Sonnenschein SOLAR S12/27 G5 lead-gel battery 12V 27Ah

The Sonnenschein S12/27 G5 is an absolutely maintenance-free lead-gel block battery that has been specially developed for the requirements of cyclical solar and off-grid applications. As part of the globally proven Sonnenschein SOLAR series with Dryfit® gel technology, this battery offers unrivalled cycle stability and reliability. With a nominal voltage of 12V and a nominal capacity of 27 Ah (C100), it is the ideal storage solution for small self-sufficient energy systems, signalling systems and mobile applications.

Highlights at a glance

• Superior Dryfit® gel technology: Absolutely maintenance-free over the entire service life, maximum reliability and leak-proof.
• High cycle stability: Developed for daily, deep charging and discharging operation (approx. 800 cycles at 60% DoD).
• Compact design: High energy density in a compact and robust housing.
• Deep discharge proof: Excellent recovery even after repeated deep discharges and robust against acid stratification.
• Low self-discharge: Perfect for seasonal use or periods of low solar radiation.

Maximum security of supply for self-sufficient systems

The Sonnenschein S12/27 G5 is the specialist for cyclical applications where the battery is charged and discharged daily. Its main areas of application are small off-grid solar systems for holiday homes, motorhomes, boats and yachts. It is also ideal for professional applications in telecommunications, traffic guidance systems, parking machines or signalling systems that require a self-sufficient 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 not only makes the battery 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 economy over the entire service life. The extremely long cycle life significantly reduces the need for costly and time-consuming battery replacements. The high production quality and the use of high-purity materials ensure constant performance and thus contribute to the high operational reliability of your self-sufficient energy supply.
 

Battery features

FAQs on the Sonnenschein S12/27 G5 lead-gel battery

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

Avoiding acid stratification is crucial in cyclic solar operation. In gel batteries, the electrolyte is bound, which prevents stratification and makes the battery more resistant to deep discharges. This leads to a significantly longer service life than with AGM or wet batteries in this application.

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, as slow discharges over several days are common here. C10 (discharge over 10 hours) is relevant for faster discharging.

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

A solar battery (cyclic) like this one 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 should this lead-acid battery be disposed of?

Lead-acid batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery to any retailer that sells new batteries or to municipal recycling centres free of charge to ensure that it is recycled properly.