Finally, we have the real-world usage figures that combine the market impact of the Tesla Powerwall and solar panel systems. Based on the figures received from Natural Solar, our calculation of Tesla’s Powerwall plus solar panels payback is approximately double what was previously reported 13 years ago; this is while use of solar, without the Powerwall accounts for a huge chunk of the savings on your power bill.

While speaking to investors and analysts during a Q2 earnings call for SolarCity held on August 9, Elon Musk gave a detailed account of his plans for what he termed a “Solar Roof”.

Letting in the Light Poised for massive expansion, the global solar photovoltaics market is ramping up and excitement is sparking. Cost reductions, according to the International Renewable Energy Agency (IRENA), are driving huge increases in solar PV investments.

Six months on, he has cut his daily power bill by nearly 90 per cent and said his family had become “smarter” with their use of appliances.