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Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 29.4kWh (6 x 4.9kWh Batteries), 200 A Transfer Switch

Fortress Power Avalon HV Pro ESS battery system components and mobile app interface

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SKU PES-ESS-BTS-0008

Fortress Power Avalon HV Pro ESS with Smart Energy Panel, 11.4kW Inverter, 29.4kWh (6 x 4.9kWh Batteries), 200 A Transfer Switch

$23,444.96 USD

~~$21,461.16~~ $23,444.96 USD

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9+ sold

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Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

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Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

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What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

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Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Fortress power Avalon HV Pro ESS 11.4kW 29.4kWh is designed to deliver high-performance energy storage, this system offers extensive backup power with easy expandability. It features a user-friendly app for effortless control and advanced safety systems for secure operation. Whether you are upgrading an existing setup or installing a new one, this energy storage solution provides the reliability and efficiency needed to safeguard your home’s power.

Fortress Power Avalon HV Pro ESS 11.4kW 29.4kWh Features

Extensive backup power

Offers substantial energy reserves to keep your home running during extended outages.

User-friendly app for easy management

Simplifies energy monitoring and control with an intuitive interface.

Modular expansion capability

Easily add more storage to meet future energy demands, ensuring long-term flexibility.

Advanced safety and monitoring systems

Includes comprehensive safeguards to ensure reliable and secure operation.

Flexible installation options

Suitable for various setups, supporting both indoor and outdoor applications.

S

How it works

The Fortress Power Avalon HV Pro ESS 11.4kW 29.4kWh is truly an all-in-one, whole home backup system. The system combines a hybrid inverter, high-voltage battery, and a smart energy panel.

Smart Energy Panel

Maintain control of your large and small appliances. Plus, monitor how your system is working.

HV Inverter

Convert DC energy from your solar panels to AC energy to serve your home needs.

HV Battery

Stores your energy, providing you safety and security during a power outage.

Specifications

AVALON HV INVERTER
DC Input (PV)
Model	AV-INV-081423-11.4
Max. Input Voltage	600 V
Rated Voltage	380 V
Start-Up Voltage	80 V
MPPT Voltage Range	80 - 520 V A
Max. Input Current Per String	16 A
Max. Short Circuit Current Per String	25.6 A
Number Of MPPTs/Number Of Strings Per MPPT	4/1
AC Output
Rated Output Power	11.4 kW
Max. Apparent Output Power (Grid)	11.4 kVa
Max. Apparent Output Power (Off-Grid)	18.2 kVa, 10 sec
Back-Up Switch Time	<10 ms
Rated Output Voltage (L1-L2)	240 V
Rated Output Voltage (L1/L2-N)	120 V
Ac Output Voltage Range	211 - 264 V
Rated Frequency	60 Hz
Frequency Range	55 - 65 Hz
Rated Output Current	47.5 A
Max. Output Current (Grid)	47.5 A
Max. Output Overcurrent Protection, 10 sec (off-Grid)	76 A
Max. Allowance Phase Configurations	100%
Backup Support Configurations	whole-home and dedicated loads
Power Factor	>0.99 (0.8 leading - 0.8n lagging)
THD	<3%
AC Input (Grid)
Input Voltage Range	211 - 264 V
Max. Input Current	71.3 A
Frequency Range	58.8 - 61.2 Hz
Efficiency
PV Max. Efficiency	97.60%
PV CEC Efficiency	97.20%
Battery Charged by PV Max. Efficiency	98.50%
Battery Charged/Discharged to AC Max. Efficiency	97.00%
Protection
Ground Fault Detection	Yes
Residual (Leakage) Current Detection	Yes
Integrated AFCI (DC Arc-Fault Circuit Protection)	Yes
Dc Reverse-Polarity Protection	Yes (PV only)
Rapid Shutdown NEC 2017	integrated sunspec-certified transmitter
RSD Receiver	APSmart
Manual Inverter Bypass Switch	Yes
Energy Storage
Battery voltage range	120-500 V
Maximum Charge/Discharge Current	50 A
Battery Communication	CAN/RS485
General Data
Dimensions (WHD)	221.8734.888.62 in (555.5866219mm)
Weight	89.59 Ibs (40.64 kgs)
Mounting	wall mount
Topology **	transformerless
Operation Temperature Range	-13 °F to 140 °F (-25°C to 60°C)
Ingress Protection	TYPE 4X (IP66)
Noise Emission	<30 dB(A)
Cooling Method	natural convection
Max. Operation Altitude	13,120 h (4000m)
Compliance	UL 1741, UL 1741 SA, UL 1741 SB, UL9540, IEEE 1547-2018, IEEE, 1547.1-2020, UL 1699B, UL 1998, California Rule 21, HECO Rule 14H, NEC 690.12-2020, CAN/CSA C22.2107.1-1, FCC Part 15 Class B
Generator Support	Yes

