How does a storage system lose energy?

They pass through cables, electrical components (such as inverters), and finally through the batteries of your storage system. At each obstacle or resistance, they release a small amount of their energy – this is when conversion losses occur, similar to the way people lose energy when overcoming obstacles.

What is inverter efficiency?

In simple terms, inverter efficiency refers to how well an inverter converts DC electricity into usable AC power. No inverter is 100% efficient—some energy always gets lost as heat during the conversion. Most modern inverters have efficiency ratings between 90% and 98%. Let’s break it down:

Why does a storage system have a small inverter?

Let's assume that the inverter of the storage system is slightly smaller so that the house consumption, which rarely has high power peaks, runs as often as possible at optimum efficiency. The storage system's inverter therefore frequently runs with a high load and therefore close to the optimum range.

Is an inverter 100% efficient?

No inverter is 100% efficient—some energy always gets lost as heat during the conversion. Most modern inverters have efficiency ratings between 90% and 98%. Let’s break it down: If you feed 1000 watts of DC power into your inverter and it outputs 950 watts of AC power, your inverter efficiency is 95%.

How does a battery inverter work?

Chemical energy in the batteries is converted into electrical energy and this flows through the inverter back into the domestic grid. Without taking into account the resistances in the cables, the electrons have to overcome two components during storage and discharge, both there and back, where they naturally release energy.

How much energy does a storage system use?

This means 340 kWh conversion losses and 131 kWh losses due to self-consumption. The energy available from the storage system minus the losses is then 2,000 - 340 - 131 = 1,529 kWh. In other words, the efficiency in this year is around 76.5 per cent. In principle, a higher degree of efficiency is desirable, as less energy is lost on the way.