solarwatt MyReserve 25 Series User manual

MyReserve 25
DE
EN
IT
Benutzerhandbuch
User Manual
Manuale di istruzioni per l‘uso

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Content
Congratulations on purchasing your MyReserve.............................20
General information .......................................................................20
About this guide ................................................................................................................................ 20
Scope of validity ................................................................................................................................ 20
Limitation of liability ........................................................................................................................ 20
Intended use....................................................................................................................................... 20
Requirements for installers ............................................................................................................ 20
Safety notices .................................................................................21
Warranty and FullCoverage* all-risc-insurance...............................22
Product description ........................................................................22
Components and layout................................................................................................................... 22
Characteristics of MyReserve ......................................................................................................... 23
Charging behavior ..........................................................................25
Direct supply from PV....................................................................................................................... 26
Direct supply from PV and charge battery................................................................................... 26
Direct supply from PV, charge battery, infeed ............................................................................ 26
Direct supply from PV and discharge battery............................................................................. 26
Discharge battery only (night mode)............................................................................................ 27
Winter operation (unconditional charging)................................................................................. 27
Sleep mode ......................................................................................................................................... 27
MyReserve operation......................................................................28
Temperature behaviour.................................................................................................................... 28
LED indicators for Status.................................................................................................................. 29
MyReserve Monitoring....................................................................30
Via MyReserve App............................................................................................................................ 30
Via network integration with the EnergyManager..................................................................... 31
Troubleshooting .............................................................................32
Critical states...................................................................................................................................... 32
Fireghting measures ....................................................................................................................... 33
Instructions for reghting measures .......................................................................................... 33
FAQ .................................................................................................33
Disposal..........................................................................................34

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Congratulations on purchasing your MyReserve
Thank you very much for selecting a SOLARWATT product.
With more than 20 years of production experience under
its belt, SOLARWATT GmbH is one of the pioneers of the
German solar industry.
The MyReserve battery storage system rounds out
SOLARWATT’S systemic concept. In choosing the MyRe-
serve, you have selected an innovative and high-quality
member of the SOLARWATT product family. The MyReserve
represents the advantages of secure, highly ecient and
standardized battery technology. All modules work in per-
fect harmony with one another.
General information
About this guide
This user handbook is designed for end users of a MyReser-
ve battery storage. It contains an overview of the most im-
portant characteristics and functionalities as well as expla-
nations of operation and charging behaviour. In addition,
you will learn how you can view and monitor the operation
of your storage and what must be observed in the event of
a technical problem and for disposal.
Read this user guide carefully and store it near the MyRe-
serve.
Scope of validity
This user guide is valid for the MyReserve 25, manufactu-
red by SOLARWATT GmbH.
Limitation of liability
SOLARWATT GmbH assumes no liability for injury to per-
sons, damage to the product or other property, or conse-
quential damage resulting from non-compliance with this
user guide. The company also assumes no liability for da-
mage to the product that results or has resulted from im-
proper usage of the product, or from any actions taken by
non-qualied, non- SOLARWATT-certied electricians.
All unauthorized modications or techni-
cal alterations to the product are forbidden.
© SOLARWATT GmbH 2020
Intended use
The MyReserve is designed exclusively for storing electri-
cal energy generated by PV systems, and should be used
for this purpose alone. Using the MyReserve improperly
or for purposes other than the intended one can result in
product malfunctions and/or life-threatening conditions or
situations, and renders the warranty null and void.
Requirements for installers
The MyReserve may only be installed and commissioned
by trained professionals who fulll the following criteria:
• Authorized by SOLARWATT
• Trained electronics technicians, electricians or other
specialists with similar qualications.
• Authorized professionals with thorough knowledge of
all applicable standards, directives and laws
• Specialists who have taken part in one of SOLARWATT
GmbH’s MyReserve certication courses.

