Tesla’s Powerwall has earned a lot of good reviews since it was released in 2015. Still, when you plan to buy one, to know it’s worth, there and a question that will come to your mind is:
Can it store enough power that can make it a correct option?
So, now let’s check what Tesla powerwall is and how it works as a solar energy storing solution?
It’s a rechargeable home battery system that can easily store solar energy or power from the grid and allows you to use it when you need it. It can store AC electricity. This means it can take the AC electricity converting it to DC electricity and stores it in the battery. And when there is huge need it can again change it back to AC electricity for your residential and commercial use.
The additional advantage of the latest model of powerwall 2 offers is it has its own battery inverter and battery management process. With the previous model, you needed to keep a hybrid battery inverter also.
Coming to the next important phase – How it works?
The unit is simply two metallic boxes (can be said as a huge iPhone). The components inside are inverter and a Lithium-Ion battery with a Backup Gateway. The backup gateway is responsible for energy management and adjusting the functions of the energy storage unit. Along with this function, a backup gateway can be enabled for communication functions approximately for 10 Powerwalls.
The next important factor that must be lurking in your mind is – will Tesla Powerwall be helpful with backups in case of grid failure?
Many of us are not aware that when we have a general grid connect solar unit and the utility grid stops, it is a legal need that the grid connect must stop the solar unit to prohibit feeding the energy back to the grid while a technician is working on it.
When you have Powerwall, it is facilitated with an electronic disconnect that cut off your residential electrical loads. And then the Powerwall allows you to use the solar energy or the stored energy to meet your electrical needs.
What is the storage capacity of Powerwall 2?
It can store up to 14kWh of power or energy.
How much power back up it can provide and for how many hours?
Powerwall is designed to discharge 5kW of power constantly with the short bursts of 7kw. So while you use it as a backup you can’t use it for the devices that require more than 5kW, which is approximately 20amps on a 240v.
The time duration largely depends on the consumption and the amount of energy stored in the unit before the grid failure. If the battery is completely charged before the power cut and you have the usage up to 2kWh/hour it can provide the backup for nearly 7hours.
