Delta M250HV Installation and operation manual

Solar inverter
M250HV_112 (Delta part number RPI254M112000)
Product version 0
Europe
Installation and Commissioning Instructions
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11

2Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
This manual applies to the inverter models:
●M250HV_112 (Delta part number RPI303M230100,
product version 0)
with Delta Service Software (DSS) version 6.0 or higher
The Delta part number and the product version can be
found on the type plate of the inverter.
Delta manuals undergo continuous revision in order to
provide complete information regarding the installation
and operation of its inverters. You should therefore always
consult solarsolutions.delta-emea.com before starting
installation work to check whether a newer version of the
Quick Installation Guide or the Installation and Operation
Manual is available.
© Copyright – Delta Electronics (Netherlands) B.V. – All
rights reserved.
This manual is intended for use by electrical installers who
are trained and approved for installation and commission-
ing of grid-connected solar inverters.
The information in this manual is to be treated as conden-
tial and no part of this manual may be reproduced without
prior written permission from Delta Electronics. The infor-
mation in this manual may not be used for any purpose not
directly connected to the use of the inverter.
All information and specications can be modied without
prior notice.
All translations of this manual that are not authorized by
Delta Electronics (Netherlands) B.V. must be marked with
the words "Translation of the original operating instruc-
tions."
Delta Electronics (Netherlands) B.V.
Tscheulinstrasse 21
79331 Teningen
Germany
Authorized representative for this product in the EU:
Delta Electronics (Netherlands) B.V.
Zandsteen 15
2132 MZ Hoofddorp
Netherlands
Information about the versions of this manual
Version Date Changes
1.0 2022-04-11 First edition for the product ver-
sion
Identication of the product and the product version
1
2
xxxxxxxxxxxx0
Product
version Identication of the product and the product version
0Delta part number

Serial Number
The last letter of the serial number
indicates the product version. Please
have the serial number to hand if you
would like to contact Delta Customer
Service.

Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Accessories/software to be ordered separately . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Components of the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Planning the installation site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lifting and transporting the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installing the inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Grounding the inverter housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Connecting the communications card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connecting a data logger using RS485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Connecting the grid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting the solar modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
LED status indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Rating plate and markings on the inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Table of Contents

4Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Safety instructions
Read this manual in full before starting work
on the inverter.
DANGER
Electric shock
Potentially fatal voltages are present in the
inverter during operation. When the invert-
er is disconnected from all power sources,
this voltage remains present in the inverter
for up to 150 seconds.
You should therefore always carry out
the following steps before working on the
inverter:
►Never disconnect the inverter from the
solar modules when it is under load.
1. Disconnect the connection to the grid
so that the inverter cannot feed energy
into the grid.
2. Turn all four DC isolating switches to
the OFF position.
3. Disconnect the inverter from all AC and
DC voltage sources. Make sure that
none of the connections can be re-
stored accidentally.
4. Wait at least 150 seconds until the
internal capacitors have discharged.
5. Ensure that the DC cables cannot be
touched accidentally.
DANGER
Electric shock
The inverter has a high leakage current
value.
►Always connect the ground cable rst,
then the AC and DC cables.
DANGER
Electric shock
In IT grids, a twofold insulation fault can
lead to high residual currents on the invert-
er housing.
►Ground the housing of the inverter via
the grounding connection.
►Set up a permanent insulation
monitoring system.
►The rst time an insulation fault occurs,
this insulation fault must be rectied
immediately!
DANGER
Electric shock
Potentially fatal voltages are present at the
DC connections of the inverter. When light
falls on the solar modules, they immedi-
ately start to generate electricity. This also
happens when light does not fall directly on
the solar modules.
►Never disconnect the inverter from the
solar modules when it is under load.
1. Disconnect the connection to the grid
so that the inverter cannot feed energy
into the grid.
2. Turn all four DC isolating switches to
the OFF position.
3. Disconnect the inverter from all AC and
DC voltage sources. Make sure that
none of the connections can be re-
stored accidentally.
4. Wait at least 150 seconds until the
internal capacitors have discharged.
5. Ensure that the DC cables cannot be
touched accidentally.
WARNING
Electric shock
IP66 protection degree is no longer guar-
anteed when the door is open.
►Only open the doors when absolutely
necessary.
►Do not open the doors if water or dirt
might enter the inverter.
►After work is completed, ensure that the
door is properly shut and the screws
tightened again. Check that the door is
properly sealed.
WARNING
Heavy weight
The inverter is very heavy.
►Lift and transport the inverter with suit-
able lifting equipment, such as a crane.
►At least three people are required to lift
and carry the inverter.

