at your address. The carrier will call you directly to schedule a delivery window.

Returns are 30 days from delivery. For freight deliveries, inspect the shipment before you sign for it. If something is damaged in transit, note it on the delivery receipt and we handle the freight claim, not you. Read more about our Returns Policy here.

Why Buy From Us

Buying solar online should not mean guessing your way through the install. Here’s what you get with Off-Grid Source.

We size the system, not just sell it. Call before you order and a sales engineer will check the kit against your actual loads, tell you if you’re buying too much or too little, and list the site-specific parts your install will need.
A+ rated by the Better Business Bureau. Another trust signal that you’re buying from a real company that stands behind the sale.
Free shipping across the Lower 48. No hidden freight charges, residential fees, or liftgate surprises at checkout.
Guaranteed best prices. Find the same product for less elsewhere and we’ll match it.
30-day easy returns. If it is not the right fit, we’ll help you get it sent back.
A real person on the phone. Product questions, sizing, install planning, warranty help: call us at +1 (877) 556-3347.

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Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

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Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.

EG4 18kPV Complete Hybrid Solar Kit | 11kW Solar | 20.48kWh Server Rack Batteries

Product Highlights

EG4 18kPV Complete Hybrid Solar Kit | 11kW Solar | 20.48kWh Server Rack Batteries

EG4 18KPV Complete Hybrid Solar Kit Features

EG4 18KPV Complete Hybrid Solar Kit Applications

What's Included

EG4 18KPV Complete Hybrid Solar Kit Specifications

EG4 18KPV - 12000W Output - 18000W PV Input - 48V - 120/240V Split Phase - Hybrid Specifications

Sungold Server Rack - 20.4kWh - Open Loop Specifications

EG4 LL-S - 20.4kWh - Closed Loop Specifications

Rich Solar Alpha 5 Pro - 20.4kWh - Open Loop Specifications

RUiXU 51.2V - 20.4kWh - Open Loop Specifications

SOK 48V - 20.4kWh - Open Loop Specifications

Frequently-Asked Questions

Manual

Shipping & Easy Returns

Why Buy From Us

Why Choose Off Grid Source

Our Customers Tell It Better Than We Do

They Stood By Me

Awesome Service!

Real Person, Honest Service.

Easy Return

Totally Off Grid.

Great Product! Fast Shipping

Excellent Customer Service