0Bills DIY Solar & Wind Energy Store Online is the ultimate one stop shop for solar panels, wind turbines, energy storage, solar battery storage  systems and off-grid DIY energy products and components for free energy in your home and business. Are you tired with the constant increase of your utility bills? Would not you want to live your life with ZERO Bills in your home or business?  You are in the right place. Start your journey today. Reduce or eliminate your utility bills via 0Bills!

DIY Solar | Off-grid free energy at your doorstep | Unbound your energy | Wind and sun? Yes, save thousands !

We are your global source for best prices in DIY solar pv, solar energy storage systems, solar panels, battery storage and other renewable solutions, parts and components. Whether this be for home power, back-up power, energy storage, solar, hydro, wind power, off-grid or on-grid  (grid tie) home systems, weather stations, marine or RV power systems, e-mobility, heating/cooling solutions, we are the company for you!

ZEROhomebills.com was registered in 2014 and went live in October 2015. The first item sold was an accessory for Solis inverters; a Solis Data Logging Wifi Stick. Dozens of other product categories followed. Just after two years the online DIY store branded 0Bills has become one of the largest solar panels, solar battery storage and off-grid retail stores globally.

Solar PV Panels | Energy Storage | Batteries | Wind Turbine | Solar Kits | Off-Grid DIY Complete Systems

We sell renewable energy, energy efficiency, grid-tie and off-grid solar and wind systems, micro-grid systems, DIY solar panel systems and products for projects large or small. We serve DIY folks, homeowners, contractors, installers, electricians, real estate developers and Governments in Europe and USA. Why not call us today, where you can discuss your project prior your purchase with one of our in house technicians. We are pretty busy but we will try to help you as much as we can. Unbound solar energy and start power your home your way. Go energy independent.

0Bills DIY Store Online serves customers on 4 continents in more than 142 countries. We do ship products internationally from our warehouses located in United Kingdom, Germany, Austria and United States.




0Bills have designed over 3000 DIY solar power and home energy systems since we came online in 2014. We will design you a system that works like your own temperature.



We assemble your order in our Frankfurt, Germany warehouse. Our logistics partners DHL, FEDEX and Dachser offer fast delivery to your address. Outside EU delivery is possible.



Whether you choose the DIY route or bring in an installer, or contractor to help, you will save a lot of money by managing the solar or heating installation yourself.



Our DIY solar pv, battery storage and heating technical support professionals are here to help you install and troubleshoot your system. If we ship it, we support it. Simple is that.


Whether your are in the UK, EU or USA you can save hundreds on your utility bills with our expert tips or just simply go off-grid. We reveal ways to save electricity or gas, plus make your home more energy efficient. Our DIY solar energy and wind store has it all. From choosing the best tariff of our partners to cutting the amount of gas and electricity you use, our advice will help you save money and make your home more comfortable.  Some of our top tips take no longer than a few seconds – so you can get started on saving money on your bills today; mainly by switching to free and green energy.  Keep reading and check our our solutions to find out how to save electricity and gas and cut thousands from your energy bills. Go green solar, unbound solar energy! Do it yourself, do it your way. DIY solar store near me? Yes, right next to you. Wind and sun components at best price in our DIY Solar Store.


Solar Panels: Harvesting the Free  Energy from our Sun

Virtually unlimited power is available from our nearest star, the Sun. The fact is that in just one hour, our planet receives more energy from the sun than the entire world uses during an entire year. Electricity-producing solar panels have only been around for the last 50 plus years, yet they have completely transformed how we harness solar energy. In the southern part of USA and Europe this is a no brainer.

In 1839, a nineteen year-old French physicist named Alexandre-Edmond Becquerel discovered the operating principle of the solar cell, known as the photovoltaic effect. It wasn’t until 1876 that this effect materialized into a viable method of producing electricity with the work of William Grylls Adams. He discovered that by illuminating a junction between selenium and platinum, a photovoltaic effect occurs; electricity could now be produced without moving parts.

Revolutionary as they may have been, the selenium solar cells were not efficient enough to power electrical equipment. That ability occurred in 1953 when a Bell Laboratories employee Gerald Pearson had the bright idea of making a solar cell with silicon instead of selenium. The New York Times heralded the discovery as “The beginning of a new era, leading eventually to the realization of harnessing the almost limitless energy of the sun for the uses of civilization”.

Just in time for the space race, the first solar panels made their debut in the satellite industry. Vanguard I (launched in 1958), the first solar-powered satellite celebrated its 62nd birthday this year, setting mileage records and holding the title of being the oldest artificial satellite still in orbit.

