FAQS

Most products support plug & play installation and require no technical expertise. For home storage systems, however, we recommend installation by qualified professionals.

All products use automotive-grade LiFePO4 cells, feature multi-layer BMS protection, and meet international certifications such as CE and VDE.

Both home and portable energy storage solutions are modular and can be expanded. Depending on the model, 4–8 units can be connected in parallel.

Yes. Our energy management systems are compatible with most mainstream PV modules and microinverters. Please check the technical specifications before connecting or contact our support team.

Yes. Core functions such as energy distribution and protection mechanisms run locally. However, an internet connection is recommended for data monitoring and remote access.

Our devices use low-noise fans and operate at a sound level of under 25 dB, making them barely audible in normal use.

No, TENTEK products are low-maintenance. A simple visual inspection and cleaning of ventilation openings once a year is sufficient.

Yes. Updates can be performed easily via our app or PC client. You will receive notifications when a new version is available.

Depending on the product type, the warranty is up to 2 years. Details can be found in our warranty policy.

Yes, we offer a 14-day return policy for unused products in their original packaging. More information is available in our return & refund policy.

You can place an order directly through our website by selecting your desired product and completing checkout.

We currently ship exclusively within Germany.

Within Germany, delivery typically takes 3–7 business days.

We accept credit card, PayPal, and Sofortüberweisung. Additional payment options will be added gradually.

If your order has not yet been shipped, it can be modified or canceled. Please contact us as soon as possible via email.

All manuals and installation guides are available on the respective product pages as well as on our downloads page.

You can reach us via email at support@tentekenergy.com. For complex cases, we also offer remote technical assistance.