I have 4 LiTime 230Ah batteries, or that is how they label it, but the BMS is only able to supply 200 continuous amps so according to your definition, I have a 200Ah battery? At least that is how I understood your example.

@TravelingLightReflections

11 күн бұрын

Your capacity should be at or very close to the rated capacity. Also, LiTime is a reputable company so they should definitely be at or very close to the rated capacity. What I am saying in the video (if you have only 1 230Ah battery) is that the concept of Amp Hours says you should be able to deliver 230A for 1 hour or 460 A for 1/2 hour or 115 hour for 2 hours. Being as you have 4 X 230 you could deliver 920A for 1 hour or 460A for 2 hours or 230A for 4 hour. To more directly answer your question. Your LiTime 230A battery has a 200A BMS. This limits each battery to only 200A. (the math still applies but your BMS limit each battery to 200A. So, if you only had 1 battery you could, at maximum deliver 200A but for 1.15 hours not 230 for 1 hour. This is 200A for1 hour and 9 minutes for a 230AH battery with a 200A BMS. However being as you have 4 230 Ah and assuming they are set us a 1S4P you can deliver a max of 800 amp in 1 hour and 9 minutes. If they are in series then the max current would be the maximum of the # of batteries in parallel. For example, if you have a 24V system of 2S2P you would be able to deliver 400A but a 24V. Please let me know if this makes sense. In summary, the BMS does not have anything to do with the battery capacity. One of it's jobs is limiting the current, going both in and out of the battery. The stated capacity is independent of the BMS performance. However. As you add batteries in parallel you can add the current limits of the BMSs. If you tell me you battery set up I can share more.

@azycray4801

11 күн бұрын

@@TravelingLightReflections Thank you for the detailed explanation. My batteries are in 4S for my Growatt 5000 ES. But no need to go any further, I get it now. I have 230Ah capacity, I just can't deliver it all in one hour because of the BMS limitation.

@TravelingLightReflections

11 күн бұрын

@@azycray4801 Yes exactly as you said about the battery's BMS limitation. Your system is 48V with 230 Ah of capacity. The next and better way to describe batteries is to use Watt Hours instead of Amp Hours. Where Amp Hours is good to discuss many aspects of battery usage it does not take the voltage into consideration. Watt Hours does. Watt Hours is the Amp Hours of a battery, multiplies by it's nominal voltage. For example: 230Ah X 12.8V = 2944 Wh. Or in you case, 230Ah X (12.8V X 4) = 11,776 Watt Hours. Another example of this is. someone can say to you, "I also have 230Ah". However if they have a 12V system, you both my have the same Amp Hours but you have 4X the Watt Hours. So... why did I make a video about Amp hours and not Watt Hours? Because understanding Amp Hours is very important and often misunderstood by beginners to battery systems. Also, it still very useful and finally, it needs to be understood before one can understand Watt Hours. I have an article about Watt Hours on my website. It is definitely time for me to make it into a video. www.travelinglightreflections.com/what-is-an-watt-hour-ah

Shouldn’t you be taking into account the voltage of the battery and then calculating the watt-hours, which would indicate how much energy is stored in the battery?

@TravelingLightReflections

22 күн бұрын

I agree and you are absolutely right watt hours are a much better and precise way to measure energy. However I made this video to be a simple as possible. An understanding of amp-hours is needed to understand watt-hours. I have an article on my website about watt-hours. www.travelinglightreflections.com/what-is-an-watt-hour-ah. I actually have a written version of this video too. Maybe I should make the watt-hour one into a video too. The battery world has slowly moved from Reserve Capacity to Amp Hours and now Watt Hours. Mostly because lithium has a different voltage than lead acid, it is import to compare using watt-hours. However, when we are reading a battery monitor to see the State of Charge (SOC), we use Amp-Hours. Thanks for your comment on this.

Your video is why the AH rating is so confusing. AH means nothing without voltage. Which battery has more capacity? A 6 volt 200 AH battery or a 12 volt 200 AH battery? Also, the true AH both into and out of a battery changes depending on the rate of current. A 100 AH battery may output 120 AH at a 1 amp rate but only 80 AH at a 100 amp rate. Which brings up your fallacy of AH rating: It is not the number of AH at the 1 hour rate, it is the number of AH at the 20 hour rate - the 20 hour rate is the industry standard.

@TravelingLightReflections

7 күн бұрын

AH has nothing to do with voltage! The video is not about Watt hours nor is it about reserve capacity. It is about Amp Hours. Yes voltage is very important when specifically comparing the capacity different batteries and when using Watt hours. However, this video is not about Watt hours. It is imperative that new or beginning RVers, boaters, ect have a firm understand of Amp hours before they begin to understand about Watt hours. However, there are many people who do not understand Amp hours and many will never even need to understand Watts hours unless they are comparing power systems or calculating how much energy an appliance uses. 90% of battery users are only caring about how much energy is left in their battery, leaving their battery or being charged back into the battery. Amp hours is more than sufficient for these people . This video explains that and is for them. Reserve capacity used the 20 hr standard, today people are moving to lithium batteries which are measured in Amp hours and Watt hours. The capacity of lithium does not change to the extreme that lead acid does when put under heavy loads. The internal resistance is far less than lead acid. Also, shunt battery monitors are very accurate when measuring battery charger and discharge. BTW, If you care, the unit Ah is Amps X 1 hour.

@TheCSRTech

7 күн бұрын

@@TravelingLightReflections You need to revamp your definition of battery capacity - it has to do with stored energy - not amps x hours.

@TravelingLightReflections

7 күн бұрын

@@TheCSRTech I am not interested in arguing with you but I and the rest of the world will strongly disagree with you. Find any reputable source that will state that Amp Hours is NOT a measurement of Stored Electrical Energy. I have been using Ah to measure battery capacity for over 25 years. Did you learn some magically physical theory that no one else knows. Seriously though, where are you coming from? I am baffled at your confusion or stubbornness of this basic and common understanding. In case you have not noticed, I have spent time communicating with you and being respectful. Now you are wasting my time because you are unwilling to learn something or agree with a concept that I am an expert in. Here, I did the google search for you. Choose one! www.google.com/search?q=what+is+an+amp+hour&oq=what+is+an+amp+h&gs_lcrp=EgZjaHJvbWUqBwgAEAAYgAQyBwgAEAAYgAQyBwgBEAAYgAQyBggCEEUYOTIHCAMQABiABDIHCAQQABiABDIHCAUQABiABDIGCAYQRRg8MgYIBxBFGDyoAgCwAgA&sourceid=chrome&ie=UTF-8

Terrible video just going through basic math without explaining anything about what an amp hour means practically

@TravelingLightReflections

Ай бұрын

I am surprised and baffled at your response. This video is exactly about explaining what an amp hour is , what it means and its practical use. I made the video to help people understand what an Ah is and how it is used, so if you can tell me what you feel is missing I would love to hear it.