Eoin Treacy's view -
Of course, if a storm is strong enough to tear solar panels off a roof and the battery can’t recharge, this type of system wouldn’t work for long. It’s also expensive: A single Powerwall unit, which can store 14 kilowatt-hours of energy, costs $5,500 plus supporting hardware and installation that can cost up to $2,000. A similar battery from Mercedes-Benz ranges from $5,000 to $13,000 for a 20 kilowatt-hour system including installation. In the U.K., where Ikea now sells both solar panels and batteries, its batteries are also nearly $4,000 at current exchange rates. Beyond cost, if someone rents an apartment or house and can’t install solar panels, it’s not an option.
But the cost is likely to drop, and battery storage and solar power could also be used in community solar projects, where customers don’t have solar panels at their own homes, but invest in or buy power from a nearby microgrid. In Orlando, customers can buy solar energy from a 12-megawatt solar farm built on top of a landfill; while the power is currently sent back to the grid, in the future, it’s possible that it and other community solar farms could use batteries to provide local backup power from multiple locations in emergencies.
Microgrids, batteries and solar cells have the potential to grow exponentially as costs come down and business models evolve. There are two additional points that are likely to prove attractive to consumers as well as government. The first is that the utility network is likely to be a target in any future war and foreign governments have already demonstrated both the intent and ability to tamper with it.
This section continues in the Subscriber's Area. Back to top