Gel lead-acid batteries

GEL are sealed lead-acid batteries in which the electrolyte is in a gel-like state.

The gel-like electrolyte is produced by mixing sulfuric acid with a thickener (silica gel). These are maintenance-free batteries. During operation, they do not require water refilling and have no caps. It is not recommended to install this type of battery in places with high temperatures, as the gel dissolves. To prevent gas emissions, this type of battery should be charged with a charger that provides a constant voltage.

Advantages of GEL batteries

Significantly longer service life compared to similar batteries.
No need for the recommended recharge required for conventional acid batteries when voltage drops completely.
Minimal self-discharge — no more than 20% of the initial capacity is lost during a year of storage.
No electrolyte leakage due to the use of gel instead of liquid acid.
Virtually no need for battery maintenance — the lids are securely sealed without technological openings.

Comparison of GEL batteries and AGM batteries

Batteries manufactured using GEL technology can withstand approximately twice the number of full charge-discharge cycles compared to AGM batteries and have greater resistance to deep discharge. At the same time, AGM batteries can provide higher power output and lower internal resistance. Gel batteries dissipate internally generated heat more effectively, making them well-suited, for example, for renewable energy installations. The self-discharge rate of AGM batteries is slightly higher than that of gel batteries, which is why they are not used in devices with low discharge currents.

Battery internal resistance, Battery capacity, WET batteries, AGM batteries, EFB batteries, VRLA / SLA batteries