Tag Archives for " batteries "

Solar Batteries Lifespan: How Long Will Your Deep-Cycle Last?

solar batteries lifespan

How long do all the different kinds of deep-cycle batteries last?

These days, when most of us are going to make a big purchase, the first thing we all do is go online and research prices. If you’re thinking about adding batteries to your solar installation, you’ve probably already done this.

However, for energy storage at least, that initial purchase price is only half the story. You also need to take into account your solar batteries’ lifespan. After all, if you found a a giant solar battery for $100, but it only lasts 6 months – is it really a good deal?

How long your batteries last, how far you can discharge them, and how to keep them running optimally are all factors to consider before making any decision. If it sounds like a lot, don’t panic! Let’s dive in to all of it now.Continue reading

Can You Use Costco Golf Cart Batteries for Solar?

costco golf cart batteries store

Is there an affordable battery backup option for your solar array at your local warehouse store?

You might’ve heard that Costco sells decently-priced golf cart batteries that are great for solar applications like small off-grid systems or campers. You can find references to this idea in a few different forums, but we decided to take a bigger dive to get the scoop on whether Costco golf cart batteries are worth our time. Turns out, they’re actually a pretty good deal!Continue reading

How Much Does the sonnenBatterie Cost?


How much does the sonnenBatterie cost compared to Tesla’s Powerwall?

With the German battery storage manufacturer sonnenBatterie entering the US market and announcing a new, low-cost option for the US, interest in their products seems to be gaining traction on this side of the Atlantic. Let’s take a look at who sonnenBatterie is, how much sonnenBatterie costs, and how they compare to their competitors.

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The “Tesla Off Grid Generator” Scam vs Elon Musk’s Powerwall


Is the Tesla Off Grid Generator legitimate or a scam?

Nikola Tesla was a famous engineer and inventor best known for his contributions to electricity supply systems. Many have tried to imitate his greatness but few have succeeded. How can you tell if machines currently on the market that bear Tesla’s name, such as the Tesla “Off Grid Generator”, are fact or fiction?

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Problems with Solar Energy – Why Solar Hasn’t Taken Over the World (Yet)


Why are we experiencing problems with solar energy?

If solar is so absolutely great, and we’re hurtling towards a climate catastrophe, why does it only power about 2% of the world? If it’s the panacea to our problems, why aren’t solar panels adorning rooftops the world over? What are the causes behind the problems with solar energy that we face?

To answer such questions, we at UnderstandSolar have dug into the facts and present the fruits of our labor below – an unfortunate tale of G20 hypocrisy, the Concorde fallacy (find out what this is later), and the sobering fact that we still need fossil fuels to power our planet (at least for now).

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How to Store Solar Energy with a Solar Battery


Choosing a solar battery to store your solar energy.

Solar energy from your roof sounds simple, right? The sun shines, electricity is created, and it powers your home. But a lot of people wonder… what happens at night, or on cloudy days when your panels don’t produce? Wouldn’t it be nice to store the extra power you create on a bright, sunny afternoon with a solar battery so you can always make use of solar energy?

Solar battery storage isn’t just a household problem, but a challenge the solar industry is tackling as a whole. Solar is an effective, clean, affordable form of power, but it won’t truly be able to take over until storage technology catches up. The industry has been taking off in the past few years, and the race for solar storage has been dubbed a ‘technology arms race’.

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How to Get Solar Power Without Batteries


Installing solar power without batteries

How do you store the energy, anyway?

If you’re interested in purchasing a new solar system, then you likely have a lot of questions about how the system works and what you will need to suit your individual needs. One question that comes up often is whether or not a solar system needs a battery and how to get solar power without batteries. It’s really a trick question because although most systems don’t use batteries at all, but use the electrical grid as a sort of flexible battery storage and on demand power system. If this makes no sense, that’s fine, because we’re going to explain!

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Tesla Powerwall 2 Review

Tesla Powerwall 2

Here we review the Tesla Powerwall 2, which aims to be a simple solution to the difficulties with solar power, by making sure you’ve actually got the power when you need it.

If you are at work for most of the day, almost all of the power consumed by your house is used in the evenings, when your solar panels are no longer generating electricity. To use the solar power generated, you could consider using timers to move power-hungry tasks like laundry and dishwashing into the day, where they can take advantage of your solar system. Depending on how big your solar array is and how much power your house uses.

Alternatively – you could look at buying a battery. When buying a battery for your solar system you need to consider the costs involved. You would need to spread the cost of the battery over its lifespan, and take into account how often you’ll cycle it – the more you use it the cheaper it will work out on a per-kilowatt-hour basis. You might find that it works out cheaper for you to use grid power in your area, though you might still consider buying a battery if you need short term protection from black-outs. Or even better than just buying a battery, you could buy a Tesla battery, better known as the Powerwall 2.Continue reading

How Is Solar Energy Stored?


Solar energy storage is often misunderstood.

There’s a lot of information online and it’s often in the news claiming it’s the next big thing in the solar industry.  You might have heard that in places like Hawaii and California it’s even cost effective to install a solar system with storage today. But what does that mean exactly? What exactly is solar plus storage and how does it work for homeowners connected to the utility grid?Continue reading

Include Batteries with Your PV to get a 30% ITC for Storage

PV storage

With the increased interest in battery storage, as a companion to a PV installation, the IRS, in October put out a request for comments on ways to improve the battery storage 30% ITC.

The IRS will issue a final ruling at the end of 2016 on the specific conditions under which batteries are eligible for the 30% ITC

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