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Safety notices
• The MyReserve battery storage system may only be
commissioned by trained electricians with specic
SOLARWATT training. There is a risk of electric shock.
• For maximum safety, install DC-side lightning and sur-
ge protection between the PV system and MyReserve.
• Animals, children, persons with reduced physical,
sensory or mental capacities, and persons lacking
sucient experience and knowledge must not be left
unattended in the vicinity of the device.
• Make sure that the device is properly attached to the
wall.
• Do not clean the unit with alcohol or other chemical
agents. In the process, follow the instructions in chap-
ter “Cleaning / care and maintenance”.
• The maximum current and voltages characteristics ac-
cording to the data sheet specications of the respec-
tive product must be observed. Otherwise, the product
can be damaged.
• Only use spare parts and accessories that are appro-
ved or recommended by SOLARWATT.
• Always observe all applicable national standards and
directives for connection of battery storage systems.
• Repairs or system updates must be carried out by qua-
lied personnel who are authorized and trained by
SOLARWATT.
• Electrical cables must be protected from improper use
so that no damage can occur due to twisting, clamping
or similar abuse. Do not use cracked or frayed electri-
cal cables or plug connectors. Inspect electrical cables
from time to time for damage and immediately decom-
mission them if any defects are found.
• Never ground the MyReserve with a lightning conduc-
tor, telephone wire or gas line.
• The temperature of the MyReserve Command housing
can increase to over 60°C.
• The product must not be disposed of with the house-
hold waste. The applicable disposal regulations in the
respective country must be observed.
• Do not dispose of battery modules by burning them!
• Do not open or damage battery modules. Do not touch
any electrolyte that has leaked from the battery; it is
harmful for the skin and eyes and can be toxic.
• Remember that charged capacitors pose an electrical
hazard. A discharge time of 5 minutes must be obser-
ved after shutting down MyReserve Command before
work on the device can take place.
DANGER
Damage due to incorrect handling!
Failure to comply with the following instructions regarding device usage and handling can result in dan-
ger to life and limb and/or property damage to the product and other equipment; SOLARWATT assumes
no liability for such hazards.
CAUTION
To avoid personal injury and/or property damage as a result of maintenance by unqualied persons, only
qualied installers who are trained and certied by SOLARWATT may perform service and maintenance
work on the MyReserve.
CAUTION
Be aware that there may still be voltage at the PV terminals while the PV system or inverter is being tested,
even if the DC cut-o switch has been turned o.
Battery modules must only be replaced by specialists who have received training in battery handling. This
work may only be carried out with the requisite level of caution.
Module batteries may only be replaced with identical battery modules from SOLARWATT.

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Warranty and FullCoverage* all-risc-insurance
SOLARWATT products are unique in their quality. This is not
just a promise and allows us to oer you extensive guaran-
tees and free insurance for your MyReserve.
In order for the warranty and FullCoverage to be valid for
your MyReserve, your certied installer activates warranty
and *insurance at www.solarwatt.com. You will then recei-
ve an e-mail conrming activation. After activation you will
automatically receive customer information and the *as-
sociated insurance policy from AON Versicherungsmakler
Deutschland GmbH by post after 2 to 3 weeks.
After the MyReserve has been commissioned, your installer will hand over the commissioning log to you. This conrms
that all installation conditions have been complied with correctly. Keep the completed commissioning report in a safe
place.
Product description
Components and layout
1 MyReserve Command Cover (optional cover)
2 MyReserve Command 25 (converter)
3 MyReserve Pack (battery module)
4 Wall bracket
5 MyReserve Anti Theft Set (optional)
6 MyReserve wiring harness
7 MyReserve protective cover
8 AC-Sensor Flex
1
2
3
4 5
6 7
1
2
3
4 5
6 7
8
* FullCoverage insurance is available only in selected countries.
NOTE
Make sure that the following documents are sent to you after installation.
Commissioning log completed by the installer
Warranty activation email
FullCoverage insurance policy (2-3 weeks after registration)

