Which battery?

Choosing a battery storage solution that best suits your needs can be challenging.
 
Sifting through the growing range of options such as: brand, capacity, size, weight, discharge rates and the chemical composition - how can you be sure you've made the right choice? In trading off which technology you should go for, you have the choice between high energy or high power but rarely can a battery system achieve both.
 
Here are some points to consider  when selecting a solution that's right for you.
Depth of discharge

When selecting a battery, it's important to know how much of that battery is usable in physical terms per charging cycle.

 

The majority of batteries can't be completely drained of their stored energy as they are designed to maintain residual charge levels to maintain the integrity of their componentry.
 

An  example of this could be a battery with a storage capacity of 6kWh, yet when it is fully discharged it maintains 1.2kWh stored, then its depth of discharge is considered to be 80%.

So if you see a battery solution specifying the performance of 4000 cycles at 60% depth of discharge, should the depth of discharge increase above the 60% - the number of cycles (or life of the battery) will decrease.

Charging cycles

This generally refers the transition between the charge and discharge of energy from the battery. 

When looking at most typical applications, batteries generally go through one daily cycle. That is; a Photo voltaic (PV solar) system will provide enough energy to power a premises whilst completely charging a battery storage system, which in turn is discharged during the night (or periods of low/no light) when the PV system no longer generates power.

Generally speaking, batteries are designed to last about 10 years based on a typical cycling regime such as this however, certain factors can impact the life of the battery and its ongoing efficiency:
 

  • Lack of maintenance, where the system requires

  • Variable (or volatile) discharge rates and depth

  • The battery operating temperature and conditions

  • How many cycles are fully completed

  • Speed and control of recharge - overcharge can cause battery failures

SO WHEN YOU SEE A BATTERY WHICH OFFERS A HIGH NUMBER OF CYCLES - DOES IT MEAN THAT YOU'RE GETTING THE MOST EFFICIENT BATTERY FOR YOUR DOLLAR?  NOT NECESSARILY.

 

LET US CUT THROUGH THE JARGON AND PROVIDE YOU WITH A SOLUTION THAT TICKS EVERY BOX!

CONTACT US today, and we can help you  to make sure your solar energy and battery storage decision is the right one!