Stand-alone Batteries

Each Batteries have their uses, for off-grid use you may have specific needs and may require different types of batteries, here is an comparison of the different types on batteries we have suited for off-grid use and standalone systems.

Types of Stand-alone Batteries #

GNB sonnenschein lithium battery

Lithium Batteries #

Lithium-ion batteries are a newer form of battery storage, lithium-ion batteries can be discharged deeper and have generally longer lifespan compared to lead-acid batteries, of around 13-18 years. Lithium-ion solar batteries have higher energy density so it can store more power relative to its size, they also do not require as much maintenance as lead acid batteries. Lithium-ion batteries have a 80% depth of discharge and 95% battery efficiency. Average warranty period Is 10 years.

GNB sonnenschein lead-acid batteries

Lead-acid Batteries #

Commonly used in vehicles, lighting, UPS systems, and energy storage applications. Containing a mix of lead dioxide, sulphuric acid and water. This creates a chemical reaction which can store and output electricity. Known for their reliability, Lead acid type batteries have a proven track record of several decades, with relatively lower costs than other batteries, they also take up a lot of space and may emit hydrogen gas. Lead acid batteries have a depth of discharge of 15-30% and 80-85% battery efficiency. They generally have a lifespan of just under 5 years.

Gel and AGM batteries - Victron Energy
Victron AGM gel batteries

Gel Batteries #

Gel Batteries are valve regulated lead-acid (VRLA) batteries that do not release gas. Gel batteries keep the electrolyte suspended in a gel rather than a fiberglass matt. They are sealed, maintenance-free, with a 20-40% depth of charge and 80% battery efficiency. Have a lifespan of up to 12 years, they are a viable option for the budget minded for their reliability and low cost.

Battery Specifications #

Lead Acid Batteries #

  • Rated for 1000-3000 charge cycles
  • Has an 30% depth of discharge and 80% battery efficiency
  • General lifespan of 5 years

Gel Batteries #

  • Rated for 1000-3000 charge cycles
  • Has an 40% depth of discharge and 80% battery efficiency
  • General lifespan of 5 years

Lithium-ion Batteries #

  • Rated for 4000-6000 charge cycles
  • Has an 80% depth of discharge and 95% battery efficiency
  • General lifespan of 13-18 years

Battery Comparison Table #

Lead-AcidGelLithium-ion
AdvantagesRelatively cheapReliable as it has a proven track record of decadesMaintenance freeRelatively CheapReliable as it has a proven track record of decadesCan be discharged heavily Can withstand a wide range of ambient temperature changeLong lastingRelatively higher depth of discharge and battery efficiency
DisadvantagesBulkySensitive to high ambient temperaturesHave a slow charge cycleBulkySensitive to high ambient temperaturesHave a slow charge cycleExpensive Difficult to dispose of due to toxic material.