I have a 2012 Nissan Leaf electric car. It has given excellent service for 8 years. When it was new it had a range of 70 miles on a charge. Now that the battery is getting tired - it only gets about 45 miles on a charge. It is a great in-town car - but I would never take it on a long trip.
In Florida - we have lots of hurricanes that blow down trees and cause power outages. When Hurricane Michael came by recently - it knocked out our power for 8 days. I was able to power our house with a Honda 2000 natural gas generator. It did a great job running 8 days straight - it reminded me of the Jewish Menorah - 8 crazy nights. The Honda generator is very quiet - but it is not silent.
I have often wanted to buy Tesla Powerwall battery. Very simply - it is a big $6000 battery that charges during normal times - and when the power fails - you can use the battery to charge your home. It is an expensive luxury - and when combined with solar panels you can power your home for free. I recently had a quote done on my home for solar panels and a Powerwall battery - it was $27,000! I passed.
Then I thought to myself - my Nissan Leaf has a giant 650 pound battery in it. It can hold 24 KWH at 400 volts. Surely that could partially power my home in an emergency. It also has a 12 volt accessory battery. The big battery reduces the voltage and keeps the little battery charged when the car is turned on.
I thought that I could use the 12 volt battery - connect an inverter to it - and produce about 1000 watts of 110 volt AC power. The big battery would keep the small battery charged a long time.
I pulled the car up to the house - hooked the 1100 watt inverter to the small battery. I turned the system on and plugged a lamp into the inverter - and the light went on. I felt like Thomas Edison. Eureka! So far so good. But the light uses less than 10 watts of power.
Next I ran a 12 gauge extension cord from the inverter into the house to our refrigerator. I put a gauge at the refrigerator to measure the volts - watts - amps. I turned the system on - and the refrigerator lit up. The motor went on. Everything seemed to work. I was powering our refrigerator freezer from the Nissan Leaf battery. The badge in the refrigerator says it can draw up to 11.6 amps - about 1200 watts.
When I started at noon - the mileage gauge on the Nissan Leaf read 36 miles of range. All afternoon I was watching the gauges - making sure no warning lights or beepers were going off. I felt the battery - inverter - cords - gauges - to make sure nothing was getting hot. The little cooling fan on the inverter did not even cycle on and off. This was too easy.
The gauge would show the refrigerator drawing as little as 10 watts and as much as 200 watts. Of course when the compressor came on - there would be a surge. The inverter is rated at 1100 watts - but can produce 2200 watts for short surges.
I love my old Nissan Leaf. It is a fast - nimble - quiet - and smooth car. But the range has dropped so much - it is just good for short errands of 45 miles or less. It cost $42,000 new - but now the books says it is worth just $5000. A new battery is $6000 - so I am not going to invest in that. I am 72 and have three other cars. Lulu loves driving the Leaf to campus - when we are in normal times. It is excellent for going a few miles and letting it sit all day - then driving home. I have a trailer hitch on it and pull my little trailer around our property doing yard work. It has gobs of torque.
At 10 pm - the mileage gauge had dropped from 36 miles down to 31 miles. It used 5 miles of range to run the inverter and refrigerator for 10 hours. If you extrapolate that out over 45 miles of range - it means it could run the refrigerator - a few lights - TV - computer - phones - for about 90 hours - almost 4 full days.
Lulu requested that I shut it down for overnight - she said I proved my point. She worried it would fail at night and thaw her food. She was such a good sport up to then - I packed everything up - plugged the refrigerator back into the wall - and wrote this story.
During the next power failure - in Florida we are always assured there will be a next one. Instead of striking up the Honda generator - I will start off using the Nissan Leaf to power my home. I also have a generator in my motor home that produces 2800 watts of power - but if I used that - I would not have thought to write this story.
|650 pound battery in floor of Nissan Leaf
|Nissan Leaf battery costs new $6000
|Inverter cables attached to 12 volt accessory battery
|Inverter changes 12 volt DC to 110 volt AC power
|The Krieger 1100 cost $80 on Amazon.
It produces 1100 watts of AC power
with 2200 watt surges
|The little 12 volt battery kept putting out
13.1 volts of DC power
|The frig drew .28 amps
|In the house we were receiving 113 volts
of AC power
|The 12 gauge extension cord went
straight to the refrigerator
|The freezer remained at 2 degrees.
The refrigerator remained at 36 degrees
during the whole experiment.