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1
2
3
4
5 6 7
Label
1STATUS Status LED/
Bluetooth antenna
2DC ON / DC OFF DC disconnector
3INV (+) Inverter positive terminal
4PV (+) PV string positive terminal
5PV (-) PV string negative terminal
6INV (-) Inverter negative terminal
7AC POWER AC power supply switch
Characteristics of MyReserve
More usable solar energy
V (photovoltaic) modules produce direct current (DC) and
batteries store electricity in DC as well. Households, howe-
ver, use alternating current (AC). The DC power must
be converted to AC power and this conversion is performed
by the inverter. Electricity from the roof goes through
an inverter and is converted into alternating current. If it
is sent to a conventional battery, it is converted back into
direct current. Then as the battery discharges the current
must be converted once again to alternating current. With
each conversion you lose some of your precious solar po-
wer. MyReserve, on the other hand, is installed before the
inverter. It stores the direct current from the PV system.
Only when the electricity is consumed in the household is
it converted into alternating current. This leaves over 90 %
of your own solar power available – that pays o!
PV-Anlage Speicher Wechselrichter Verbraucher
PV-Anlage Wechselrichter Speicher Verbraucher
90%
usable energy
75 %
usable energy
PV panels Inverter Battery Household
appliance
STANDARD BATTERY
PV-Anlage Speicher Wechselrichter Verbraucher
PV-Anlage Wechselrichter Speicher Verbraucher
90%
usable energy
75 %
usable energy
PV panels InverterMyReserve Household
appliance
MYRESERVE
higher conversion losses = less usable energy optimal integration of MyReserve = more usable energy
Highest reaction speed
In the best case, battery storage systems react without
delay to changes in solar power generation or household
consumption. Many electrical appliances only draw power
for a few seconds. So if in reality it can take several seconds
for a battery storage device to react to such changes, the
charging and discharging capacity of the battery will lag
behind the real power balance. Until the storage device
delivers energy, the devices consume expensive mains po-
wer. This has a long-term impact on the eciency of the
battery. MyReserve is programmed for a very high response
speed, so that it can really serve the power requirements
eciently. MyReserve therefore has a reaction time 10
times faster than other systems. This means increased po-
wer consumption and maximum eciency. MyReserve re-
gisters the power demand immediately and delivers stored
energy almost in real time. Thus less power from the mains
is needed.

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Long service life and warranty
The charging and discharging processes are intelligently
controlled via the battery management system in your My-
Reserve. This increases the service life of the MyReserve.
SOLARWATT can therefore give you a 10-year performance
guarantee on the battery modules. If their usable energy
content falls below 80 %, SOLARWATT will cover the costs
of replacement, transport, installation and removal. Du-
ring this period, the warranty covers an unlimited number
of cycles (one-time complete charging and discharging).
SOLARWATT also oers a 10-year product warranty on the
power electronics of your MyReserve. The additional free
FullCoverage* covers the risk of mains overvoltage, light-
ning, theft and ooding for 5 years.
Individuality through modularity
MyReserve ts your requirements because its modular
design allows it to be congured individually. Five battery
modules can be connected per MyReserve Command:
5x 2.4 kWh = 12 kWh usable energy content
5x 900 Watt = up to 4,5 kW charge/discharge power
You need more capacity? MyReserve can be expanded as a
cluster to a storage system with up to 72 kWh usable ener-
gy content.
Cluster:
Combination of up to 6 MyReserve
Commands with 1-5 MyReserve Packs
with one AC-Sensor
2,4 kWh
7,2 kWh
1h 13h 4,5h
12 kWh
ANWENDUNGSBEISPIELE SPEICHERKAPAZITÄT MYRESERVE
1h 13h
1h 13h 4,5h 1h 1,5h
The capacity of electricity storage batteries is expressed in kilowatt hours (kWh). 1 kWh means that the
battery could power a device with an output of 1,000 watts for 1 hour. However, most devices require much
less than 1,000 watts. Here are a few examples of how much energy your battery can provide:
WHAT CAN YOU POWER WITH YOUR BATTERY?
2.4 kWh
7.2 kWh
12 kWh

