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Old 10-15-2020, 12:52 AM #16
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Originally Posted by OYOTA TRD View Post
What portable power stations are you using and your thoughts?

I have a Goal Zero Yeti 400. It is ok for my camping needs, but looking to upgrade to something that lasts longer before recharging. Prime Day has Jackery and BALDR brands on sale, anyone familiar?
I recently bought a Jackery 500 in a group buy, which still may be going on, see this link:
Group Buy: Jackery Explorer Portable Power Stations and SolarSaga Solar Panels

I’m very pleased with it. I run it in pass-through mode; it powers my 12V fridge while driving and the Jackery is being charged from a 12V port (cigarette lighter port) during the drive. In this mode it supplies about 65W to the fridge when it cycles on to cool, 2W when idle. During this time the Jackery draws about 38W to charge itself. This way you can keep the Jackery topped off while driving.

I’ve run the fridge for over 25 hours and the Jackery was only down to 42%. Of course it depends on many factors like ambient temperature, fridge setting, power draw etc., but it works for me.

It’s a “power station” with 12V DC outputs, USB outputs, a 120 VAC output, and can be charged from 12V DC, 120VAC (with an included power brick), or a solar array. Plus you can move it into your house for emergency power.

Check it out to see if the group buy is still going on. Plus there’s a Jackery 1000 model available.
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Old 10-16-2020, 01:50 PM #17
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I was wonder how everyone was "mounting" or positioning their power stations. I love the Jackery as a real quick dual battery and solar all in one package but I find it can be awkward to secure.
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Old 10-16-2020, 04:08 PM #18
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Check out Mobile Solar Power Made Easy! - Mobile Solar Power: Made Easy! DIY Off-grid Solar Power!. The host, Will Prowse, also has a YouTube channel. He is extremely knowledgeable about portable power stations, solar power, and LiFePO4 and other types of batteries.
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Old 10-16-2020, 04:37 PM #19
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The only things that I ever need to charge while we're camping are our phones, a tablet, and a portable fan/LED light. Since I don't need too much power I just use one of these. I've been kicking around the idea of getting a portable fridge but am still on the fence since most of our trips are short enough to use coolers without it being a hassle. If we decide to go the fridge route I would probably get a Jackery power station and a solar panel. I've seen a couple of vehicles on YouTube and Instagram that have these hood mounted solar panels. They seem a bit pricey but I really like the idea of making them look like some kind of hood wrap.
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Old 10-16-2020, 05:42 PM #20
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Here’s a link to a post I made awhile back regarding the efficiency of my Dometic CFX3-35, Jackery 500, and Goal Zero 100 watt suitcase panel.

https://www.toyota-4runner.org/3523311-post59.html
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Old 10-16-2020, 06:02 PM #21
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Quote:
Originally Posted by tylertenny View Post
The only things that I ever need to charge while we're camping are our phones, a tablet, and a portable fan/LED light. Since I don't need too much power I just use one of these. I've been kicking around the idea of getting a portable fridge but am still on the fence since most of our trips are short enough to use coolers without it being a hassle. If we decide to go the fridge route I would probably get a Jackery power station and a solar panel. I've seen a couple of vehicles on YouTube and Instagram that have these hood mounted solar panels. They seem a bit pricey but I really like the idea of making them look like some kind of hood wrap.
Those are really cool! Especially for those that want to keep the roof rack for storage.
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Old 10-16-2020, 06:46 PM #22
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I found that I rarely need or use the AC inverter in these products... almost all of my loads are DC like the fridge.

It's pretty easy to build a battery box and save a ton of cash.

All you need is an case, battery, solar charge controller and/or DC-DC charger, and some connectors.

I basically got the capacity of a Goal Zero 1000 for about 20% of the cost and it actually works better. My fridge was hitting the 12v low voltage disconnect because the Goal Zero output isn't regulated.

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Old 10-16-2020, 06:51 PM #23
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Quote:
Originally Posted by 4RExplorer View Post
Check out Mobile Solar Power Made Easy! - Mobile Solar Power: Made Easy! DIY Off-grid Solar Power!. The host, Will Prowse, also has a YouTube channel. He is extremely knowledgeable about portable power stations, solar power, and LiFePO4 and other types of batteries.
I like watching that guy... he gets so damn excited about batteries haha. Pretty entertaining.

Pretty decent teacher actually but he tends to dislike anything other than LiFePO4 chemistry which is a shame because there are amazing deals out there on standard lithium-ion chemistry batteries.
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Old 10-17-2020, 04:13 AM #24
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Originally Posted by Bumbo View Post
I found that I rarely need or use the AC inverter in these products... almost all of my loads are DC like the fridge.

