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deep cycle batteries

Solar system balancing act

Life with a small solar system is a balancing act. We have lived 8+ years now with our small solar system, tweaking it, adding to it, improving it, trying to balance our system vs the power load. Of course we are running a small load most of the time, a couple of laptops, the wireless network for said laptops, a few lights, a 12 volt water pump, a small radio, and the fridge, THAT is what takes up the most power at any given time.

Our fridge is very efficient, it started out life as a small chest freezer, we use an external thermostat (originally designed to turn small chest freezers into kegeraters), we set the temp on refrigerator temps, when it detects the correct temp inside of the box, it cuts off the power to the unit, you can read more about that here. This last winter, we pushed the fridge outside to the front porch, which meant the box didn’t have to work as hard to keep the cold temps inside.

The biggest balancing act for us is the day length vs the outside temps. During the winter, we have shorter days, which means fewer hours in which to charge our solar system, but since the outside temps are cold, the fridge doesn’t have to run as often, sometimes not at all.

During the summer months, it’s warmer outside, making the fridge run more often, but with the longer day length, there are more hours of sun to charge our batteries, so all in all, it works out pretty well, as long as we pay attention to the upcoming weather and moderate our power useage as necessary.

With the warmer temps usually come our rainy season or monsoon season, a few months where we tend to get rain nearly everyday, having overcast skies also limits the amount of solar power we get, though our panels do get some charge even with clouds present, just not the full amount of charge as a sunny day.

I have some exciting news, I have been given the opportunity to review another battery desulfator, I did a review last year on the Whizbang Plus battery desulfator (part one and part two), they worked, but were small, you pretty much have to have one per battery, this other company’s claim to fame is their second generation battery desulfators are designed to work in off-grid situation on larger battery banks, there is much more to this system. I’ll keep you in the dark about it for now, but be looking in the next week or so, as soon as I get the desulfator, which is on its way here now, I’ll do a first impression review, hook it up and let you know what I think about it, I will say that it has many more features that are going to …

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Community

New golf cart batteries

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Today was the first full day on the new batteries, we had everything hooked up to them, including the new chest freezer to refrigerator conversion, about a month (or so) ago our old one smoked on us, fortunately it happened during the day and I was there to catch it, it might not have gone any further, but as far as I’m concerned, when you see smoke, fire usually comes next. I’ll do another writeup on the new fridge very soon, until then you can read about how I DIY’d the conversion here and here.

Our previous batteries were marine type deep cycle batteries, I’ve been told on more than one occasion that those types of batteries aren’t true deep cycle batteries, in fact the newer ones being sold have cold cranking ratings on them instead of amp hours, and that has little (or nothing) to do with being deep cycle, that has to do with starting motors and such. Those are a hybrid of regular and deep cycle batteries, more robust than a standard car or truck battery but not as heavy duty as a true deep cycle battery.

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Off-Grid hiccups

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A while back my current deep cycle batteries began to get weak, they would charge up quickly and not hold much of a charge, unfortunately the batteries are the part of the off-grid system that need to be replaced on a semi-regular basis. I am hard on my batteries, that has never been a secret. This next week I plan on buying four 6-volt deep cycle golf cart batteries. In the past I have used marine type deep cycle batteries, they are more heavy duty than regular automotive batteries, but aren’t near as hearty as golf cart batteries.

As my current batteries began getting weaker and weaker, it began creating problems with my inverter, causing it to go into fault mode for a few seconds, meaning it would cut off the power during that time, it only did it during the day when the batteries were charging or fully charged, never at night, it took me a while to figure out where the problem was.

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Battery desulfator review part two

A couple of months ago, I began testing a battery desulfator called the Wizbang Plus, it’s a simple device that you attach to your batteries, it creates an electric pulse that essentially “knocks” the sulfation off of the plates inside the batteries. Sulfation is the reason why batteries eventually fail. They hold less and less of a charge until they need to be replaced.

When I first hooked up the desulfator, I used it on 2 separate systems, an older battery on one and newer batteries on another. On the older battery, I’ll say that it seemed to work better, I could see a significant difference, enough that I am going to keep it hooked up, it is a slow process though.

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Battery desulfator review part one

I have been researching ways to desulfate batteries, I am finding most people saying that it’s snake oil, that it can’t work… some that are saying that seem to be repeating what they have heard from others, they aren’t speaking from experience, I wanted to TRY something before blowing it off as snake oil… There are 2 main ways I’ve discovered to desulfate a battery, one is chemically, the other is electronically.

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