The use of renewable energy sources reduces CO2 emissions - however the amount of energy produced by the plants often exceeds the demand.
A global trend is to store solar energy surplus through battery storage systems, but is this a good way to reduce the problem?
Are the use of battery systems really economically and energy efficient?
Is the amount of energy stored usable after its production, or the required amount to product a storage system?

Mr. Luciano Guerini has spoken out on this issue and a founding member of Ventosole Energie Ltd, and of the Canadian branch RainorShine Seve Energy Inc, and partner at PVCompare network, that offers solutions for domestic energy storage systems to its customers.
Mr. Guerini has no doubts about the profit of the battery storage system in Italy and said: "The system is sustainable, and even more favourable than the traditional grid with SSP or RID."
"With some exceptions the customer's consumption behaviour should be always be monitored. I speak from experience and the investment for the new storage system would not have a positive sign under 2.600 kWh per year”

"The average family consumes only 30% of the energy produced by its own solar power system. The remaining energy is used by the national grid at a higher cost than that which GSE (Energy Services Management, ed.) pays for the electric current.

Mr. Guerini says a storage system with at least 3kWp manages to give important economic benefits to the average Italian family.

Making profits of the use of the battery storage system and other technologies to store electrical energy from the sun and the wind - is of crucial issue for scientists at the Stanford Global Climate and Energy Project, and led by project leader Mr. Charles Barnhart.

Mr Barnhart, added: "Our first goal was to calculate the total energy cost, which is given by the total of fuel and electricity required to build these technologies - and keep them working."
"As regards the grid we found that in terms of energy cost the storage is worthwhile for the photovoltaic system but not for the wind power one.”
"As regards the grid we found that in terms of energy cost the storage is worthwhile for the photovoltaic system but not for the wind power one.”

"As for the technological aspect, the Californian team has no doubts, the lithium batteries win the comparison with the lead and sodium-sulfur ones."
"Stanford scientists assert that lithium is more efficient and environmentally friendly. It is difficult to say for sure that storage systems are always cost-effective."
At PVCompare.net we believe the Italian investments on the production of energy based self-sufficiency should increase more and more, and the storage systems may be the right solution.