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Instrumentation Options for a Portable Generator

In various online forums, people are routinely asking for help when faced with a generator that’s being overloaded. This may be in the context of a food truck, mobile pet salon or delivering whole house backup power.

It’s believed that management guru Peter Drucker once said, “You cannot manage what you cannot measure.” I have been making a lot of use of that quote when offering answers to such questions. If you are placing a significant load on the generator, you need to monitor the load to know when you are nearing overload. Allowing it to overload is disruptive, time consuming and potentially dangerous. Without hard data to inform your decisions, you’re only guessing about how to address the problem.

Option #1: Built-in Load Monitoring

If you don’t yet have a generator, you might well consider instrumentation in making that choice. For example, my Harbor Freight Predator 9500 was one of the first of a new crop of high-power inverter models that became available in 2021. It does not have any built-in instrumentation. So, it was incumbent upon me to provide such capability externally.

In contrast, a bit over a year or two later a neighbor bought a Pulsar PGD95BISCO from Home Depot. This Pulsar if effectively a cousin to my Predator. They’re both made in China by Chongqing DK power machinery Co.,LTD. The Pulsar model was introduced later in February of 2023. To be competitive it has a few more features that the Predator. One of the nicer features is a built-in load meter.

The built-in LCD shows the output voltage, frequency and aggregate load on the generator in real-time. This is very handy. I wish my Predator had this feature.

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Oh, bother. Where art thou? Base Power

I first wrote about Base Powerback in May 2024. Inspired by Doug Lewin’s Energy Capital podcast, I signed up for the companies mailing list, in the hope of learning when they Austin-based company would be offering service in Houston. In fact, I’ve signed up twice!

We’ve received literally nothing from the company. Putting our address into a page on their web site they report “Great news! Base is coming to Houston soon! We’ll be installing in your area later this year.”

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EVs & Corporate Branding

Back in February of 2019 we bought a new furnace…in a hurry. Our furnace went out during a cold snap. The old furnace died at about 5pm. I called my then favorite HVAC contractor. He hustled over to investigate, delivering a prognosis by 7pm. He rightly noted that the 25 year old Kenmore furnace had given its last gasp. It could be repaired, but getting the parts would take days. The wise choice was to replace it outright.

I was thinking ahead to a new AC unit, so I wanted a top-end American Standard natural gas furnace with a variable speed blower. That would allow us to install a high-efficiency, variable speed air conditioner in the future.

It happened that he had exactly what we wanted on stock. It was sitting in a warehouse, ready to be installed in his own home, which was a new build. His crew installed that furnace in our house the very next morning. By 10am the heat was back on. It all happened so fast. While I doubt we got a bargain, he certainly earned our gratitude.

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Backup Power: Quarterly Testing and Being Neighborly

As we are now well into Hurricane Season 2025, I’m thinking about out backup power arrangement. We’re mostly in good shape.

Quarterly Testing

Last week I exercised the Predator 9500 inverter. It needs to run for about 30 minutes every 90 days, just to keep it limber. I typically put a few ounces of gas in the tank and let it run connected to the garage until it runs dry. While I always add stabilizer to the fuel I intend to use in the generator, I’m very careful to always run it dry. I never want to leave any gas in the tank, or worse in the carburetor.

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Presenting on Backup Power to the Montie Beach Civic Club

The evening of Thursday, September 12th I will be giving my presentation on an Affordable Approach to Whole Home Backup Power to a meeting of the Montie Beach Civic Club. This is the fourth time giving this presentation this summer, and most likely the last.

Each time I give it the slides change a little to reflect the time and place. Also to add little things that I’ve learned  along the way. This time I’ve added the following image which reflects the reality that we are currently in the peak of the Atlantic hurricane season.

Hurricane Season

This week Houston had a near miss with Hurricane Francine. Initially moving toward the Texas gulf coast, it veered northeast toward the Louisiana coast. Nonetheless, it serves as a reminder that we need to be prepared for those events that impact the city. We’ve already suffered a number of days of power outage this year, the result of the derecho and Hurricane Beryl.

In truth, much of the reason for this post is to give me a place to put a link to download the slides as a PDF. That way I can have a URL to be the target of a QR code contained in the slide deck.

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