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Charging behavior
Your SOLARWATT photovoltaic system produces electrici-
ty throughout the day. MyReserve stores the extra energy
your household does not consume directly, and makes it
available when the sun is not shining.
Extra PV energy is used to charge your
MyReserve.
PV energy is
consumed directly.
Stored PV energy is used
when the sun is not shining.
Stored PV energy is used
when the sun is not shining.
Charge management “fully charged at sunset”Energy consumption of the household
MyReserve determines the optimum charging and dischar-
ging times using a self-learning algorithm that processes
energy generation and energy consumption in the house-
hold. This is because if the battery switches to “charging”
early in the day, it may remain at maximum charge for large
parts of the day. The cells age faster and the lifespan of
the battery is reduced. The charging strategy of MyReserve
therefore aims to ensure that the 100% charge state is not
reached until shortly before sunset. MyReserve “learns”
from the yield and consumption data of the last seven days
and then optimizes the charging behavior. The graph shows
a comparison of the charging curve of conventional batte-
ries and the MyReserve.
05:00 12:00 18:00
State of Charge
Time
100 %
95 %
50 %
Chemical stress dramatically
speeds up the battery‘s
aging process.
MyReserve
conventional battery

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Depending on the situation, MyReserve switches among
the following types of functions:
1. Direct supply from PV
2. Direct supply from PV and charge battery
3. Direct supply from PV, charge battery, infeed
4. Direct supply from PV and discharge battery
5. Discharge battery only (night mode)
Direct supply from PV
When your household requires exactly as much power as
your PV system is supplying (1 kW household, 1 kW gene-
rated), you need neither purchase energy from the public
grid (0 kW electricity purchase) nor feed it into the grid (0
kW infeed).
All of the energy produced is used directly (1 kW internal
consumption); MyReserve neither charges nor discharges
(0 kW battery charge/discharge).
This constellation is typical during early morning or late
evening hours.
Direct supply from PV and charge battery
If the PV system generates more energy than your house-
hold requires (2 kW generated, 1 kW household), the My-
Reserve will begin charging automatically (1 kW battery
charge).
The system will automatically adjust how the MyReserve is
charged in accordance with the charging strategy.
This constellation is typical around midday on sunny days.
Direct supply from PV, charge battery, infeed
In the example shown, 1.5 kW of energy are fed into the
MyReserve. If more energy is produced (3 kW) than can be
stored (1.5 kW) or used by the household (1 kW household),
the excess electricity is fed into the public power grid (0.5
kW infeed).
This constellation is typical on, for example, sunny after-
noons.
Direct supply from PV and discharge battery
The power generated by the PV system (1.0 kW) is less than
what the household requires (2.0 kW). MyReserve dischar-
ges the electricity needed to cover household needs (1.0
kW).
This constellation is typical for late afternoons.

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Discharge battery only (night mode)
Whenever the PV system is incapable of generating power,
the necessary electricity is primarily drawn from the My-
Reserve. Only a small fraction must be purchased from the
power company. This constellation is typical for nighttime
operations.
Winter operation (unconditional charging)
If the MyReserve is completely discharged, i.e. a cell in the
MyReserve Pack reaches the minimum permissible voltage,
it will be unconditionally charged until all cells in the MyRe-
serve Pack have reached a minimum voltage.
This unconditional charging takes place up to a SoC (State
of Charge) of 20 %. Until this value is reached, no discharge
is possible. Only when the SoC of 20 % has been exceeded
discharging can start again.
The charging takes place with at least 50 % of the PV po-
wer. If the AC sensor measures a feed into the grid, i.e. the
household uses less than the remaining 50 % of the PV
power, MyReserve is additionally charged with this surplus
until a predened state of charge is reached.
The unconditional charging serves as deep discharge pro-
tection for the battery cells and contributes to an extension
of the product life.
Sleep mode
If no electricity can be generated over a longer period of
time, for example because the PV system is covered in
snow, the MyReserve switches into energy-saving mode in
order to prevent deep discharge of the battery modules.
This mode, known as Sleep Mode, helps ensure optimal
protection of the battery modules. The battery modules will
remain capable of switching back into normal operating
mode easily and automatically for a period of ve months. If
this ve-month time limit is exceeded, the battery modules
can be re-activated by a service technician.

