CO2 Savings with a Batteria Domestica: Your Contribution to the Climate

The climate impact of a batteria domestica

Pannelli solari are already a major step towards a lower impronta di carbonio — but they only reach their full climate potential in combination with a batteria domestica. Without a batteria, a large portion of energia solare is lost or exported to the grid at a low tariff. With a batteria, you use that green elettricità yourself, meaning you need less fossil grid elettricità.

In this article, we calculate exactly how much CO2 a batteria domestica saves, how quickly those savings offset the production emissions of the batteria itself, and why every kWh of your own energia solare counts for the climate.

How do you calculate your CO2 savings?

The CO2 emission from Dutch grid elettricità varies by hour, but averages circa 270–340 grams of CO2 per kWh (2025 figure, including imports). This is the so-called grid emission factor. Every kWh you draw from the grid emits in media that amount of CO2.

Emission factor of the Dutch grid

A large portion of the elettricità that pannelli solari export to the grid is lost through transmission losses (circa 5–8%). A batteria domestica minimises this by storing the elettricità locally and consuming it on-site — more efficient for both the grid and the climate.

Less export = less loss

You can calculate the CO2 savings all'anno as follows: avoided grid consumption (kWh) × grid emission factor (kg CO2/kWh) = CO2 savings (kg). For a system that saves 2,500 kWh all'anno from the grid with an emission factor of 0.3 kg/kWh: 2,500 × 0.3 = 750 kg CO2 all'anno.

Concrete CO2 figures by batteria size

Below are the calculated annual CO2 savings for three popular batteria sizes, combined with an average solar system:

A 10 kWh batteria saves over its 15-year lifespan more than 11 tonnes of CO2 — equivalent to not taking the Amsterdam–New York flight 4 times.

How the batteria domestica strengthens the green energy system

A batteria domestica has a positive effect on the entire energy system:

• Grid balancing: batterie buffer the variable production from wind and solar, meaning fewer gas-fired power stations need to run as backup
• Riduzione dei picchi: during moments of high demand, the batteria can discharge instead of a gas-fired power station starting up
• Transmission loss reduction: storing and consuming locally limits transmission losses in the grid
• Green charging profile: ricarica intelligente during periods of high wind and energia solare increases the green share of your consumption
• Sector coupling: in combination with a pompa di calore or caricatore EV, the batteria also leads to CO2 reduction in other sectors

Periodo di ammortamento for the climate: carbon payback

Over the batteria's lifespan, it performs well above break-even for the climate:

An average 10 kWh batteria domestica has a production footprint of circa 1,200–1,500 kg CO2 (material extraction, production, transport). With annual savings of 750 kg CO2, the carbon payback time is less than 2 years. The remaining 13+ years are entirely climate-positive.

Conclusion: small investment, big climate impact

The batteria domestica is one of the most cost-effective measures for consumatori to structurally reduce their CO2 emissions. Compared to other green investments such as pompa di calores or insulation, a batteria offers a combination of financial and climate returns that is unique.

At Home Energy Solutions, we esclusivamente supply batterie that meet strict sostenibilità requirements. We are transparent about the production footprint and help you calculate the climate impact of your investment.