Sonnen batteries recharge from solar panels when the grid is down
Published on 05 Apr, 2019 by Michael Bishop
Categories: Home batteries
Note: A previous version of this article incorrectly stated that Sonnen's energy-storage systems won't recharge from solar panels when the grid is down. Shame on me (the author, Michael Bishop) for poor fact checking.
Sonnen offers a premier home energy-storage system, rivaling Tesla's Powerwall energy-storage system.
Most homes that get energy-storage systems aren't doing it for financial reasons (because the financials aren't good in most cases). They're doing it for peace of mind — they want a backup source of power if the electric grid goes down.
Image source: Sonnen
Batteries and solar panels
Solar panels can take that independence to the next level. The solar panels can recharge the batteries during an especially long grid outage caused by a hurricane, wildfire, preemptive utility safety shut downs, or possibly someday a cyberattack.
That's exactly how it works with Sonnen's battery-backup systems (such as ecoLinx) and Tesla's Powerwall battery-backup system. They'll recharge from on-site solar panels whether or not the electric grid is available. (Tesla is even planning to offer an energy-storage system designed specifically for 100% off-grid use — for those in especially remote areas not served by the local utility, or those who are completely over dealing with their local utility.)
Frustrated homeowner, that doesn't have a Sonnen battery-backup system.
Adding Sonnen's energy storage system to existing solar panels
Already have solar panels? Fortunately, it's straightforward to add a Sonnen energy storage system — it's compatible with every solar inverter under the sun (solar inverters convert the direct-current electricity made by your solar panels to grid-friendly AC electricity).
Sonnen or Tesla Powerwall?
A nice bonus with Sonnen is their chosen battery chemistry. Their lithium iron phosphate batteries are arguably the safest and longest-lasting batteries available, with no chance of dangerous thermal runaway.
I'd choose Sonnen :).