Lithium Battery

pigag1

Member
Joined
Aug 23, 2018
Posts
29
Location
Cambridge, Ont
Hi, I am thinking about replacing the AGM battery in my 2024 303RLS to a lithium. I read about EPOCH batteries and their reviews were really good. They have one that is very similar in size to my AGM but offers 300Ah, Heated & Bluetooth. The reason for upgrading is that I would like to be able to run my 12 volt fridge, TV and LED lights for 2-3 days without shore power.

Does anybody have any experience with EPOUCH lithium batteries?
 
Thread moved to Electrical System and Wiring.
[MENTION=22656]SolarPoweredRV[/MENTION] may have some knowledge of the battery brand you're asking about.

Rob
 
Hi, I am thinking about replacing the AGM battery in my 2024 303RLS to a lithium. I read about EPOCH batteries and their reviews were really good. They have one that is very similar in size to my AGM but offers 300Ah, Heated & Bluetooth. The reason for upgrading is that I would like to be able to run my 12 volt fridge, TV and LED lights for 2-3 days without shore power.

Does anybody have any experience with EPOUCH lithium batteries?

Looks like those batteries are a bit more expensive than some, but may be worth it. Will Prose, who has helped me learn about the solar and battery world, does a comparison on YouTube: https://www.youtube.com/watch?v=66lHr-DFNIE
 
Hi, I am thinking about replacing the AGM battery in my 2024 303RLS to a lithium. I read about EPOCH batteries and their reviews were really good. They have one that is very similar in size to my AGM but offers 300Ah, Heated & Bluetooth. The reason for upgrading is that I would like to be able to run my 12 volt fridge, TV and LED lights for 2-3 days without shore power.

Does anybody have any experience with EPOUCH lithium batteries?

I whole heartedly recommend upgrading to Lithium batteries.

I would definitely view the video SoundSailor linked above.

I am a bit concerned that a single 300ah battery might not store enough energy to meet your stated goal of 2 - 3 days boondocking without some way to recharge it, either Solar or Generator.

I think, with your modest energy usage as stated above, you could easily add a ground deployed Solar panel (100 Watt +) that would easily allow you to reach 3 days, or more, of boondocking. Another way to meet your stated goal would be to buy a pair of batteries, I think you could reach 3 days of boondocking on stored energy alone with a pair of 300ah batteries.

I noticed that you live a bit far to the North, will you need to run the furnace during any of your boondocking trips? If yes, then you would definitely need some method to recharge the battery daily, because, the furnace eats up a lot of electric energy when it is operating (unless you buy the pair of 300ah batteries).

I would suggest you start with one battery and go camping in a campground with an electric hookup, don't hook your camper up to the electric and camp exactly as you would if you were boondocking. This will let you know how many days you can get by without recharging your battery. Then you can make the decision on buying the second battery and/or adding a ground deployed Solar panel.

Good luck, and please let us know what you decide, and how long you are able to boondock.
 
Last night, I tested my AGM battery in my driveway. I unplugged shore power once the 12 volt fridge was at normal operating temp and left a couple LED lights on. The battery monitor was showing the battery was at 13.6 volt. After six hours, the battery was down to 12.1 volt. This is without opening the fridge doors and using other electric equipment. This is a bit disappointing as I would have expected to get 10-12 hours. I guess I will be pursuing the option of switching to a 300Ah Lithium battery to ensure I have plenty of power when spending a night without shore power.
 
Last night, I tested my AGM battery in my driveway. I unplugged shore power once the 12 volt fridge was at normal operating temp and left a couple LED lights on. The battery monitor was showing the battery was at 13.6 volt. After six hours, the battery was down to 12.1 volt. This is without opening the fridge doors and using other electric equipment. This is a bit disappointing as I would have expected to get 10-12 hours. I guess I will be pursuing the option of switching to a 300Ah Lithium battery to ensure I have plenty of power when spending a night without shore power.

That's not all that surprising. It appears that you have the same frig as I do, mine averages out at about 90 Ah per day. Other "phantom" draws bring total consumption to 125 Ah per day before any other electrical needs. I'd suggest at least 200 Ah, the 300 Ah battery you mention in your first post would be even better.
 
Last night, I tested my AGM battery in my driveway. I unplugged shore power once the 12 volt fridge was at normal operating temp and left a couple LED lights on. The battery monitor was showing the battery was at 13.6 volt. After six hours, the battery was down to 12.1 volt. This is without opening the fridge doors and using other electric equipment. This is a bit disappointing as I would have expected to get 10-12 hours. I guess I will be pursuing the option of switching to a 300Ah Lithium battery to ensure I have plenty of power when spending a night without shore power.

Experiments like yours are the best way to figure out your ACTUAL energy needs.

