Maxeon SunPower Reserve Setup guide

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice
SunPower
Reserve
Home energy
storage system
Safety & Installation Instructions
547143 Revision B
Published June 2023
This document is valid for installing the SunPower Reserve home energy system including:
• Inverter: RESERVE-INV-1-P5-L1-INT
• Battery: RESERVE-BAT-1-DC-10.1-INT
This document describes the mounting, installation, commissioning, conguration, operation,
troubleshooting and decommissioning of the products, as well as the operation of the product
user interface. The enclosed documentation is an integral part of this product. Keep the docu-
mentation in a convenient place for future reference and comply with all provided instructions.
Illustrations in this document are reduced to the essential information and may deviate from
the real product.
For the latest version please refer to
www.sunpower.maxeon.com/int/InstallGuideReserve
Contents are subject to change without notice.
Maxeon Solar Technologies, Ltd.
sunpower.maxeon.com

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 2
1.0 Introduction 5
1.1. Disclaimer of Liability 5
1.2. Open Source License
1.3 Levels of Messages 5
   
2.0 Safety 7
2.1. Intended Use 7
2.2. Safety Instructions for Battery 7
2.2.1. General Safety Precautions 7
2.2.2. Response to Emergency Situations 8
2.3. Important Safety Instructions 9
2.4. Symbols explanation 11
   
3.1. System Introduction 13
3.2. Inverter Description 14
3.2.1. Inverter Electrical Interface Introduction 14
3.2.2. Inverter Display Interface 15
3.3 Battery Description 17
   
3.4.1. DC-coupled Storage System 19
3.4.2. AC-coupled Storage System 20
3.4.3. Hybrid-coupled Storage System 20
4.0 Storage and Transport 21
4.1. Storage 21
4.2. Transport 22
5.0 Mounting 23
5.1. Checking the Outer Packing 23
5.2. Scope of Delivery 23
5.3. Included in the box 23
5.4. Preparing tools and instruments 25
   
   
5.6.1. Mounting the Battery 28
5.6.2. Mounting the Inverter 29
5.6.3. Mounting the Wi-Fi Module 30

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 3
   
   
   
   
6.3.1. Requirements for the AC Connection 33
6.3.2. Selecting Suitable AC circuit Breaker 34
6.3.3. Grid and Backup Connection 34
6.3.4. CT Rating 36
6.3.5. CT Connection 37
   
   
6.5.1. Electrical Connection Between the Inverter and First Battery 40
6.5.2. Communication cable connection 40
6.5.3. Power cable connection 41
6.5.4. Electrical connection for expansion batteries 43
6.5.5. Other Communication Connection of Inverter 44
   
   
7.0 Startup and Shutdown procedure 49
7.1. Startup procedure 49
7.2. Shutdown procedure 49
7.3. Checks before start-up 50
   
  
   
   
   
  
   
9.0 Maintenance and Troubleshooting 54
9.1. Routine Maintenance 54
9.2. Troubleshooting 54
9.2.1. Inverter Error Troubleshooting 55
9.2.2. Inverter Error Description 57
9.2.3. Battery Protection Description 59
9.2.4. Battery Error Description 60

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 4
  
   
  
   
   
   
  
  
   
12.1.1. Hybrid or AC coupled conguration (AUS) 66
12.1.2. DC coupled conguration (AUS) 67
  
12.2.1. Hybrid or AC coupled conguration (EU) 68
12.2.2. DC coupled conguration (EU) 69
   

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 5
TIP
1.0 Introduction
1.1. Disclaimer of Liability
This document is intended for qualied persons and end users.
Operations marked with a DANGER or CAUTION symbol may only be performed by qualied
persons. End users without specic qualications may perform any unmarked tasks.
Qualied persons must have:
• Knowledge of how an inverter works and is operated
• Knowledge of how batteries work and are operated
• Training on how to handle the dangers and risks associated with installing, repairing, and
using electrical devices, batteries, and installations
• Training on the installation and commissioning of electrical devices and installations
• Knowledge of the applicable laws, standards, and directives in installation region
• Knowledge of and compliance with this document, including all safety precautions
• Knowledge of and compliance with the documents of the battery manufacturer, including
all safety precautions
1.2. Open Source License
This product contains Open Source software, developed by third parties and licensed using
vehicles including GPL and/or LGPL. For more details, a list of Open Source software used and
the related license texts, please refer to the Licenses section on our Sunpower app and Maxeon
website ().
1.3. Levels of Messages
The following levels of messages may occur when handling the product
DANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
CAUTION indicates a situation which, if not avoided, can result in property
damage and/or minor to moderate injury.
TIP provides information for the optimal installation and operation of the
product.



© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 6

 Description
AC Alternating current
AUX Auxiliary
BAT Battery
BMS Battery management system
CT Current transformers
DC Direct current
DNSP Distributed network service provider
DRM Demand response mode
EMS Energy management system
INV Inverter
LED Light emitting diode
PV Photovoltaic
SOC State of charge

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 7
2.0 Safety
2.1. Intended Use
2.2. Safety Instructions for Battery

1. Overvoltage or wrong wiring can damage the battery pack and cause deagration, which
can be extremely dangerous.
2. All types of breakdown of the battery may lead to a leakage of electrolyte or ammable
gas.
3. Battery pack is not user-serviceable. There is a high voltage in the device.
4. Read the label with Warning Symbols and Precautions, which is on the right side of the bat-
tery pack.
 Intended use & installation requirements
SunPower Reserve system

• 

• 

• Current transformers or
electricity meters
The SunPower Reserve system is intended for installation in
residential homes to optimise self-consumption.
It is suitable for indoor and outdoor installation.
All components must operate in a scenario suitable for
their operation. Any use of the product(s) other than that
described in this section does not qualify as appropriate. Be
sure to use this product in accordance with the information
provided in the accompanying documents and in
accordance with local applicable standards and directives.
Any other operation may cause personal injury or property
damage. Alterations to the product, e.g. changes or
modications, are only permitted with the express written
permission of Maxeon Solar Technologies.
Unauthorized alterations will void guarantee and warranty
claims. Maxeon Solar Technologies shall not be held liable
for any damage caused by such changes.
The type label must remain permanently attached to the
product.
This document is an integral part of this product. Ensure
it is accessible for future reference and comply with all
instructions contained therein.


The inverter is used for bidirectional transfer between AC
current and DC current.
It must only be operated with PV arrays of protection class
II in accordance with IEC 61730, application class A. The PV
modules coupling capacitance must not exceed 1.0 μF.


The battery pack must only be used for energy storage with
a SunPower Reserve inverter.

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 8
5. Do not connect any AC conductors or PV conductors directly to the battery pack which
should be only connected to the inverter.
6. Do not charge or discharge damaged battery.
7. Do not damage the battery pack in such ways as dropping, deforming, impacting, cutting
or penetrating with a sharp object. It may cause a leakage of electrolyte or re.
8. Do not expose battery to open ame.

The battery pack is designed to prevent the danger caused by malfunction.
If an accident takes place on land, remove items away from the damaged battery pack and
segregate if it is possible do so safely and call local re department or service engineer.
If an accident takes place in water, stay out of the water and don‘t touch anything if any part
of the battery, inverter, or wiring is submerged. Do not use battery again and contact the tech-
nical support.
Scenario Recommended actions
If the battery shell is
damaged and user touches
the inner material of the
battery cells
1. ILeave the contaminated area
immediately and seek medical attention.
2. IRinse eyes with running water for 15
minutes and seek medical attention.
3. IWash the contacted area with soap
thoroughly and seek medical attention.
4. IInduce vomiting and seek medical
attention.

place where the battery
pack is installed

• FM-200, CO² or other suitable extinguisher on the battery
re.
• ABC re extinguisher could be used on other items, where
it won’t come in contact with the battery pack.

1. If re occurs when charging batteries, if it is safe to do so,
disconnect the battery pack circuit breaker to shut o the
power to charge.
2. If the battery pack is not on re yet, extinguish the re
before the battery pack catches re.
3. If the battery pack is on re, do not try to extinguish but
evacuate people immediately.
If battery back is burning
There may be a possible explosion when batteries are heated
above 150 °C. When the battery pack is burning, it leaks
poisonous gases. Do not approach.