5
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Safety instructions
WARNING
Electric shock from the live inverter
housing
The inverter has a conductive metal hous-
ing.
►Always ground the inverter housing
before connecting the inverter to the
grid and solar modules.
►Always ground the inverter housing
before connecting the inverter to the
grid and solar modules.
►Always comply with local regulations
relating to grounding cable
requirements.
►To increase the safety of the system,
always use the grounding screw to
ground the inverter housing even
when this is not required by the local
regulations.
►The cross-section of the grounding
cable must be at least 6mm2(copper).
WARNING
Hot surfaces
The surface of the inverter can get very hot
during operation.
●Always wear safety gloves when touch-
ing the inverter.
NOTICE
Incorrectly dimensioned solar system
If the solar system is dimensioned incorrectly, this may
damage the inverter.
►When calculating the module string, always pay
attention to technical specications of the inverter
(input voltage range, maximum input current and
maximum input power, see "Technical Data").
NOTICE
Overheating of the DC connections
Exceeding the maximum input current can cause the
DC connections to overheat and result in a re.
►When dimensioning the module strings, always take
into account the maximum input current of the DC
connections (see "Technical Data").
NOTICE
Ingress of moisture
Moisture can enter via open DC connectors.
►To ensure protection degree IP66, close unused DC
connectors with the rubber plugs that are attached
to the DC connectors.
NOTICE
Working in freezing conditions
In frosty conditions, the rubber seal of the front door
can freeze to the enclosure, tear when opened and thus
become leaky.
►Before opening the front door, defrost the rubber
seal with some warm air.
►Open the front door slowly.
●To comply with IEC 62109-5.3.3 safety requirements
and avoid injury or material damage, the inverter
must be installed and operated in accordance with
the safety and operating instructions set out in this
manual. Delta Electronics is not responsible for
damage resulting from failure to follow the safety and
operating instructions set out in this manual.
●The inverter may only be installed and commissioned
by installers who have been trained and approved for
the installation and operation of grid-connected solar
inverters.
●All repair work on the inverter must be carried out by
Delta Electronics. Otherwise the warranty will be void.
●Warning notices, warning symbols and other mark-
ings attached to the inverter by Delta Electronics
must not be removed.
●To avoid the risk of arcing, do not disconnect cables
when the inverter is under load.
●To prevent damage due to lightning strikes, follow the
applicable regulations in your country.
●All external connections must be su󰀩ciently sealed in
order to ensure an IP66 protection degree. Seal any
unused connections with the cover caps supplied.
●Only equipment that complies with SELV (EN 60950)
may be connected to the RS485 interfaces.

6Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Package
Inverter
1 Inverter M250HV_112
For wall mounting (suspended)
1x Mounting plate 2x Mounting bracket + M12 screw, spring washer and
washer
For mounting the inverter on the wall For securing the solar inverter to the bracket
For connecting to the solar modules (DC connection)
30x Pair of Amphenol H4 Plus DC connectors for
4/6 mm2(H4CFC4D●MS and H4CMC4D●MS) 2x Mounting tool for DC plug
12x Support bracket for DC cables
For supporting the DC cables

