Romania produces excess green energy but loses it when needed most; storage batteries offer a solution

Romania is rapidly increasing its renewable energy capacity, but this growth is exacerbating a significant imbalance within its energy system. During midday, when solar photovoltaic production peaks, electricity demand is often lower. This situation can lead to price drops, with the surplus energy either fed into the grid or exported.

As evening approaches, the dynamic reverses. Consumption rises as households use more electricity for lighting, cooking, and appliances, while solar production dwindles to almost nothing. Without sufficient storage capabilities, Romania finds itself selling energy at low prices during periods of surplus and then purchasing more expensive power when demand is high and supply is low.

The core challenge of the energy transition is not just producing green energy but synchronizing its production with consumption. Electricity cannot be easily or cheaply stored like other commodities; it must be consumed as it is generated or transferred to a storage system.

Energy storage, particularly through batteries, has emerged as a critical component for the future energy system. These systems capture electricity when it is abundant and release it later when needed. For households with solar panels, batteries can store daytime energy for evening use, thereby reducing reliance on grid power. The most common technology for residential use is lithium iron phosphate (LiFePO₄) due to its stability, safety, and longevity.