Personally, we tested our system with a 30 day stay at a campground about an hours drive from our home. During that time, we determined that we had enough battery storage to get by, but we decided to double our battery capacity and we are very happy we did. Now, we have very few limits on our Boondockong adventures.
 
Nothing wrong with testing it with a plug in right next to the trailer. You are paying for it, but if you do not have enough capacity, then you just plug in.

Our first outing was for a couple days. Very hot, we used A/C a couple times. 600ah was not enough. Our second trip [with and extra 600ah] was several days and we left with well over 50%
 
David? when you say you "doubled your battery capacity", could you be more specific please. Are you running a single 200ah lithium battery, or (2) 100's or ? My issues are like many others just getting into the "electric fridge" issue and being able to recharge quickly.

I am very focused on this discussion right now and considering buying either a 100ah lifepo4, or a 200ah lifepo4.
thanks/Gary
 
David? when you say you "doubled your battery capacity", could you be more specific please. Are you running a single 200ah lithium battery, or (2) 100's or ? My issues are like many others just getting into the "electric fridge" issue and being able to recharge quickly.

I am very focused on this discussion right now and considering buying either a 100ah lifepo4, or a 200ah lifepo4.
thanks/Gary

First, in a long thread like this one it can be helpful to "Reply with quote" as I have so that the person you're addressing knows to reply. Or you could tag them, David is [MENTION=22656]SolarPoweredRV[/MENTION]. Either way it just helps to clarify what's going on in the thread.

If you look in [MENTION=22656]SolarPoweredRV[/MENTION] signature, you'll see he has two Tesla electric car batteries, so way more capacity than what we've been discussing. In your case, it would probably be fine to start with a 200 Ah battery if the budget permits. If you're going to be off-grid for longer periods, you may choose to expand your battery bank in the future. A 100 Ah LiFePo4 (lithium) battery would way outperform the lead-acid battery you started with, but you might find yourself wanting more pretty quickly.

In his post (https://www.mygrandrv.com/forum/showthread.php/54420-Lithium-Battery?p=528958&viewfull=1#post528958), [MENTION=39286]Butcher[/MENTION] says that he found 600 Ah wasn't enough and doubled that to 1,200 Ah (that's an awesome battery bank).
 
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First, in a long thread like this one it can be helpful to "Reply with quote" as I have so that the person you're addressing knows to reply. Or you could tag them, David is [MENTION=22656]SolarPoweredRV[/MENTION]. Either way it just helps to clarify what's going on in the thread.

If you look in [MENTION=22656]SolarPoweredRV[/MENTION] signature, you'll see he has two Tesla electric car batteries, so way more capacity than what we've been discussing. In your case, it would probably be fine to start with a 200 Ah battery if the budget permits. If you're going to be off-grid for longer periods, you may choose to expand your battery bank in the future. A 100 Ah LiFePo4 (lithium) battery would way outperform the lead-acid battery you started with, but you might find yourself wanting more pretty quickly.

In his post (https://www.mygrandrv.com/forum/showthread.php/54420-Lithium-Battery?p=528958&viewfull=1#post528958), [MENTION=39286]Butcher[/MENTION] says that he found 600 Ah wasn't enough and doubled that to 1,200 Ah (that's an awesome battery bank).

Ah!, thanks for the tip regarding "reply with quote".
Given the experience we had with the AGM battery, we have kind of convinced ourselves that we NEVER dry camp again. Well I don't think thats very realistic. I think we'd be better of prepared and not need it, as apposed to needing the extra power and not having it. That said just need to figure out which brand/model to try.
Thanks again for the pointers!!
Gary
 
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David? when you say you "doubled your battery capacity", could you be more specific please. Are you running a single 200ah lithium battery, or (2) 100's or ? My issues are like many others just getting into the "electric fridge" issue and being able to recharge quickly.

I am very focused on this discussion right now and considering buying either a 100ah lifepo4, or a 200ah lifepo4.
thanks/Gary

As SoundSailor mentioned, I have two, Tesla Model S battery modules. Each module is 250 amp hours operating at 24 volts. When that gets converted to 12 volts equivalent, it is 1,000 amp hours of storage capacity (250ah × 2 = 500ah at 24 volts × 2 = 1,000ah). This is equal to ten, 12v, 100ah batteries.

When I was looking at installing my Solar system, batteries were much more expensive than they are today. That is why I chose the Tesla battery modules, also, it turned out to be a really cool project!!!
 
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Ah!, thanks for the tip regarding "reply with quote".
Given the experience we had with the AGM battery, we have kind of convinced ourselves that we NEVER dry camp again. Well I don't think thats very realistic. I think we'd be better of prepared and not need it, as apposed to needing the extra power and not having it. That said just need to figure out which brand/model to try.
Thanks again for the pointers!!
Gary

Yes, if you are under prepared with Lead Acid batteries, boondocking can be disappointing (or down right miserable if it is cold outside).

