Sonnenschein SOLAR S12/85 A lead-gel battery 12V 85Ah

The Sonnenschein S12/85 A is an absolutely maintenance-free lead-gel block battery, specially developed to meet the requirements of cyclic solar and off-grid use. As part of the globally proven Sonnenschein SOLAR series using Dryfit® gel technology, this battery provides unrivalled cycle stability and reliability. With a nominal voltage of 12V and a nominal capacity of 85 Ah (C100), it is the ideal storage solution for medium stand-alone energy systems, signalling equipment and mobile applications.

Highlights at a glance

• Superior Dryfit® gel technology: Absolutely maintenance-free throughout the entire service life, maximum reliability and leak-proof.
• High cycle stability: Designed for daily, deep charge and discharge operation (approx. 800 cycles at 60% DoD).
• High capacity: 85 Ah (C100) for reliable energy buffering over several days.
• Deep-discharge safe: Excellent recovery even after repeated deep discharges and robust against acid stratification.
• Low self-discharge: Perfect for seasonal use or periods of low solar irradiation.

Maximum supply security for stand-alone systems

The Sonnenschein S12/85 A is the specialist for cyclic applications where the battery is charged and discharged daily. Its main areas of application are off-grid solar systems for holiday homes, motorhomes, boats and yachts. It is also ideally suited for professional applications in telecommunications, traffic management systems, parking meters or signalling systems that require an autonomous and maintenance-free energy supply.

Proven Dryfit® gel technology

The Dryfit® gel technology, invented and perfected by Sonnenschein, binds the electrolyte in a thixotropic silica gel. This makes the battery not only absolutely leak-proof and maintenance-free, but also effectively prevents acid stratification – one of the main causes of premature battery failure in solar operation. The gel technology ensures excellent cycle stability and very low self-discharge.

Developed for longevity and reliability

The SOLAR series was developed for maximum cost-effectiveness over the entire service life. The extremely high cycle life significantly reduces the need for costly and time-consuming battery replacements. The high manufacturing quality and the use of highly pure materials ensure constant performance and thus contribute to the high operational safety of your autonomous energy supply.
 

Features

FAQs about the Sonnenschein S12/85 A lead-gel battery

What is the main advantage of Dryfit® gel technology in solar operation?

The key advantage is the combination of absolute maintenance-free operation, maximum cycle stability and extreme durability. Compared with AGM batteries, gel batteries are often even more robust against deep discharges and provide very consistent performance over a long period of time.

What do the capacity specifications C10 and C100 mean?

The capacity of a battery depends on how quickly it is discharged. The C-rate indicates the discharge current. C100 (discharge over 100 hours) is the standard for solar applications because slow discharge over several days is more common here. C10 (discharge over 10 hours) is relevant for faster discharge.

What is the difference between this solar battery (S series) and a standby battery (A series)?

A solar battery (cyclic) like this is optimised for daily deep discharge and recharging (high number of cycles). A standby battery (A series) is designed for standby parallel operation (e.g. in UPS systems), is permanently charged and only rarely discharged (long design service life in years).

How must this lead-acid battery be disposed of?

Lead batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery free of charge to any retailer who sells new batteries or to municipal recycling centres to ensure proper recycling.