It's pretty easy to build a battery box and save a ton of cash.

All you need is an case, battery, solar charge controller and/or DC-DC charger, and some connectors.

I basically got the capacity of a Goal Zero 1000 for about 20% of the cost and it actually works better. My fridge was hitting the 12v low voltage disconnect because the Goal Zero output isn't regulated.

Hi @Bumbo , what operating guidelines would you recommend for using these type of batteries to get the best performance and longest life? I have the Jackery 500 WHr Li-ion NMC battery. I contacted the vendor asking about how low I could deplete the battery while powering a DC fridge before recharging. They said not to let it get to 0% but to recharge at about 15%. Does that sound about right?
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Old 10-17-2020, 05:55 AM #25
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Hi @Bumbo , what operating guidelines would you recommend for using these type of batteries to get the best performance and longest life? I have the Jackery 500 WHr Li-ion NMC battery. I contacted the vendor asking about how low I could deplete the battery while powering a DC fridge before recharging. They said not to let it get to 0% but to recharge at about 15%. Does that sound about right?
It most certainly does sound about right if you are trying to be nice to your batteries. Same goes for lead, but lithium has a much deeper discharge allowance.

Generally speaking... If you need the power, you can use significantly more of the stored energy from a lithium cell than from lead without causing harm or damage to the service life of the battery.

If the goal is to significantly increase the service life and general health of a lithium battery, then there are fundamentals worth understanding...

Unlike lead batteries that want to be kept at near full or float/maintenance voltages when not in use, lithium batteries (in an ideal world) want to be stored at their nominal voltage, which is about 50% state of charge.

I have had cells in storage for 4-5 years without any maintenance and did not show any signs of capacity loss, voltage drop, or degradation when stored correctly.

If you ever owned RC toys that uses LiPo batts you might be familiar with the "storage" function of the chargers which do just that, put the batteries at their nominal voltage, or close to it.

Now in the real world, most people are not going to keep their lithium power banks, flashlight batteries, and other devices sitting at 50% all the time. But even on it's worst day, charged to 100% and discharged to 0%, it will likely still have a longer service life than a lead battery.

But if you keep the cycle depths closer to its nominal voltage, for example 80% max charge and 20% max discharge, theoretically that could significantly increase the amount of cycles/service life.... could be hundreds, could be thousands, it just depends on the cell chemistry and quality of batteries used in your Jackery. It's always a good idea to have more power than you need as well because you leave some power on the table with this strategy.

Conversion about quality: I have a friend that did some full charge/discharge cycle testing of some 18650 cells … here is an example of the degradation between a quality brand name cell from Samsung and a Chinese imported cell "Re-Volt"

It held up well to about 360 cycles and then the imported Chinese no-name cell starts to degrade at an expedited rate. It's certainly enough to get a product past its warranty period. I'll have to ask him if he ever did the same test at reduced depth of charge/discharge but it's a clear indicator of "you get what you pay for"



This is the reason I like to build my own... no idea what these OEMs are using. I have limited confidence the commercial portable power packs, but I have not confirmed if the batteries they use are good for the long haul either. That wasn't to discourage anyone from buying one because I know DIY isn't for everyone.

The battery in the above photo came out of a production EV car that was salvaged... it's Samsung SDI cells, and the spec sheet rated for 6000 cycles at 80% capacity retention.

For running a fridge... I don't even worry about it. I'll probably sell the batteries or get tired of them before it's even a concern.

You could get the same quality buying a premium lithium battery from a company like Battleborn, Valence, or other brand of known quality and making your own, but EV cells are pretty easy to source these days for cheap, but you have to do some additional work and wire up a battery management board.

Hopefully not too much rambling, but I felt it was relevant. And that was me trying to keep it short lol...

Last edited by Bumbo; 10-18-2020 at 09:25 PM.
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Old 10-17-2020, 11:24 PM #26
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Quote:
Originally Posted by BlakeA View Post
Here’s a link to a post I made awhile back regarding the efficiency of my Dometic CFX3-35, Jackery 500, and Goal Zero 100 watt suitcase panel.
Same connector for the Goal Zero solar into the Jackery (no adaptor needed)?
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Old 10-19-2020, 11:01 AM #27
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Yes, I think it’s the standard 8mm. The GZ 100 watt suitcase plugs right into the Jackery, no adapters needed. I also bought an extension cable so I could move the panel around To catch maximum sun.
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Old 10-19-2020, 01:21 PM #28
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I have the Jackery 500. Run my diesel heater off it for the RTT. Also have the 100w solar panel. Everything works great.
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