How many solar panels do I need?

Is self-consumption legal?
Do I have to pay taxes?
How many photovoltaic panels do I need?

Is legal self-consumption?

Yes, of course. It is legal in 100% of cases and possible situations.


Do I have to pay taxes?

It depends on the case, and based on the contracted rate. This tax is the so-called "the tax to the sun" and its application is detailed in Royal Decree 900/2015. For example, most homes, with a contracted rate of less than 10 Kw, are exempt from said tax.


How many plates do I need?

At Watts At Home, we do not believe in "self-consumption kits". Each client is unique, and needs his most appropriate solution. Sometimes good consumption management can reduce the initially needed plates. We offer a free pre-study for your case. In an average house, with a power of around 14 or 20 plates, we can cover a large part of the annual consumption.


If the light goes away, what happens?

In most cases, the systems work in parallel with the network, so if the network fails, the photovoltaic is stopped. We still have systems that can work with support for the network, or that the network is secondary.


How much does it save me on the bill of light?

To find out how much you can save, you should do a study of the installation that suits your client's best, since depending on the consumption and operating hours of your appliances, it will be advisable to install one power or another. It is preferable not to cover the consumption peaks and be able to repay the installation beforehand and thus not give energy to the supplying company. It is also necessary to keep in mind that the sizing of the installation is done based on average radiation values ​​obtained in the last years of that location, reason why this radiation, although very approximate, can vary from year to year. Typical savings only with photovoltaic plates are usually 30%, but with batteries we can reach 80 or 90%.


Does the electricity that is generated and not consumed can be sold?

Yes, but this would imply creating a sales contract with the supplying company and signing up for the IAE (Tax on Economic Activities).


Do I have to continue paying the electricity bill?

Yes, the photovoltaic power plant will work during sunlight hours and if you do not have the batteries you will need from the network when you are not alone. Additionally, you will have to continue paying the fixed part for contracted power (although it can be retrieved)
What guarantee does the installation have? And the materials?

Photovoltaic plates have a product warranty exceeding 10 years, and guaranteed production for 25 years. The batteries have a warranty of more than 5 years and up to 6000 loading and unloading cycles.

What maintenance costs are there?

The maintenance costs are very low in this type of facilities. We could say that they are almost zero. It is recommended that preventive maintenance work be carried out once a year, such as cleaning of modules, state of the structure, connection status and verification of the state of the cabling. At Watts At Home, we offer a very low price online monitoring of the installation with online announcements and periodic reporting.