Vitovolt 300

Photovoltaic packages

In order for a photovoltaic system to run efficiently, it must be correctly sized. Viessmann offers photovoltaic systems in various packages to suit all requirements. You can find out which one is right for you here.

Simple system design
Everything from a single source
Quick installation
System guarantee from Viessmann

Your local Viessmann trade partner can provide you with personalised advice

Find a trade partner now
Simple system design

According to energy consumption, taking the number of people in the household into account

Area matrix

To check the required roof area

Everything from a single source

Matching system components for straightforward installation and commissioning

Quick installation

Through fully wired components

Flexible application

Standard delivery for all module arrangements enables flexible application

Increase self-sufficiency

With power storage units matched to the system

System guarantee from Viessmann

For the photovoltaic modules, installation system and inverter

House with a Vitovolt 300 photovoltaic package with 10 modules on the roof

Viessmann photovoltaic packages – Find the right system

A Viessmann photovoltaic system not only includes the photovoltaic modules (or PV modules for short), but also an inverter that converts the generated direct current into alternating current, and the installation system. The components are perfectly matched. For additional efficiency, you can expand the system to incorporate power storage systems or a Viessmann heat pump. This also enables a higher level of self-consumption. The decision to install a power storage unit and/or a heat pump has a significant influence on the size of the system. These factors must be taken into account in advance in order to find the right Viessmann photovoltaic package to suit you and your individual requirements. You will find support with this from our Viessmann trade partners. They offer comprehensive services from planning and design to delivery and service.

Which Vitovolt  300 photovoltaic packages are available?

The Vitovolt  300 photovoltaic packages are based on size, output and number of modules. You can find out which package is suitable for you by answering the following questions.

Important  – the standard delivery of the listed PV packages includes the following:

  • Vitovolt  300 photovoltaic modules (allblack, 390  Wp), Mono Standard and blackframe variants on request
  • Above roof installation system for pitched roofs
  • Single layer version on a tiled roof, rafter spacing 0.80  m, snow load zone  2 up to altitude 300  m, wind load zone  2 up to building height 10  m, roof pitch 35° to 65°)
  • SMA inverter
  • PV connecting cables (pre-assembled MC4)
Vitovolt  300 PV packagePhotovoltaic output in kWp
XS4.68 kWp
S6.24 kWp
M7.02 kWp
L7.80 kWp
XL9.36 kWp
XXL10.92 kWp

Vitovolt 300 PV packages incl. Vitocharge VX3 and GridBox

Packages consisting of PV, power storage unit
and energy management
Recommended for household electricity consumptionup to 4500 kWhup to 5500 kWhup to 6500 kWhup to 7500 kWhup to 8500 kWhup to 10000 kWh
Photovoltaic output4.68 kWp6.24 kWp7.02 kWp7.80 kWp9.36 kWp10.92 kWp
Battery capacity4.0 kWh4.0 kWh4.0 kWh8.0 kWh8.0 kWh12.0 kWh
Battery module, Type 4.8A111223
Energy Meter
GridBox 2.0

Included in the delivery

  • Vitovolt 300 photovoltaic modules (allblack mono, 390 Wp), Mono Standard and blackframe variants on request
  • Above roof installation system for pitched roofs
  • Single layer version on a tiled roof, rafter spacing 0.80 m, snow load zone 2 up to altitude 300 m, wind load zone 2 up to building height 10 m, roof pitch 35° to 65°)
  • Vitocharge VX3 (with packages L, XL and XXL additionally SMA inverter)
  • PV connecting cables (pre-assembled MC4)
  • Viessmann GridBox 2.0 energy management system incl. E-Meter 2.0

What factors determine the size of the photovoltaic system?

The size of a photovoltaic system is primarily based on the electricity demand of a house. If the electricity demand and the size of the system are matched, an optimum supply of self-generated power from the photovoltaic system is possible. Independence from rising electricity costs and self-sufficiency from central energy production are the result.

The following four questions can be used to determine the appropriate size of the photovoltaic system:

Power consumption is largely determined by the number of people living in the household. By selecting the number of people, you can determine the average household electricity demand and thus the appropriate package using the adjacent table. If you know your average electricity consumption, you can also use this as a guide to find the right size of PV package.

Simple system design according to energy consumption based on the number of people in the household

Number of occupantsHousehold electricity consumption/yearphotovoltaics onlywith heat pumpwith fuel cell


up to approx. 4500  kWh





up to approx. 5500  kWh





up to approx. 6500  kWh





up to 7500  kWh




from 5

up to 8500  kWh




from 5

from 1000  kWh




We have highlighted the answer "There are 4 people living in my household" in the table as an example.  

Having a heat pump increases the amount of photovoltaic power that can be used on site. A larger system should be selected due to the additional electricity demand.  If a fuel cell additionally provides self-generated electricity, the PV system can be selected in the smallest size.

If you answer "Yes" to the question about an additional heat pump, choose a larger photovoltaic package according to the table. If we assume a 4-person household with an average electricity consumption of 4500  kWh, it would have to be the L version of the Viessmann PV package.

The matrix shows an example of the suitable package for the available roof area: vertical axis height and horizontal axis width of the roof in meters.

First calculate the available roof area that is free of shading (width x height). Transfer this data into the matrix above. Based on this, you can read off the maximum possible package size for your roof area.

We have highlighted an example here too: "The available roof area is 7.5 m (width) x 7.0 m (height)." Consequently, this means that an M package is the maximum suitable version for this roof.

Check the required roof area to ascertain whether the photovoltaic system really would fit on the roof. If not, a smaller system can also be chosen. This would somewhat reduce how much self-generated power could be supplied. However, savings could still be made with every kilowatt hour from the photovoltaic system that is used on site.

If you use a power storage unit, you increase your level of self-consumption. The electricity is stored temporarily, which increases the overall PV output. The table below shows PV packages in relation to photovoltaic output and battery capacity.

PackPhotovoltaic outputPackage incl. Vitocharge VX3
(capacity in kWh)
battery capacity
Recommended battery capacity
with fuel cell
XS4.68 kWp4.0 kWh4.0 kWh
S6.24 kWp4.0 kWh8.0 kWh
M7.02 kWp4.0 kWh
12.0 kWh
L7.80 kWp8.0 kWh
12.0 kWh
XL9.36 kWp8.0 kWh12.0 kWh
XXL10.92 kWp12.0 kWh12.0 kWh