The first solar modules were only efficient enough for space applications, where the Sun’s radiation is much stronger. Eventually satellite research paved the way for Earth-based technology. The 1990’s were pivotal years for photovoltaic technology. Innovations in solar cells allowed for greater efficiency while lowering the cost of production. Germany and Japan led the way with long-term solar power incentive programs helping lower the cost to the public, and spurring the growth of a robust Photovoltaic industry in both countries.

Europe, USA and China leads the Solar Revolution

According to the Renewable Energy Directive (2009/28/EC) of European Commission the EU seeks to have a 20 % share of its gross final energy consumption from renewable sources by 2020; this target is distributed between the EU Member States with national action plans designed to plot a pathway for the development of renewable energies in each of the Member States. For European Renewable Incentives and Feed in Tariffs visit here.

In 2006, California, USA (US state leading the green revolution) made a major long-term commitment to solar power by passing the California Solar Initiative, a ten-year incentive program with the goal of installing 3,000 megawatts of solar panels on the equivalent of one million rooftops. California leads the nation in solar panel installations, as it currently has more photovoltaic systems installed than any other state. This incredible boom has taken place mostly due to California’s Renewable Portfolio Standard, which requires that 20 percent of the state’s electricity come from renewable resources by 2010. In 2008 the state decided that it was not moving fast enough in meeting these goals and enacted a feed-in tariff, requiring utility companies to buy back excess power produced by homeowner’s and private photovoltaic installations. In the same year, the state also raised the Renewable Portfolio Standard to 33 percent by 2020, greatly helping spur growth in the renewable energy industry.

For United States renewable incentives and Net Metering Tariffs visit here.

How Solar Panels work

Photovoltaic solar modules are composed of multiple, interconnected solar cells, which effectively trap photon energy between layers of silicon wafers. Negatively charged electrons are then knocked loose from their atoms, allowing them to flow freely through the semiconductors. Separate diodes, and P-N junctions prevent reverse currents and reduce loss of power on partially shaded panels.

Since the flow of electrical current is going in one direction, like a battery, the electricity generated is called direct current (DC). Sunlight conversion rates are typically in the 5 to 18 percent range, with some laboratory experiments reaching efficiencies as high as 30 percent. Future possibilities include the development of multi-junction solar cells that are capable of harnessing a wider bandwidth of usable light. We are still considered to be in the “early” stages of solar cell technology.

Solar Panel Components

Photovoltaic solar panels are the main building block in a solar power system. Since each solar module produces a limited amount of power, installations usually consist of multiple panels, called an array. The array produces DC (direct current), which can be stored in batteries or instantly converted into AC (alternating current) required by conventional appliances.

Equipment that converts the power from DC to AC is known as a solar inverter, and they come in a few varieties, modified sine wave or pure sine wave. They are further classified based on which type of system it is to be used in, whether it is off-grid or grid interconnected. Recently the innovation of micro inverters has greatly simplified installations, and makes it easy to add on panels to an installation. Each solar module is paired with its own micro inverter, which then converts the power directly at the panel. For off grid installations the use of a charge controller is necessary to properly manage the power harvest, charge the batteries, and prevent overcharging.

The greatest innovation in charge controllers would have to be the relatively new feature called maximum power point tracking (MPPT). This innovative method of charging batteries constantly monitors peak power voltage from the array and input voltage on the batteries adjusting amperage to compensate for the fluctuations. This provides the most efficient means to manage the power harvest. The function of MPPT charge controllers is analogous to the transmission of a car, keeping your charging system in the “right gear”. Other components of the solar system would include the wiring and mounting hardware, while some installations use a tracker that changes its tilt angle and direction throughout the day.

Types of Solar Panels

Solar panels are classified into three classes: mono-crystalline (single crystal), poly-crystalline (multiple crystals), or amorphous silicon. Mono-crystalline is indicative of the continuous and unbroken sample of silicon in which the cell is manufactured from. This method uses very pure silicon grown in a complex growth process, and then sliced into wafers that compose the individual cells. This was the first method used to manufacture solar cells, and are still highly regarded for their efficiency ratios.

Poly-crystalline panels are composed of many crystallites of varying size and orientation. These multi-crystalline panels are generally less expensive and slightly less efficient than mono-crystalline modules, yet lately the difference in efficiency is very small. Like their mono-crystalline counterpart, the cells are also cut into wafers that make up the individual cells of a solar panel.

