power

On “Solar Generators”

Hi. My name is Michael and I am a pedant. I don’t mean to be, but it really can’t be helped.

I come to this admission when faced with an online discussion of “Solar Generators.” I believe this term arises from really poor use of language.

There really is no such thing as a “solar generator.” Except perhaps the sort of installation found in Nevada’s Ivanpah Dry Lake.

Let me break this down a bit:

Generators

Burn some fuel to create motion, which in turn creates electrical energy.

Predator 13500 Generator

Batteries

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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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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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A few nice accessories for your backup generator

I’m told that accessories are the key to great fashion. I can’t remember where I heard this, but it certainly rings true. I have discovered a few accessories that make life a little better with respect to the use of our backup generator.

Battery Operated Liquid Transfer Pump

It always seems that utility power is restored just after I refilled the generator. I tend to put stabilizer in the gasoline I use. Even so, I don’t like to leave the generator fueled while in storage. I prefer to empty the tank and let the carburetor run dry.

Further, I have never acquired the skills involved in siphoning liquids using suction and gravity. I tried, but quickly gave up. I think this only works in movies. So, after Winter Storm Uri, I ran up the street to the local O’Reilly Auto Parts where I procured a cheap liquid transfer pump.

transfer pump

You can get these on Amazon as well. For under $20 these little devices make it very safe & easy to pump the fuel back into the same containers I used to purchase it. Thereafter, I typically just pour it into our cars.

After several days of listening to generators drone on endlessly, silence is most welcome. Nothing is quite so annoying as a neighbor, with an especially noisy generator, attempting to “burn off” the fuel in the tank by letting their generator run for hours and hours with very little load.

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On Batteries for Whole Home Backup Power

EcoFlow Ultra BasicIn recent weeks I’ve twice given my presentation on an Affordable Strategy for Whole Home Backup Power. The first time was online using Zoom. The second time was live at the July meeting of the Norhill Neighborhood Association. Both went very well. But as ever, the presentation changed a little from one outing to the next. In particular, a Norhill resident had a comment about battery storage.

This inspired me to show a couple of slides I had originally skipped in the interest of time. Simply put, I’m not a fan of whole house battery backup. And I’d like to explain the logic my position.

For the love of sunshine

Our is a modest home. A hundred+ year old Craftsman Cottage built by William Wilson Realty Company. This kind of home has a roof that’s all angles. There’s just not much contiguous space upon which to locate solar panels.

Further, one of the truly great features of our older neighborhood are all the mature trees. The place is just rich with grand old Maples, Pecans, Oaks and Sycamores. Even the occasional Loblolly pine. Our property has a mature Pecan in the center of the back yard.

All these big ‘ole trees tend to shade single-story homes like ours. Those houses that do have solar installations are mostly two-story homes, that manage to peer out beyond the treetops.

Oaks over the east end of Bayland Ave After Hurricane Beryl

So, we don’t have solar panels on the house. Many companies have tried to sell us on the idea, but in the end, it’s just not practical for this house, at this location. That makes this all about batteries, and batteries alone. Not solar+batteries.

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Webinar: An Affordable Strategy for Whole Home Backup Power

Slide1

As promised some weeks ago, I’ve created a presentation that describes our experience arriving at a strategy for whole home backup power. Since there seems to be some interest in this sort of thing, I’ll be presenting it via Zoom on Thursday, July 25th at 7pm CDT.

The presentation draws upon the experiences from Hurricane Ike in 2008, Winter Storm Uri in 2021, the derecho in and Hurricane Beryl in 2024. It traces our evolution from a wholly ad hoc approach, to running our entire home (including 4T AC) from a portable inverter.

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