FAQ — Frequently Asked Questions

We offer plug-and-play balcony energy storage systems, modular home storage systems (S2400 series), flexible and lightweight solar panels, and accessories (smart plugs, inverter adapters, smart meters). Our systems are primarily designed for single-family homes, apartments with balconies, and RVs — ideal for grid-connected supplemental power, emergency power, and self-consumption optimization.

We offer plug-and-play balcony storage systems, modular home batteries (S2400 series), lightweight flexible solar panels and accessories (smart plugs, inverter adapters, smart meters). Products target apartments with balconies, single-family homes and mobile applications — for self-consumption optimization, backup and grid-coupled use.

Our S2400 series supports AC-coupled setups and is compatible with common micro and string inverters. Compatibility lists can be found on the respective product page. For special cases (e.g., older inverters), we recommend checking the datasheet or contacting support with your model details.

S2400 supports AC-coupled setups and works with common micro & string inverters. Compatibility lists are available on product pages. For edge cases (eg, older inverters) please check the datasheet or contact support with the inverter model.

If shipping is within Germany, the processing time is usually 1-2 working days.

For orders within the EU (outside of Germany), please allow approximately 3-5 working days – our warehouse will take care of the international express shipping.

For deliveries outside the EU (for example to Great Britain or Switzerland), processing may take approximately 7-10 working days, as customs clearance is required.

If shipping within Germany, the usual processing time is 1-2 business days.

For orders within the EU (outside Germany) please allow approximately 3-5 business days — our warehouse handles international express shipping for these deliveries.

For deliveries outside the EU (for example to the United Kingdom or Switzerland) processing can take around 7-10 business days due to required customs clearance.

Once your order has been shipped, you will receive an email with the tracking number and a tracking link. If you have any questions about delivery, please contact us at service@apollosolarenergy.de or by phone.

After dispatch you will receive an email with the tracking number and a tracking link. For delivery queries contact info@apollosolarenergy.de or call us.

Standard warranty: 24 months against product and manufacturing defects (excluding wear parts). Additional performance guarantees apply to battery systems (e.g., cycles or remaining capacity) — see the warranty statement and data sheet for details on each product.

Standard warranty: 24 months for manufacturing defects (wear parts excluded). Batteries carry additional performance guarantees (eg, cycle life or retained capacity) — see the product warranty documentation for specifications.

As a consumer, you have a statutory right of withdrawal of 14 days from receipt of the goods. The goods must be returned undamaged and, if possible, in their original packaging (exceptions: opened batteries, custom-made items). Return shipping costs and procedures are described in our cancellation policy.

Consumers have a statutory 14-day right of withdrawal from receipt. Items should be returned undamaged and in original packaging where possible (exceptions: opened batteries, custom-made items). Return costs and procedures are described in our withdrawal instruction.

For simple plug-and-play balcony solutions, an electrician is often not required; however, in cases of uncertainty or permanent installations (e.g., fixed connection to meter/inverter), we recommend installation by a qualified electrician to ensure safety and compliance with local regulations (e.g., VDE).

Many plug-and-play balcony solutions do not require a certified electrician for setup. However, for fixed installations (eg, permanent connection to a main meter or inverter) we recommend a certified electrician to ensure safety and compliance with local regulations.

1. Check the plug connections and fuses.
2. Is the battery completely discharged? Charge it for at least 30 minutes.
3. Check firmware status (app/display) – restart if necessary.
4. If the problem persists, contact support with the serial number (S/N) and a description of the error.

1. Check plug connections and fuses.
2. Is the battery fully discharged? Charge for at least 30 minutes.
3. Check firmware/status via app or display — try a reboot.
4. If the issue persists, contact support with your serial number (S/N) and a description of the fault.

Batteries must not be disposed of with household waste. Take used batteries to municipal collection points or return them to your retailer/service partner. For larger battery systems, we offer take-back solutions—contact our support team for collection options.

Batteries must not be disposed of with household waste. Return old batteries to municipal collection points or hand them in at a retailer/service partner. For large battery systems we offer take-back solutions — contact support for pickup options.

Our products comply with relevant standards (e.g., CE, UN38.3 for battery transport, RoHS). Certificates and test reports can be found on the product page and in the download area.

Products comply with applicable standards (eg, CE, UN38.3 for battery transport, RoHS). Certificates and test reports are available on the product pages and in our Download section.

We accept credit cards (Visa, Mastercard), PayPal, instant bank transfer/Klarna, and SEPA direct debit (for registered customers). Invoicing for business customers can be arranged individually.

We accept credit cards (Visa, Mastercard), PayPal, Sofort/Klarna and SEPA direct debit (for registered customers). Invoicing for business customers can be arranged individually.

Deliveries within the EU to private customers are generally subject to German VAT (19%). For business customers with a valid VAT ID, delivery can be net (reverse charge). Deliveries outside the EU may be subject to customs duties and local taxes.

Deliveries within the EU to private customers are generally subject to German VAT (19%). Business customers with a valid VAT ID may receive a net invoice (reverse charge). Non-EU deliveries may incur customs duties and local taxes.