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MyReserve operation
Temperature behaviour
MyReserve is not actively cooled and is therefore main-
tenance-free. There are no disturbing noises and the ope-
ration of the storage unit does not require any additional
energy through cooling. The MyReserve Command cools
down via the surface of the aluminum housing and trough
the room temperature.
A heat development of 60°C can occur on the MyReserve
Command.
NOTE
• There are no limitations on performance for the household in the range from appr. 0°C to appr. 30°C.
• While charging there is a power throttling on appr. +10°C and colder to zero at appr.-2°C.
• Operation does not take place below appr. -15°C or above appr. +45°C.
• Accelerated aging of the cells should be expected at temperatures above appr. +45°C.
-15 0 30 45
°C

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LED indicators for Status
The bottom side of the MyReserve has LED indicators for
Status and Performance. Check the indicators at any time
for information regarding device status and current char-
ging state. See chapter “Troubleshooting” for information
on what to do in case of malfunctions—that is, if the Status
LED lights up red or red/yellow. The illustration shows you
the dierent possible LED indicators and what they mean.

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MyReserve Monitoring
There are two ways to visualize and monitor MyReserve data:
1. via MyReserve App
2. via with the EnergyManager from SOLARWATT - monitoring of all energy ows in the household and comprehensive
energy management
Via MyReserve App
MyReserve App für iOSMyReserve App für Android
Instructions for setting up the MyReserve App are available in the download area of www.solarwatt.com. With the MyRe-
serve App customers can see:
• the generation of the PV string connected to MyReserve
• the charging and discharging power of the MyReserve
• the SoC (State of Charge)
• the feed-in power or the supply from the grid
NOTE
The performance data of MyReserve is transmitted via your router. Changes to your network settings can lead
to incorrect displays in the app.

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Via network integration with the EnergyManager
If you are using your MyReserve in combination with the
EnergyManager, you can access the EnergyManager Portal
to view and evaluate all energy ows within your house-
hold in real time.
MyReserve transmits energy data, such as electricity input
and output or charging status, to the EnergyManager. The
EnergyManager Portal visualizes data over the course of
the day for the current day as well as all previous days and
gives you detailed information on electricity generation
and consumption, or device charging and discharging, at
any time.
By using the QR code above or via the website www.solar-
watt.com, menu item Energy Management, you can get to
know and test the EnergyManager Portal.
The charging strategy of the MyReserve is designed
for the longest possible service life. This results in
3,000 kWh more free solar power over the entire li-
fetime. Sudden changes in the weather can hinder the
planned full charge at the latest possible time. This can
be avoided immediately by including weather data.
Weather phenomena are strongly location-dependent,
sometimes a few hundred meters decide on precipita-
tion or temperature. Specic data of the PV system such
as orientation, inclination and location are saved in the
EnergyManager settings. In conjunction with a daily we-
ather report for the region, the intelligent control centre
can use this data to calculate an accurate yield forecast.
Ask your SOLARWATT installer! He will set up your Energy-
Manager Portal login.
Scan the QR code to get to know the
EnergyManager Portal!

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Troubleshooting
The MyReserve’s Status LED will light up red or red/yellow
to indicate any malfunctions. Under certain circumstances
(and after consulting with your installer), some error codes
can be resolved by simply restarting the system manually.
To do this, interrupt the power supply to the MyReserve
using the switch on the bottom of the MyReserve Com-
mand (see gure under „Components and construction“:
AC power supply switch) wait 60 seconds, then switch the
AC power on again.
Critical states
If any of the following critical situations develop, open a window, immediately leave the installation location, close the door,
and then call the emergency services.
Warning of re-
explosive substances
Warning of danger
from batteries
Warning of potentially
explosive substances
• Electrolyte leaking out
• Strong, pungent smell
• Development of smoke
• Storage battery burning
Immediately leave the installation location and then call
the emergency services
UK: 999/112
AUS: 000
NOTE
After a restart of MyReserve, an initialization with calibration and check of the start conditions takes place (a
PV-surplus must be measured once).
Unloading will not occur until the following day after MyReserve has detected a minimum surplus of PV energy.
DANGER
Defective batteries can result in harmful or even fatal hazards.
Shouldyoudiscoverone or moredefective battery modulesleakingelectrol-
yte and/or emitting an unpleasant smell, contact SOLARWATT immediately.
Do not approach the battery modules under any circumstances.
Defective batteries can cause explosions. They represent a danger to life
and limb.