7
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Package
►Check that the package is complete
and check all components for damage
before starting installation work.
►Do not use any damaged components.
►Contact Delta Customer Service if the
scope of delivery does not match the
description in this manual.
►Keep the packaging.
Documentation
1x Installation instructions in several languages 1x Safety instructions in several languages
Solar-Wechselrichter
M250HV
Produktversion 0
Deutschland Österreich SchweizBelgien
Installationsanleitung
M15A / M20A/ M30A
BG
Инструкции за безопасност
CS Bezpečnostní pokyny
DA Sikkerhedsanvisninger
DE Sicherheitsanweisungen
EL Οδηγίες ασφαλείας
EN Safety instructions
ES Instrucciones de seguridad
ET Ohutusjuhised
FI Turvallisuusohjeet
FR Consignes de sécurité
HR Sigurnosne upute
HU Biztonsági utasítások
IT Istruzioni di sicurezza
LT Saugumo nurodymai
LV Drošības norādes
NL Veiligheidsinstructies
NO Sikkerhetsanvisninger
PL Wskazówki dotyczące bezpieczeństwa
PT Instruções de segurança
RO Instrucțiuni de securitate
SK Bezpečnostné pokyny
SL Varnostna navodila
SV Säkerhetsanvisningar
TR Güvenlik talimatları
Miscellaneous
7x Screw caps
For sealing the screw thread for the carrying handles

8Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Accessories/software to be ordered separately
Mounting feet for oor mounting
The package includes 2 mounting feet (120 mm high) and
1 screw set for attaching the feet to the inverter. Screws for
securing to the oor are not included.
2 1
Carrying handles for transporting the inverter
4 carrying handles are required, which can be screwed
onto various points on the inverter.
4
Delta Service Software (DSS) for Windows PC
The inverters are commissioned and set up using the
Delta Service software, for which a Windows PC is
required. The Windows PC is connected to the inverters
using the RS485 interface.
Caution: A standard RS485 to USB adapter is required to
integrate the Windows PC into the RS485 bus.
Download link: https://solarsolutions.delta-emea.com/en/
Solar-Inverter-Support-171.htm
RS485 to USB adapter for connecting a Windows PC
to the RS485 bus
If you wish to connect a Windows PC to the RS485 bus
using a cable, a standard RS485 to USB adapter is also
required. Select the adapter to match the USB type on
your PC.
1

9
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Components of the Inverter
DC disconnectors for
MPP trackers 1 to 6
DC disconnectors for
MPP trackers 7 to 12
Screw thread for
carrying handle
Air outlet
DC connection panel for
30 module strings
Screw thread for
carrying handle
Screw thread for
carrying handle
Screw thread for
carrying handle
Air inlet (fan module
with 4 fans)
Connector vor
Sub-1G antenna
Label with assign-
ment of DC cables
Type label
View from behind
Mounting plate for
wall mounting
Wiring box for AC cable
and communication
cable
Cable gland for
AC cable
Cable gland for communication cable
List of components and connections

10 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Components of the Inverter
RS485 / 12 VDC
Digital inputs
External power-off
DIP switch for RS485
termination resistor
Cable gland for AC
cable
Cable gland for communication cable
AC terminal block
Communication card
Dry contacts
Surge protection device
Type 3
AC connection box and communication card

11
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Wall mounting
Dimensions
27
82
410412 182
797207
1004
547 131
44
117,5 50
625241
284
???
644
690
44

12 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Dimensions
Floor mounting
1004
579233
273 659 *)
100
150 min
340
310 *)
745
100
72
32
*) Mounting hole spacing
Fig. 4.1: Dimensions of the inverter for oor mounting
12,5
6
120
80
340
310
Fig. 4.2: Dimensions of the mounting feet for oor mounting

