You can always reach the right contact person at the following addresses.
Battery storage
Axitec
www.axitecsolar.com
BMZ
www.bmz-group.com
BYD
www.eft-systems.de
Dyness
www.dyness.com
LG Energy Solution
www.lgessbattery.com
Pylontech
www.pylontech.com
Varta
www.varta-ag.com
Heat pumps & heating elements
Brunner
www.brunner.de
MyPV
www.my-pv.com
Nibe
www.nibe.eu
Solvis
www.solvis.de
Stiebel Eltron
www.stiebel-eltron.de
Viessmann
www.viessmann.de
Solar system and energy management
BAB Technologie
bab-technologie.com
BRC Solar
www.brc-solar.de
EON
www.eon.de
gridX
www.gridx.ai
Kiwigrid
www.kiwigrid.com
KNX
www.knx.de
Loxone
www.loxone.com
SmartDog
www.ecodata-sl.de
Smartfox
www.smartfox.de
Solar Log
www.solar-log.com
Sonniq
www.sonniq.de