0,06 - 0,07 Euro Cent/kWh!

No longer tolerate the super expensive energy bill?

Get yourself a Barrel! install it easily by following our video tutorials.

Spot electricity in this period is around 0,40 euros / kWh

So let's talk about increases of 500%! + 500%. Not even bitcoin. But it's not bitcoin ... it's the energy that moves our lives..

Example in Madrid
5650 kWh / year.

with 4000 Wp PV installed you can produce 10-11 kWh / day in winter and 20-22 kWh / day in summer of electricity 'per day. Average cost of 0.069 cents/Euro.

How is works

In this new age of uncertainty, there is the real possibility of finding yourself without electricity. Geo-political tensions, paired with the current competition of nations to grab gas and oil, are causing the costs of bills for families and small businesses to skyrocket.

The climate crisis has also led to exceptional weather events that damage infrastructure and power lines.

Despite the 87 million barrels of oil that are still sold every day around the world, the energy that used to flow with ease and without limitets into our homes can no longer to be taken for granted.

Barrel TM has successfully reinvented the use of these barrels, a symbol of the fossil industry since 1860.

The solution is Barrel TM ,the photovoltaic solar electricity generator with lithium-ion batteries (LiFePO4), producing clean, low-cost energy.
Barrel TM is simply a brilliant and immediate solution for powering homes, offices and small businesses.

Barrel TM reduces consumption costs of refrigerators, air conditioners, electric boilers and heaters. Barrel TM also charges bikes, scooters and small electric cars.

Upon arrival, with plastic free packaging, the set-up and installation is beyond simple. Open up the lightweight solar panels and attach the plug. Seeing that it’s disconnected from the network, Barrel TM does not require permits, and it’s also designed for the possible connection to your backup generator.

In emergency situations, when you need to act quickly, Barrel TM is easily transported and quickly installed, bringing immediate help to the population.

Barrel TM is repairable, recyclable, and robust. Made in Italy, it has style and does not fear water and dust. Barrel TM is also protected against theft and tampering.

Barrel TM works with any photovoltaic panel, although when combined with ultra-lightweight panels, it becomes even simpler, because they are quickly installed with small metal cables, dowels, double-sided adhesive tape on roofs, walls or wherever you want.

Barrel TM was awarded the prize of “best energy storage system” by PV magazine, a leading magazine in the industry.
Save money, and become independent by protecting yourself against blackouts.
The sun belongs to everyone, and Barrel TM is the simplest and most competitive solution on the market.


Solar can be used to provide the majority or all of the power in a remote cottage or home. Ideally, the solar system is designed by a professional to match your lifestyle and electrical load. The systems are modular so they can grow as your power needs change. Off-grid solar systems have storage bat- teries, and often have generators for back- up. The inverter systems for off-grid appli- cations have built-in battery chargers, and can even be used to start the generator automatically if needed.

Different size of PV modules will produce different amount of power. To find out the sizing of PV module, the total watt peak (Wp) produced needs. The peak watt (Wp) produced depends on size of the PV module and system location. We have to consider “sunlight factor” which is different in each site location. For central europe the factor is around 3, and corresponds to about 3 hours of sunlight, per day, expected average over the whole year (including in the winter time).

To determine the sizing of PV modules, calculate as follows:

2.1 Calculate the total Watt-peak rating needed for PV modules

Divide the total Watt-hours per day needed from the PV modules (from item 1.2) by 3 to get the total Watt-peak rating needed for the PV panels needed to operate the appliances. The factor 3 corresponds to the day-hours sun radiation under central european conditions and all season working mode (also winter), if PV system working in spring-summer-autumn the factor will be around 4-5 and for systems working only in summer, around 6-7 hours sun per day (factor=6 to7).  

2.2 Calculate the number of PV panels for the system

Divide the answer obtained in item 2.1 by the rated output Watt-peak of the PV modules available to you. Increase any fractional part of result to the next highest full number and that will be the number of PV modules required.

Result of the calculation is the minimum number of PV panels. If more PV modules are installed, the system will perform better and battery life will be improved. If fewer PV modules are used, the system may not work at all during cloudy periods and battery life will be shortened.

Solar mode : The inverter powers the loads by drawing energy directly from the photovoltaic system.In the event that the electricity from the photovoltaic system is not sufficient to power the loads, the inverter will also draw energy from the batteries. The network or diesel generator will only intervene if one of the two underlying conditions occurs:

There is no production of energy from the photovoltaic generatorThe battery voltage reaches too low values.

Battery mode : The inverter powers the loads by drawing energy from the photovoltaic generator. In the event that the energy from the sun is unable to power the loads, the inverter also draws energy from the batteries. The inverter draws energy from the electricity grid only in one condition: when the battery voltage is too low.

Yes, the generator can be connected to the grid port (no line selector required, the Barrel can charge the battery with genset and serve the loads).

Yes, with full-back-up

Yes, in the battery Report covers UN 38.3 (UN ST/SG/AC.10/11/Rev.6)
Transportation Testing for a Rechargeable Lithium-Ion (LiFePO4) Battery Packs - UN Specified Packaging, Lithium Battery Class 9 Label and Cargo Aircraft Only Label. Packaged in accordance with
packing instruction P903.

Yes, battery pack included of 2. 8 kWh. you can increase sizing from 2.8 kWh to 100 kWh max outside of the Barrel.