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Fireghting measures
In the event that the battery is exposed to excessive heat
such as an external re, observe the following:
The battery’s primary products of combustion are carbon
dioxide (CO2) and water vapor (H2O). Signicantly smaller
quantities of carbon dioxide (CO), hydrouoric acid (HF)
and other gaseous intermediate products are released as
well. Dusts of nickel oxide, cobalt oxide, manganese oxide
(with NMC cells) must also be taken into account.
Unsuitable extinguishing agent: Water jets, Type D extin-
guishers
Suitable extinguishing agents: Sand, dry extinguishing
powder, carbon dioxide, Type PM12i metal re extinguish-
ers.
If the battery is exposed to re but is not yet burning, water
is a suitable extinguishing and cooling agent. However be
aware of using water on anything still conducting electrici-
ty otherwise there is a risk of electrocution.
Instructions for reghting measures
1. As long as the battery has not yet overheated, the sys-
tem can be cooled down using carbon dioxide or a jet
of water, provided that the following warnings are kept
in mind.
2. When extinguishing with water or other electrically
conductive extinguishing agents avoid direct contact
with exposed metal parts and cable cores, there is a
risk of electric shock from DC voltage of up to 1.000 V
and AC voltage of up to 230 V.
3. Do not inhale fumes, or use a self-contained breathing
apparatus. If possible, wear a full protection suit.
4. The battery’s heating value is approximately 140 MJ.
FAQ
What do I do once the battery modules reach the end of
their lifespan?
Contact your local SOLARWATT certied installer or
SOLARWATT oce. SOLARWATT will then take care of dis-
posing of the batteries.
Important: The battery modules should not be disposed of
as household waste.
Can the MyReserve specically store PV energy genera-
ted during midday peak production hours?
The MyReserve battery storage system uses a self-learning,
intelligent algorithm to analyze household energy produc-
tion and consumption, and uses that information to learn
when and how much surplus electricity will be available
to charge the battery. The charging process is distributed
over the course of the day and completed at sunset, which
is particularly gentle on batteries and thus maximizes their
service lifespans. If additional surplus energy is available,
as is typically the case around midday, it is advisable to ac-
tivate the intelligent infeed optimizer on the EnergyMana-
ger and automatically switch on electricity consumers such
as immersion heaters or pool pumps.
If the MyReserve fails, will the photovoltaic system stop
producing electricity?
No. In most cases, the photovoltaic system will continue
operating as usual. The PV system and PV inverter will only
be disconnected from one another if and when you acti-
vate the DC circuit breaker integrated into the MyReserve.
In some circumstances, however, overcurrents (due to un-
der-load activation of the DC circuit breaker, for example)
may trigger the MyReserve’s internal fuse, which will cut
the power supply to the PV inverter.
What does MyReserve initialization involve?
After the MyReserve has undergone initial commissioning/
recommissioning and the battery relay has been opened,
the system will be initialized to check whether minimum
switch-on conditions are in place. Initialization is com-
pleted when the following conditions are fullled simul-
taneously without interruption for 30 seconds: Voltage
on connected PV string >120 V, current on connected PV
string >0.3 A.
The MyReserve will only be permitted to begin CHARGING
or DISCHARGING following successful initialization. This
‘Commissioning’ validation occurs each day.
What algorithm is used to determine how the MyReserve
is charged?
Li-ion batteries age more quickly when fully charged. To
optimize battery life, the MyReserve uses a self-learning
charge algorithm under which the batteries only nish
charging shortly before sunset. In some circumstances, this
may mean that the MyReserve does not use the rst energy
surpluses in the morning to charge the battery.
Does MyReserve sometimes show no clear operating state?
The CHARGE/DISCHARGE operating status is indicated by
a sequential light of the PERFORMANCE LED. At 0% - 20%
charge level, only the rst PERFORMANCE LED is lit so no
sequential light can visualize the CHARGE/DISCHARGE state.

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Disposal
MyReserve may not be disposed of with the household
waste. Particular care must be taken when disposing of the
MyReserve and it’s batteries. For information regarding
safe and environmentally friendly disposal of your MyRe-
serve or batteries contact your SOLARWATT certied in-
staller who will dismantle the storage system and contact
SOLARWATT to arrange for pickup and disposal of the bat-
tery modules.