AVALON HV BMS & BATTERY
Model No	AV-BATT-081423-6
Battery Modules	6
Nominal Voltage (V)	288
Operation Voltage Range (V)	238.5 ~ 315
Nominal Capacity (Ah)	102
Nominal Energy (Kwh)	29.4
Nominal Charge/Discharge Current (A)	50
Maximum Units In Parallel	4
Warranty (Years)	10
Cycle Life @ EOL 70%	8000
Communication Protocol	CAN
Weight	573.2 lbs (260 kg)
Dimensions	43 x 47.87 x 10.96 in (1092 x 1215.9 x 278.4 mm)
Ingress Protection	IP65
Operation Temperature Charge	0°C to 50°C
Operation Temperature Discharge	-20°C to 55°C
Certifications	UL1973, UL9540. UL9540A, CEC, SGIP, AC156
Transportation Classification	UN3480, Class 9

AVALON SMART ENERGY PANEL
Performance
Model	AV-EP-081423
AC Voltage	120/240 V
Feed-in Type	Split Phase
Grid Frequency	50/60 Hz
Current Rating	200 A
Max Input Short Circuit Current	10 kA
Overcurrent Protection Device	100 - 200A; service entrance rated
Ac Meter	non-RGM is standard, Revenue Grade Meter is optional
Primary Connectivity	ethernet / wifi / bluetooth
User Interface	Fortress App
Backup Transition	automatic transfer for backup
Expandability	supports up to 3 Avalon HV hybrid inverters, up to 35 kW load
Warranty	10 years
Mechanical
Dimensions	35.4 x 22.2 x 9.45in (900 x 565 x 240mm)
Weight	55 lbs (25 kg)
Mounting Options	wall mount
Electrical Connections
Smart Load Control	12 positions. Control up to 12 single phase loads, 6 split phase loads, or any combination, up to 50A
Smart Load Control Modes	automatic, scheduled, or manual control
Ev Charging Smart Load Provision	up to 50A
Ac Coupling Smart Load Provision	up to 50A
Generator Smart Load Provision	up to 50A
Non-Backup Lug Connections	included
Environmental
Operating Temperature	-4 °F to 122 °F (-20C to 50C)
Operating Humidity	up to 100% condensing
Maximum Elevation	3000m (9,843 ft)
Environment	indoor and outdoor rated
Enclosure Type	NEMA 3R
Compliance & Certificates
Certifications	UL67, UL1741 PCS, UL869A, UL916
Emissions	FCC Part 15, ICES 003
Accessories (not included, unless otherwise noted)
Main Breaker	Eaton CSR2200N, 2pole/200A/25kAIC
PCS Inverter Grid Breaker (Included)	NDB2T-63, 2pole/200A/25kAIC
PCS Inverter Backup Breaker	Eaton BR260orBR2125, 1or2or3pole/60Aor125A/25kAIC
Other System Components (EV, AC Coupled Inverter, Generator)	based on component spec
Hold Down Kit	Eaton X-IQ-NA-HD-200A with screws

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Fortress Power Avalon HV Pro ESS 11.4kW 29.4kWh Features

Extensive backup power

Offers substantial energy reserves to keep your home running during extended outages.

User-friendly app for easy management

Simplifies energy monitoring and control with an intuitive interface.

Modular expansion capability

Easily add more storage to meet future energy demands, ensuring long-term flexibility.

Advanced safety and monitoring systems

Includes comprehensive safeguards to ensure reliable and secure operation.

Flexible installation options

Suitable for various setups, supporting both indoor and outdoor applications.

S

How it works

The Fortress Power Avalon HV Pro ESS 11.4kW 29.4kWh is truly an all-in-one, whole home backup system. The system combines a hybrid inverter, high-voltage battery, and a smart energy panel.

Smart Energy Panel

Maintain control of your large and small appliances. Plus, monitor how your system is working.

HV Inverter

Convert DC energy from your solar panels to AC energy to serve your home needs.

HV Battery

Stores your energy, providing you safety and security during a power outage.

