Homeowner Blog

Another year has gone by with Tesla roof tiles as popular as ever in the public imagination, yet still mostly intangible. But that could all be about to change. Tesla has announced Solar Roof, the latest iteration of his solar tiles with promises of improved technology and scalability. The company is aiming to ramp up to 1,000 installations a week in America, so what can we expect?

The inverter is the heart of a PV system. It’s the crucial interface between your solar panels and the rest of the home, batteries or national grid. Aside from converting DC solar power into usable AC, it houses many of the system’s safety features and performance monitoring.

Given it’s such an important component, let’s talk about how to choose a solar inverter. What do you have to consider, and which is the best model?

With the increasing instability in the world, on site solar is ever more appealing. It’s a technology that empowers individuals to supply themselves with clean, renewable energy at an increasingly affordable price. Innovation in this industry is constant, so let’s see how one of the developing trends in PV stacks up by comparing solar tiles vs solar panels.

One of the most appealing aspects of solar PV is that it requires very little maintenance in return for decades of functioning lifetime. With no moving parts, solar panels aren’t put under the mechanical stresses inherent in other generators. But the system is a significant investment - with most of its return based on using its electricity - so a little upkeep is worthwhile to ensure it’s always performing at its best.

Image source: Optigreen.

Those looking to make the greatest benefit from their roof space may feel they should choose between solar panels and green roofs - but can you combine the two? Yes - though both systems need to be designed properly.

It’s important to do your research when planning your solar system, but the sea of technical terms can soon become overwhelming. Let’s address some of those you may come across when comparing types of solar panel - and see how those types stack up.

Why does the solar panel output matter?

When installing solar panels there are many things to deliberate over, whether that be the price or aesthetics, but probably the most important metric to consider is the output. More often than not the price you pay for an installation will be relative to the power output of the system. The rated power output or wattage of a panel represents the theoretical power output under ideal conditions and is a strong indication of the amount of electricity a panel will generate. However, there are factors other than the panel’s wattage to consider when determining its output or energy generation. 

The solar PV industry has faced a year of change in 2019, with more uncertainty lying ahead. First came the end of the Feed-in Tariff, the guaranteed payments for people generating solar energy. The 50% deemed Export Tariff for smaller systems ended at the same time and we’re still waiting to see what will fill the gap, to prevent customers with new solar systems from exporting excess electricity to the grid for free. (Don’t worry, this doesn’t impact people who installed their system before the final Feed-in Tariff deadline of 31st March 2019.) The current proposal from the government is the Smart Export Guarantee (SEG) - more on this below. As a final kick in the teeth to the industry, another threat to solar PV installation has resurfaced - a potential solar VAT rise on domestic systems from 5% to 20%.

So what does all this mean to you? Is solar PV still worth installing now, either as an extension to your existing system, or as a new system altogether, or should you wait? And what about a solar battery?

Around 30 GigaWatts of the UK’s older fossil fuel and nuclear capacity is due to be decommissioned by 2025. At the same time, more and more of us are taking delivery of our first electric car, pulling away from the lights much faster than the petrol heads while fuelling a significant increase in the national electricity demand.

Furthermore, with the advent of renewables, the problem of balancing supply and demand within the National Grid is become ever more challenging, leading to periods of excess demand and ‘negative electricity prices’. 

And with all this comes an increasing expectation of power cuts, grid constraints and increasing electricity costs.

Enter battery storage, and in particular, home battery storage. And smart meters, and smart electricity tariffs.

In January SunPower introduced the world’s first 400 Watt residential solar panels.

Utilising 104 Monocrystalline Maxeon Generation III solar cells, the panels have an efficiency of 22.6%. 

The panels have ‘standard’ panel dimensions of approximately 1.69m x 1.05m, giving an output of 226W per square metre.

As always with SunPower, the panels have a premium look…