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 9
High risk scenarios Recommended actions
Danger to life due to
electric shock when live
components or cables are
touched
There is high voltage in the conductive components or cables
of the inverter. Touching live parts and cables can result in
death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources and make
sure it cannot be reconnected before working on the
inverter or the battery pack.
• After disconnection, wait for 5 minutes until the capacitors
inside the inverter have discharged.
• Do not open the product.
• Wear suitable personal protective equipment for all
operations on the product.
Danger to life due to
dangerous voltages on the
battery pack
There is dangerous voltage at the pin connector for the power
cable. Reaching into the pin connector for the power cable
can result in lethal electric shock.
• Do not open the battery pack.
• Do not wipe over the battery pack with a damp cloth.
• Leave the protective caps on the pin connectors for the
batteries power connection until the inverter cables are
connected to the battery pack. Disconnect the system
from voltage sources and make sure it cannot be
reconnected before working on the inverter or the battery
pack
Danger to life due to
electric shock from
touching an ungrounded

• Touching ungrounded PV modules or array frames can
result in death or lethal injuries due to electric shock.
• Connect and ground the frame of the PV modules, the
array frame and the electrically conductive surfaces so
that there is continuous conduction.
• Observe the applicable local regulations.
Danger to life due to
electric shock when live

are touched
When PV panels exposed to sunlight, the PV array generates
high DC voltage which presents in the DC conductors.
Touching the live DC cables can result in death or lethal
injuries due to electric shock.
• Disconnect the inverter from voltage sources and make
sure it cannot be reconnected before working on the
device.
• Do not touch non-insulated parts or cables.
• Do not disconnect the DC connectors under load.
• Wear suitable personal protective equipment for all work
on the inverter.
Danger to life due to
electric shock when
touching live system
components in case of a
ground fault
When a ground fault occurs, parts of the system may still
be live. Touching live parts and cables can result in death or
lethal injuries due to electric shock.
• Disconnect the product from voltage sources and make
sure it cannot be reconnected before working on the
device.
• Touch the cables of the PV array on the insulation only.
• Do not touch any parts of the substructure or frame of the
PV array.
• Do not connect PV strings with ground faults to the
inverter.
2.3. Important Safety Instructions

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Specications included in this document are subject to change without notice 10
Cautionary scenarios Recommended actions
Risk of burns due to hot
heatsink and housing
The enclosure and cover of the inverter can get hot during
operation. During operation, do not touch any other than the
cover of the inverter.
Damage to the inverter due
to electrostatic discharge
• Touching electronic components can cause damage to or
destroy the inverter and the battery through electrostatic
discharge.
• Ground yourself before touching any component.
Damage due to cleaning
agents
• The use of cleaning agents may cause damage to the
energy storage system and its components.
• Clean the system and all its components only with a cloth
moistened with clear water.
High risk scenarios Recommended actions
Risk of chemical burns
from electrolyte or toxic
gases
During normal operation, no electrolyte would leak from the
battery pack and no toxic gases would form. Despite careful
construction, if the battery pack is damaged or a fault occurs,
it is possible that electrolyte may be leaked, or toxic gases
may form.
• Store the battery pack in a cool and dry place.
• Do not drop the battery pack or damage it with sharp
objects.
• Only set the battery pack down on its back or its bottom.
• Do not open the battery pack.
• Do not install or operate the battery pack in potentially
explosive atmosphere or areas of high humidity.
• If moisture has penetrated the battery pack (e.g., due to
a damaged housing), do not install or operate the battery
pack.
• In case of contact with electrolyte, rinse the aected
areas immediately with water and consult a doctor
without delay.

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Specications included in this document are subject to change without notice 11
Inverter Symbols 
Beware of a danger zone
This symbol indicates that the inverter must be additionally
grounded if additional grounding or equipotential bonding is
required at the installation site.
Beware of electrical voltage
The product operates at high voltages.
Beware of hot surface
The product can get hot during operation.
Danger to life due to high voltages in the inverter, observe a
waiting time of 5 minutes. Prior to performing any work on the
inverter, disconnect it from all voltage sources as described in
this document.
WEEE designation
Do not dispose of the product together with the household
waste but in accordance with the disposal regulations for
electronic waste applicable at the installation site.
Observe the documentation
CE marking
The product complies with the requirements of the applicable
EU directives.
Certied safety
The product is TUV-tested and complies with the requirements
of the EU Equipment and Product Safety Act.
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the applicable
Australian standards.
UKCA marking
The product complies with the regulations of the applicable
laws of England, Wales and Scotland.
RoHS labeling
The product complies with the requirements of the applicable
EU directives.
2.4. Symbols explanation

