(Continued from Part 4. This concludes the article.)
I’ll refer the reader to My Ten-Day Test-My-Preps Adventure – Part 4 for the details of how my system works and what I am able to do with it. In a nutshell, during sunlight hours I can take the available 1,500 watts and feed them into my home/shop wiring system and run nearly everything including the freezer.
On Day One if the SHTF, the actual switchover process from grid-tie to off-grid takes just a few minutes. In a simplified explanation, I activate the SPS switch at the inverter and plug a suicide cord (male plug on both ends) into the 120-v outlet next to that switch. I plug the other end of the cord into the nearby 120-v outlet where my air compressor is plugged in. At the breaker box just above that outlet, I install a short jumper wire to connect the two bus bars. With that, the SPS back feeds electricity into the breaker panel and the system is up and ready to power my house and shop.
[JWR Adds This Safety Warning: See the many warnings that have been published in SurvivalBlog over the years about the risk of backfeeding the grid. Readers should consult a qualified electrician to install a safe and approved transfer switch. The lives of utility company linemen depend on this precaution!]
Update: St. Funogas Added:
As per JWR’s warning about accidental backfeeding into the grid in a non-TEOTWAWKI situation, it’s not only unsafe if the proper safety measures aren’t followed but also illegal and you can be hit with heavy fines, liability lawsuits, and the power company can disconnect your service permanently. Before electric providers will allow grid-tied solar panels to be activated, they require installation of their approved shutoff right below the meter which has the capability of being bolted or padlocked in the off position. The comments in my article were referring to a TEOTWAWKI permanent grid-down situation and the safety steps were outlined: the main shutoff is locked in the off position, then the main breaker turned off before backfeeding solar panels into the home wiring system. All of these precautions apply to home generators as well. To be prepared ahead of time for backfeeding if the SHTF, adding a transfer switch as mentioned by JWR is recommended. A less-expensive option is a generator interlock plate ($15-50). These are approved by the National Electric Code and consist of a plate which attaches to the breaker panel and makes it physically impossible to have both the main breaker and a backfeed breaker on at the same time. Also safer than a suicide cord is a code-approved generator cord and inlet box used for home generators and RVs. Mine are already on order and anyone prepping for a long-term grid-down situation may want to consider doing the same.
Since it only works when the sun is shining there are some inconveniences. These inconveniences become negligible compared to having no electricity at all. While the sun is shining water tanks can be filled, washing machines operated, laptops and batteries recharged, shop tools can drill, cut, and sand, electric chainsaws can make firewood, sewing machines and kitchen appliances can work, and the electric mower can be used to maintain that firebreak around the house and trim the garden paths. As a huge service to neighbors, you can also recharge everything from their car batteries to their laptops.Continue reading“Day One of TEOTWAWKI: A Written Plan – Part 5, by St. Funogas”