Information & service
Technical advice & contact
Tell us the product or describe your project. We can help with product selection and order questions.
Technical advice
Tell us about your project. Details of the application, length and connectors help us advise you.
Find the right answer quickly
Frequently asked questions before contacting us
Many requests can be classified straight away. Here you will find key information for product questions, orders and service cases.
What information helps with a technical product question?
If possible, include the product or item reference, intended use, required length and connectors. For network or installation products, information about the environment, existing equipment and required technical characteristics is also helpful.
Can you help determine which product fits my project?
Yes. Briefly describe what you want to connect or install and the relevant conditions. We can narrow down suitable products based on your information and point out relevant technical specifications.
What should I include for an existing order?
Include your order number, the relevant item and a short description of your request. This helps us identify the order more quickly. Please do not send payment, password or login credentials.
Where can I find shipping and payment information?
Shipping destinations, the shipping process and available payment methods are summarized on dedicated service pages. The options available for a specific order are shown in checkout at the latest.
Can invoice or delivery details be changed after ordering?
Send us the order number and requested change as early as possible. We will check whether the change can still be made at the current processing stage. Changes may be limited once an order has been completed or shipped.
What should I do for a return, withdrawal or complaint?
For withdrawal, the withdrawal terms published in the store apply. For a complaint, please include the order number, item and a description of the issue; photos can help us assess visible damage.
Read withdrawal termsHow does 0% VAT for PV components work?
For certain photovoltaic systems and essential components, the zero VAT rate can apply when the statutory requirements are met. You can find the requirements, process and declaration form on our PV information page.
0% VAT for PV systemsDoes RedStar24 offer OEM or custom manufacturing?
Yes. For companies and institutions, we support custom cable and connectivity solutions from technical clarification and samples through to serial production.
OEM & custom manufacturingUse the contact form and describe your project or service request as specifically as possible.