Eskom’s tariff increases, revised self-generation thresholds, and continued interruptions from load shedding have confirmed the business case for renewable energy alternatives if ever this was in doubt.
|Altum.Energy offers solar and battery storage expertise, powered by pre-feasibility energy and financial modelling tools. We maximise yield and IRR through perfectly balanced solar and hybrid energy solutions.|
Our NaS battery offering means that we can provide optimised solutions for small, large, and utility-scale projects.
|NaS batteries offer long lifetime and reliable performance|
The value proposition of a battery is linked to its total lifespan. A long lifespan provides a higher return on investment, as there is less chance of the need to replace that battery over the total project period. A battery’s lifespan should therefore be able to match the optimal financial period of the project.
Specifying a battery with a low or unproven lifespan is a risk which may have significant financial implications. Battery degradation over time affects performance and thus may affect lifespan, particularly if performance drops to a level which require batteries to be replaced.
Energy vs. power batteries – different applications require different batteries
Energy batteries are designed for use in applications which require a reliable, long-term supply of power at the rated output. Examples include uninterruptible power supplies (UPSs), mobile phones, laptop computers, digital cameras, electric vehicles, and the like.
Power batteries, on the other hand, are designed to provide short bursts of high-power energy. Power batteries are found in automotive, industrial, and rapid charge applications.
High energy density or high-power density?
Energy storage systems with a high energy density can store a lot of energy in a small amount of mass. High energy density, however, does not necessarily mean a high-power density. A system with a high energy density, but low power density can perform work for a relatively long period of time. An example of this type of energy storage is a mobile phone battery. Its power will last most of the day before being recharged.
High-power density systems can provide large amounts of current based upon its mass. For example, a tiny supercapacitor may have the same power output as a large battery. However, since the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high-power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It must be small enough to fit inside the camera but have a high enough power output to fire the flashtube.
Performance and reliability of NaS batteries
Not all battery technologies are the same, and buyers who think storage is a commodity are mistaken. One needs to fully interrogate application, lifespan, degradation and other risk factors in detail, knowing that many technologies remain unproven over the longer term. READ MORE…