/ Perfect Welding / Solar Energy / Perfect Charging
SUN INSTEAD OF OIL
THE FRONIUS OHMPILOT MINIMISES
ELECTRICITY AND FUEL COSTS
STEINBACH, AT: wouldn‘t it be lovely if you could produce the majority of your required household energy for yourself? And not
just electricity, but heating as well? The Fronius Ohmpilot allows you to use surplus energy from a PV system to heat up your water.
What‘s more, it can be installed as an add-on – which is exactly what the Samwald family did to their system in Austria. The existing oil-powered heating system for the six-person household can now be deactivated for the entirety of the summer, thus reducing its usage and extending its service life. This has also lead to reduced fuel costs - a saving of over 430 litres of oil every year.
THE CHALLENGE:
Fronius Ohmpilot temperature
/ Preserve the 22-year-old oil heater
/ Reduce energy and fuel costs
/ Increase the proportion of self-consumption
OUR SOLUTION:
/ Connect the current 3 kW heating element to the
Fronius Ohmpilot
/ Optimised energy management with the Fronius
Smart Meter
SYSTEM HIGHLIGHTS:
/ Heating cost savings of 336 euros*
/ Annual oil consumption cut by 432 litres*
/ Increase in level of self-consumption from 30% to
more than 60%
/ From the end of March until the beginning of
November, no oil heating is required to heat water
* Based on 2017 values
The Samwald family from Steinbach in Austria have been using
solar power since 2014 and own a 4 kWp photovoltaic system.
Until now, the weak point in their green credentials had been
their 22-year-old oil-powered heating system. “We decided to in-
vest in a Fronius Ohmpilot because we wanted to lower our electricity and fuel costs, to increase our rate of self-consumption and to
reduce our CO
footprint,” explains system owner Stefan Sam-
2
wald.
The Fronius Ohmpilot was retrofitted to the Samwald family‘s
existing PV system. Surplus solar energy that was not needed by
other consumers in the home used to be fed back to the grid.
Now the Fronius Ohmpilot directs the surplus energy to the heating element in the boiler.
Before the Fronius Ohmpilot was installed, surplus PV energy was fed back into the public
grid.
[W]
4.000
3.200
2.400
SYSTEM DATA STEINBACH, AT
Size of installation
System type
Inverter
Further products
Commissioned
Annual yield
CO2 savings / year
Self-consumption rate
Fronius Ohmpilot, Fronius Smart Meter, Fronius Datamanager
Fronius Ohmpilot: July 2016
Before installing the Fronius Ohmpilot: 30%
After installing the Fronius Ohmpilot: 61%
WITHOUT FRONIUS
OHMPILOT
Heatin g costs / month
Heating oil consumption
/ month
/ Average oil price of 77 euros per 100 litres / 6-person household
Refers to average savings in the year 2017
After the Fronius Ohmpilot was installed, surplus PV energy began to be used to heat water until the target
temperature is met in the boiler.
[W]
4.000
3.200
2.400
95 euros 67 euros 28 euros
123 litres 87 litres 36 litres
4 kWp
Roof-top installat ion
1 Fronius Symo 4.5-3-S
PV system: October 2014
4,172 kWh
2.2 t
WITH FRONIUS
OHMPILOT
MONTHLY
SAVING
1.600
800
0
00:00 02:00 04:00 06:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00
Power fed into the grid
Fronius International GmbH / Froniusplatz 1 / 4600 Wels / Österreich / pv-sales@fronius.com / www.fronius.com
Power consumed directly
1.600
800
0
00:00 02:00 04:00 06:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00
Power fed into the grid
Fronius Ohmpilot power
Power consumed directly
EN v01 Jan 2018
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