KOSTAL installer portal: good, comprehensive advice

Anyone purchasing a solar system expects good quality and performance. Our KOSTAL customer service team is on hand to answer any questions about our KOSTAL inverters. Fast, uncomplicated and personal.

KOSTAL service for installers: all advantages and services at a glance

Service & support: KOSTAL customer service - always there for you

Service and Support

KOSTAL Solar Academy: Seminars and webinars

KOSTAL Solar Academy
KOSTAL Video-Tutorials mit Tipps für einfache Installation und Inbetriebnahme der Wechselrichter

The KOSTAL video tutorials make it very easy to install inverters

Video tutorials

Take part: KOSTAL programme for certified installers

Become a certified installer

Wholersale overview: You will find the wholesaler you trust here

Wholesale overview

Planning photovoltaics: System design made very easy with the KOSTAL Solar Plan

Download the KOSTAL Solar Plan

Service hotline and contact

Our Service team is available by telephone to answer all your questions before and after your purchase, for example:

  • General technical advice and warranty processing
  • Support for system planning using the KOSTAL Solar Plan configuration software
  • Help with commissioning
  • Support for system analysis and advice on configuring system monitoring

Phone +49 761 47744 222 (Mon-Fri from 8 a.m. to 5 p.m.)

Service code/PARAKO

The system-specific shutdown limits can be adapted to the grid operator's requirements using the PARAKO parameterisation software or the service code for the PLENTICORE plus and PIKO IQ inverters.

Before a personal password can be allocated, we, KOSTAL Solar Electric, need you to confirm that you're an electrician from an authorised specialist company and that you won't disclose the password to the plant owner. Therefore, please download the registration form, fill it out, scan it in and return it via our contact form.


You can submit a complaint outside our hotline opening hours. Please complete the questionnaire  and send it to us, together with the log data, as an attachment to our contact form. If the inverter isn't included in our free KOSTAL Solar Portal, please interrogate the log data from the device.

Great news: Your request will be treated as a priority.

Smart connections.Offers


To the webinars


To the tutorials

Photovoltaic planning

Our free KOSTAL Solar Plan software simplifies the inverter layout process.

KOSTAL Solar Plan: inverter layout made easy

Just enter the system data and individual customer data and receive a recommendation for a KOSTAL inverter tailored to the solar system you're planning. All solar and hybrid inverters are taken into account.

The customer's power consumption is also considered and, using standard load profiles, the potential for self-consumption and self-sufficiency is indicated.