What Size Battery do you really need?
Many people come to us wanting to run the entire home and run everything from the battery at night, without understanding what battery capacity that would require. So I have put a guide together to give you a visual representation of how much battery capacity would be needed to run home appliances just overnight for 12 hours.
The term Emergency power is backup protection, for when the street loses power. This is usually a reserved amount of power in your battery you can't use, so when it is empty you have the reserve for when the street goes out.
I have broken down battery usage by appliances.
The 10kWh Battery
If you simply want to run things on standby without touching anything else in the house for a 12 hours period overnight, then you would consume about 7kWh of stored energy.
70kWh Battery
Some customers want to run their AC or Heater all night for 12 hours and expect their battery to provide for that situation. The reality is that would require a very large battery that won't get charged by solar or the grid combined in the dead of winter on a standard 6.6kW solar system.
110kWh Battery
There has been alot of talk about new battery technology promoting the use of DC to DC charging from your home battery to you car. But the reality is your batteries usually only have a finite amount of times it can cycle before degredation occurs, so charging two batteries to serve one purpose will degrade your entire system faster and give it a shorter lifespan. The fact remains most people don't have the capacity to charge a home battery of this size to run their car and heating or cooling all at once.
How Much would my solar produce?
Most homes only produce 12 - 32 kWh from winter to summer in a single day, with a 6.6kW solar system.
Free Power from the Grid
How much power can I expect to get from the Grid Network in the 3 hours of free power? A lot of inverters with 5 or 10kw, on the label only charge at 5kW per hour; only a few go as high as 10kW per hour. So you can expect to charge between 15 - 30kWh of energy storage in this 3 hour window.
We believe in providing an honest approach, so you understand what you can expect for the amount of money you are willing to spend.
We continually monitor our customer systems and fully maintain them for 5 years included in every system we sell, so we see every customer and check on what works and what fails over time.
Want to know how we can help you? Book a discovery call today