Amorphous solar panels use the non-crystalline, allotropic form of silicon, in which a thin layer of this silicon substrate is applied to the back of a plate of glass. These panels are much cheaper and less energy efficient, yet they are more versatile in how they can be used. For example, amorphous solar panels can be manufactured into long sheets of roofing material. Thin Film solar panels also fall into the amorphous category. This type of cells can be mounted on a flexible backing, making them more suited for mobile applications.

Each of the solar panel types is estimated to last at least twenty-five years. Instead of stopping production completely, electricity production will decline a little, gradually, over decades. The longevity of a solar panel refers to the number of years before the unit starts producing only 80 percent of its original power rating. The industry standard for warranties is 20 to 25 years, although it is not uncommon for panels to produce adequate power for over 30 years.

Off-Grid versus Grid-tie

Solar panels are used extensively in rural areas, where access to the grid is non-existent or inaccessible. These installations are called off grid (or independent, stand-alone) solar power systems, and require the use of batteries to store the energy for use at night or on long stretches of overcast weather. The energy stored in the batteries leaves the batteries as DC electricity which can power DC appliances (as in RV’s) or be converted to alternating current (AC) for use with conventional appliances. Much like running your own mini utility company, this method gives you full independence from the national grid.

You can eliminate the cost of batteries by going with a system that connects right into your home’s main junction box and use the grid as your power source at night or on long stretches of inclement weather. These installations are known as grid-tied or grid-interconnected systems. This version of solar system enables you to sell any excess power you produce back to the utility companies who have chosen to support “net metering”. Once you are signed up on a net metering program, your utility company will have a smart meter installed known as a Time of Use Meter, which will actually run backwards when you are producing excess power. It is wise to keep in mind that Grid tied systems without a battery backup, are only functional when the grid is operational. Due to anti-islanding features on grid tied inverters, which protect utility workers from working on a live line, grid-tied systems without a battery back up will not continue to produce power during a power outage regardless of whether you have sunshine or not.

Since solar panels produce DC, or direct current, they must be coupled with a solar inverter to convert the energy from DC to AC, or alternating current. In a grid tied system this can be done by a large central inverter, or each solar panel can be outfitted with its own micro inverter. Once the power is converted to alternating current and its phase is synchronized with that of the grid, it is then tied in to your main junction box, which is ultimately interconnected to the national grid.


Victron Energy Charge Controllers Batteries and Inverter Chargers for Sale


Special Sale discount for selected solar and wind products from BYD, Solis, Canadian Solar, Enphase, Huawei, SMA, Fronius and Phocos. Search for our selected solar and wind products in our DIY Solar and Wind Energy Store. Offers are valid only for EU customers with delivery to a EU address via our warehouse in Frankfurt, Germany and Rastenfeld, Austria


VAT Notice for European customers, valid from 1st of January, 2021

  • UK customers 20% VAT.
  • EU customers (orders fulfilled from the EU warehouse) 19% VAT (Mehrwertsteuer), unless you have a valid EU VAT number
  • EU customers (orders fulfilled from the UK warehouse) 0% VAT
  • EEA / International 0% VAT

Please see paying VAT and Taxes

Thank you!

International Shipping Notice for Solar Batteries and Oversized Items!

We design systems mainly for customers in the UK, EU, USA and Canada. If you would like to order solar batteries or products classed as oversized items from the outside of UK, Europe, USA and Canada please note the following:

  • For dangerous goods (solar batteries – UN 3480, UN 3481) and oversized items sold from our European warehouses we can only ship orders directly to Continental Europe and UK Mainland addresses. If you selected such a product and you live outside Continental Europe and/or Mainland UK you must set up/contact a freight forwarding company in Europe who can receive and forward freight to your destination.
  • Products, items classed as parcels are delivered to ALL countries via DHL, Fedex and TNT from all warehouses.
  • For products sold from our USA warehouse we can only ship orders directly to customer addresses is USA and Canada (including military postcodes).
  • In all cases, payment from outside UK, EU, USA and Canada must be made via a bank transfer (BACS, Wire Transfer). No other payment methods, including credit cards are accepted for international purchases.

Due to the SARS COVID-19 pandemic and lockdown measures taken in Cardiff and London, United Kingdom and Miami-Dade County, United States as well as in Frankfurt, Germany we are not accepting any visitors at our headquarters and/or offices until further notice. Please contact us by phone, email or fill out the form above. Thank you.