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 12
Battery Symbols 
Beware of a danger zone
This symbol indicates that the battery pack must be
additionally grounded if additional grounding or equipotential
bonding is required at the installation site.
Risk of chemical burns
Risk of explosion
Observe the documentation
Risk of electrolyte leakage
CE marking
The product complies with the requirements of the applicable
EU directives.
Refer to the instruction for operation
Use eye protection
Fire, naked light and smoking prohibited
Install the product out of reach of children
Do not dispose of the battery pack together with the
household waste but in accordance with the locally applicable
disposal regulations for batteries
Recycling code
 Marking for transport of dangerous goods
The product passes the certications of the UN38.3
Li-Ion

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Specications included in this document are subject to change without notice 13

3.1. System Introduction
Inverter
RESERVE-INV-1-P5-L1-INT
Battery
RESERVE-BAT-1-DC-10.1-INT
397mm 
 212mm


© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 14
3.2. Inverter Description

* All breaker and switch of the inverter are switched o when shipped.
** The DRM is only for regions with AS/NZS 4777.2 safety regulations.
Position Description
1Grid Connector
2Backup Connector
3Battery Positive Power Connector
4Battery Negative Power Connector
5Battery Circuit Breaker* of the Inverter
6Positive and Negative PV connectors, PV1/ PV2
7PV Switch*
8Wi-Fi Port
9 Communication (Ports CAN/RS485, BMS, LAN,
Meter/Grid-CT, DRM**, PV-CT, AUX)
10 Inverter LED










H
D W

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 15
3.2.2. Inverter Display Interface
Nine LED indicators are provided on the inverter display panel.
However, when the system is experiencing a fault, the combination of both upper and lower
LEDs are used to show error codes, such as:
 Description  Description

White light
The system works
normally

Red light
The system is in fault

White light
Meter Communication
works normally


Meter lost

White light
Battery works
normally


Battery is not working
normally
COMMS
White light
Server Connected
COMMS

Server Disconnected

The four system LEDs provide information
about status and operations of the system

Five LEDs are used to indicate the state of
charge of the battery(ies) in normal operation

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 16
The inverter lights will also operate dierently during the software downloading and upgrading
process:
The lower LED indicators on the front cover of the inverter provide information about the State
of Charge (SOC). If all batteries are operating normally, they will display solid white or o.
During the various states of charge, the lights will display:
Light During the software downloading and upgrading process
Inverter light display While the inverter is downloading the le to update its
rmware, the lower 5 LEDs will ow from both sides to the
middle. When the download process has completed and the
upgrade process begins, the lower 5 LEDs will ow from the
middle to the two sides.
Battery light display The number of lights from left to right is 1-3. During
upgrading, No. 3 white light is ashing fast, other two LEDs
are o.
 Description
SOC≤5.2%
5.2%<SOC≤9.5%
9.5%<SOC≤25.2%
25.2%<SOC≤50%
50%<SOC≤75.2%
75.2%≤SOC≤100%

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 17
3.3 Battery Description
Battery pack appearance and dimensions:
Connection area overview:


250mm
212mm

  







© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 18

The three LED indicators on the front cover of the battery provide information about the SOC
operational status of the single battery with lights displaying solid white or ashing:
Position Description
1Battery Start Button
2Battery Circuit Breaker
3Battery LED Display
4Battery+ Power Connector
5Battery- Power Connector
6Grounding terminal
7BMS COM (1)
8 BMS COM (2) (with terminal resistor)
 Description
SOC≤10%
10%<SOC≤30%
30%<SOC≤50%
50%<SOC≤60%
60%<SOC≤90%
90%<SOC≤100%

© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 19

The SunPower Reserve system is a exible storage system that can be applied in all of the
following scenarios:
An example of each of these scenarios:
3.4.1. DC-coupled Storage System
 Description 
DC First-time PV array install
Hybrid inverter will run both
solar and battery
No additional inverter needed
 A PV array was previously
installed or the PV array is
using microinverters. The
system will be composed of
dedicated inverters for solar
and battery
• Loads can be drawn
from battery and PV
simultaneously
• Battery system can be
retrot
Hybrid A PV array was previously
installed and a new PV array
is added as a separate
system; Hybrid inverter will
run new solar and battery
• Can be coupled to any
existing PV system
• Increase system size and
control without altering
original PV system
 
Backup loads



© 2023 Maxeon Solar Technologies, Ltd. All rights reserved. | 547143 Revision B - June 2023
Specications included in this document are subject to change without notice 20

3.4.3. Hybrid-coupled Storage System


 
Backup loads





 
Backup loads