However, if you are properly equipped, boondocking is a fantastic way to camp. Before we installed our Solar system, we used our Champion Dual Fuel (Propane or Gasoline) Generator to power our Camper while boondocking. One of the places we liked to boondock was at the Tampa RV SuperShow in January. Because the nights were cool, we did not need to run the Generator at night (for Air Conditioning). We would usually run it for a few hours in the evening to cool down our coach (from the Florida Sunshine) and ensure the batteries were topped off to run the furnace while we slept.

When planning your battery bank (and Solar system) it is important to know the type of camping you want to do and the number of days you want to boondock (if you want to boondock at all).

The factors to consider when planning are the weather, your refrigerator type and what electric (120 volt) conveniences you want to have while camping, i.e.: entertainment center, morning coffee, C-Pap machines, hair dryers and even running an Air Conditioner. You also want to plan for expansion of your battery bank as your needs change with experience.

It is hard to recommend how much battery capacity someone might need without knowing the answers to the questions above, however, some guidance can be given based on what others have shared on the forum...

Let's presume that you simply want to camp overnight without hookups (at a music concert or a Harvest Hosts), if you have a Propane refrigerator and the temperatures are moderate (you don't need the furnace to blast all night) you could probably camp comfortably with a single 100ah Lithium battery. If you have a Residential refrigerator or a 12v compressor fridge you would need at least 2, 100ah Lithium batteries and 3 batteries would be better. This should set a baseline to start your planning.

Once you start thinking about adding Inverters and Solar panels your need for Battery storage will increase. For example: we have 1,200 Watts of Solar, 800ah (useable) of battery storage and a 3,000 Watt Inverter that provides 120 volts throughout the coach. I consider this a robust Solar system. With this system, we can stop for lunch, or a nap, and run the microwave or air conditioner (for a couple of hours), we can also boondock for 12 - 14 days without needing to find Shore Power. When we are boondocking, it is almost like being at a campground with Shore Power, there are few limitations on which 120v appliances we can operate (obviously, we use Propane for our fridge and hot water). We often sit and marvel at how nice it is to have 120v power throughout the coach.

To get a better idea of how much battery storage you might need, read the thread: "Affordable Solar..." pinned at the top of the Solar and Generators forum.

I would also recommend you read the links in that thread titled: "Cheap Batteries..." and "Lithium over Lead Acid...". In these linked threads are recommendations on which battery brands you might consider and how to avoid buying a poor quality Lithium battery.
 
I went with a 12 volt 300Ah Epoch battery and I am very happy with the results so far. Getting ready to instal an inverter in my Reflection 303 which is inverter prep. I have been reading a lot about this install. I chose the Giandel 3000 Watt inverter and Southwire 41300 Hardwire Automatic Transfer Switch. Many installs I saw on line used a shunt. My question is what is the purpose of a shunt? I don't believe instructions for the instal of an inverter provided by GD say anything about a shunt.

Thanks
 
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I went with a 12 volt 300Ah Epoch battery and I am very happy with the results so far. Getting ready to instal an inverter in my Reflection 303 which is inverter prep. I have been reading a lot about this install. I chose the Giandel 3000 Watt inverter and Southwire 41300 Hardwire Automatic Transfer Switch. Many installs I saw on line used a shunt. My question is what is the purpose of a shunt? I don't believe instructions for the instal of an inverter provided by GD say anything about a shunt.

Thanks

The shunt is part of a battery monitor.

The way it works is that the shunt is installed on the negative side of the system. The shunt is installed right next to the negative battery terminal, this allows you to route all negative cables to one side of the shunt and the other side of the shunt is connected directly to the battery.

The reason you want to have a battery monitor installed when you have Lithium batteries is because, simply measuring the voltage of your system will not give you any useful information on your battery's State of Charge (SOC). Your battery monitor (via the shunt) measures all of the energy used from your battery and calculates the percentage of charge left in the battery, the battery monitor will display the remaining energy as a percentage (note: many battery monitors can also connect with your phone via Bluetooth).
 
Thanks for your response David.
My RV has a Furrion Battery monitor that I thought would provide me this information once it is recalibrated to my new lithium battery.
 
Thanks for your response David.
My RV has a Furrion Battery monitor that I thought would provide me this information once it is recalibrated to my new lithium battery.

Some but not all of the Furrion Battery Monitors are shunt-based. Take a look at your negative battery post. If your coach has a shunt, it should show up there. If there is no shunt, the monitor measures voltage, which is of very little help with lithium batteries.
 

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