Specifications

AVALON HV INVERTER
DC Input (PV)
Model	AV-INV-081423-11.4
Max. Input Voltage	600 V
Rated Voltage	380 V
Start-Up Voltage	80 V
MPPT Voltage Range	80 - 520 V A
Max. Input Current Per String	16 A
Max. Short Circuit Current Per String	25.6 A
Number Of MPPTs/Number Of Strings Per MPPT	4/1
AC Output
Rated Output Power	11.4 kW
Max. Apparent Output Power (Grid)	11.4 kVa
Max. Apparent Output Power (Off-Grid)	18.2 kVa, 10 sec
Back-Up Switch Time	<10 ms
Rated Output Voltage (L1-L2)	240 V
Rated Output Voltage (L1/L2-N)	120 V
Ac Output Voltage Range	211 - 264 V
Rated Frequency	60 Hz
Frequency Range	55 - 65 Hz
Rated Output Current	47.5 A
Max. Output Current (Grid)	47.5 A
Max. Output Overcurrent Protection, 10 sec (off-Grid)	76 A
Max. Allowance Phase Configurations	100%
Backup Support Configurations	whole-home and dedicated loads
Power Factor	>0.99 (0.8 leading - 0.8n lagging)
THD	<3%
AC Input (Grid)
Input Voltage Range	211 - 264 V
Max. Input Current	71.3 A
Frequency Range	58.8 - 61.2 Hz
Efficiency
PV Max. Efficiency	97.60%
PV CEC Efficiency	97.20%
Battery Charged by PV Max. Efficiency	98.50%
Battery Charged/Discharged to AC Max. Efficiency	97.00%
Protection
Ground Fault Detection	Yes
Residual (Leakage) Current Detection	Yes
Integrated AFCI (DC Arc-Fault Circuit Protection)	Yes
Dc Reverse-Polarity Protection	Yes (PV only)
Rapid Shutdown NEC 2017	integrated sunspec-certified transmitter
RSD Receiver	APSmart
Manual Inverter Bypass Switch	Yes
Energy Storage
Battery voltage range	120-500 V
Maximum Charge/Discharge Current	50 A
Battery Communication	CAN/RS485
General Data
Dimensions (WHD)	221.8734.888.62 in (555.5866219mm)
Weight	89.59 Ibs (40.64 kgs)
Mounting	wall mount
Topology **	transformerless
Operation Temperature Range	-13 °F to 140 °F (-25°C to 60°C)
Ingress Protection	TYPE 4X (IP66)
Noise Emission	<30 dB(A)
Cooling Method	natural convection
Max. Operation Altitude	13,120 h (4000m)
Compliance	UL 1741, UL 1741 SA, UL 1741 SB, UL9540, IEEE 1547-2018, IEEE, 1547.1-2020, UL 1699B, UL 1998, California Rule 21, HECO Rule 14H, NEC 690.12-2020, CAN/CSA C22.2107.1-1, FCC Part 15 Class B
Generator Support	Yes

AVALON HV BMS & BATTERY
Model No	AV-BATT-081423-6
Battery Modules	6
Nominal Voltage (V)	288
Operation Voltage Range (V)	238.5 ~ 315
Nominal Capacity (Ah)	102
Nominal Energy (Kwh)	29.4
Nominal Charge/Discharge Current (A)	50
Maximum Units In Parallel	4
Warranty (Years)	10
Cycle Life @ EOL 70%	8000
Communication Protocol	CAN
Weight	573.2 lbs (260 kg)
Dimensions	43 x 47.87 x 10.96 in (1092 x 1215.9 x 278.4 mm)
Ingress Protection	IP65
Operation Temperature Charge	0°C to 50°C
Operation Temperature Discharge	-20°C to 55°C
Certifications	UL1973, UL9540. UL9540A, CEC, SGIP, AC156
Transportation Classification	UN3480, Class 9

AVALON SMART ENERGY PANEL
Performance
Model	AV-EP-081423
AC Voltage	120/240 V
Feed-in Type	Split Phase
Grid Frequency	50/60 Hz
Current Rating	200 A
Max Input Short Circuit Current	10 kA
Overcurrent Protection Device	100 - 200A; service entrance rated
Ac Meter	non-RGM is standard, Revenue Grade Meter is optional
Primary Connectivity	ethernet / wifi / bluetooth
User Interface	Fortress App
Backup Transition	automatic transfer for backup
Expandability	supports up to 3 Avalon HV hybrid inverters, up to 35 kW load
Warranty	10 years
Mechanical
Dimensions	35.4 x 22.2 x 9.45in (900 x 565 x 240mm)
Weight	55 lbs (25 kg)
Mounting Options	wall mount
Electrical Connections
Smart Load Control	12 positions. Control up to 12 single phase loads, 6 split phase loads, or any combination, up to 50A
Smart Load Control Modes	automatic, scheduled, or manual control
Ev Charging Smart Load Provision	up to 50A
Ac Coupling Smart Load Provision	up to 50A
Generator Smart Load Provision	up to 50A
Non-Backup Lug Connections	included
Environmental
Operating Temperature	-4 °F to 122 °F (-20C to 50C)
Operating Humidity	up to 100% condensing
Maximum Elevation	3000m (9,843 ft)
Environment	indoor and outdoor rated
Enclosure Type	NEMA 3R
Compliance & Certificates
Certifications	UL67, UL1741 PCS, UL869A, UL916
Emissions	FCC Part 15, ICES 003
Accessories (not included, unless otherwise noted)
Main Breaker	Eaton CSR2200N, 2pole/200A/25kAIC
PCS Inverter Grid Breaker (Included)	NDB2T-63, 2pole/200A/25kAIC
PCS Inverter Backup Breaker	Eaton BR260orBR2125, 1or2or3pole/60Aor125A/25kAIC
Other System Components (EV, AC Coupled Inverter, Generator)	based on component spec
Hold Down Kit	Eaton X-IQ-NA-HD-200A with screws

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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

Jacob B

Easy Process, Genuine Support

Patrick B

Off Grid Solar Purchase

James Martin

Highly Recommend

Brian H

Solar Kit for Mobile Work Van

Keith S

Best Tech Support

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