13
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Planning the installation site
Requirements for the wall, oor and mounting
system
►The inverter is heavy. The wall, oor and mounting
system must be able to bear the weight of the invert-
er.
►Always use the mounting plate supplied with the
inverter for wall mounting.
►Use mounting materials (dowels, screws, etc.) suit-
able for the wall or the mounting system, as well as
the weight of the inverter.
►Mount the inverter on a vibration-free wall to avoid
faults.
►When using the inverter in residential areas or in
buildings with animals, possible noise emissions can
be disturbing. Therefore, choose the installation loca-
tion carefully.
►Mount the inverter on a reproof wall.
Special notes on ground mounting
In principle, the inverter can be mounted directly onto the
ground or directly onto the roof in the case of roof systems.
If there is a risk of ooding (for example in
heavy rain) or snow drifts, you should install
the inverter in an elevated position.
Installation position
►Mount the inverter vertically.
Installation site
Outdoor installations
UV
The inverter has a protection degree of IP66 and can be
installed indoors and outdoors. Despite this, the inverter
should be protected by a roof against direct sunlight, UV
radiation, rain and snow.
For example, the power of the inverter will be reduced if it
heated excessively by sunlight. This is normal operating
behavior for the inverter and is necessary to protect the
internal electronics.

14 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Installation clearances and air circulation
Planning the installation site
> 400 > 800 > 600
> 265 > 265
> 120
Fig. 4.3: Minimum clearances for air circulation without considering the location of the DC cables
?? ??
> 1330
> 780 > ???
> 370
547
Fig. 4.4: Installation clearances for the mounting plates taking into account the minimum distances for air circulation Fig. 4.3

15
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Installation clearances and air circulation
Planning the installation site
►Ensure su󰀩cient air circulation. There must not be
heat buildup around the inverter.
►Refer to the Operating temperature range without
derating and the Total operating temperature range
(see "Technical Data").
When the operating temperature range without der-
ating is exceeded, the inverter reduces the AC power
fed into the grid.
When the Total operating temperature range is ex-
ceeded, the inverter stops feeding AC power into the
grid.
This is normal operating behavior for the inverter and
is necessary to protect the internal electronics.
If there is a loss of performance during operation, this
may be due to overheating of the inverter.
►Position multiple inverters so that they do not make
each other warmer.
Clearance to the oor
From the point of view of air circulation, the distance to the
ground does not matter. However, other factors must be
taken into account:
►Are the LEDs clearly visible?
►Are all components easily accessible for work? Also
take into account the space required for the use of
tools.
►Is there enough space to route the cables (especially
the AC cable)? Check the minimum bending radius of
the cables.
►Is ooding or snow drifting possible? In this case,
install the inverter in an elevated position.
Clearance to the front
The specied minimum clearances for air circulation apply
to installations that are open to the front, in other words
that warm air can escape to the front.
If you want to operate the inverter in a sealed box, you
must ensure that cold air is supplied and hot air is dissi-
pated e󰀩ciently. Have your ventilation plan checked by
Delta Customer Service to avoid problems during opera-
tion.

16 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Lifting and transporting the inverter
Lifting with 2 O-rings (M12) and lifting equipment
Manual lifting with 4 carrying handles (can be ordered separately).
Remove AC cable gland if right carrying handle is to be used.

17
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Installing the inverter
Wall mounting (suspended)
WARNING
Heavy weight
The inverter is very heavy.
►Lift and transport the inverter with suit-
able lifting equipment, such as a crane.
►At least three people are required to lift
and carry the inverter.
Always check with Delta Customer Service
rst if you intend to deviate from the instruc-
tions given in this section.

18 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Floor mounting (upright, optional)
Installing the inverter
The mounting feet for oor mounting must
be ordered separately. The mounting feet
are supplied with 2 screws, spring washers
and washers for mounting on the inverter.

19
Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Grounding the inverter housing
1. Attach the ground cable to one of the ground con-
nections at the bottom left or bottom right.
Size Torque Parts required
M12 24.5 Nm Screw, spring washer,
washer, toothed washer
M6 3.9 Nm
Table 4.1.:Size, torques and parts required for the ground con-
nections
2. Perform a continuity check of the grounding connec-
tion.
→If there is not a su󰀩ciently conductive connec-
tion, clean the contact surface on the grounding
screw or use a toothed washer if necessary.

20 Installation manual M250HV_112 (RPI254M112000) Product Version 0 EU V1.0 EN 2022-04-11
Connecting the communication card
∅ 10 mm
∅ 8,7 mm
∅ 7,2 mm
There is no need to remove the card for the
installation work. All connections are acces-
sible without its removal.
Check which approach suits you better.