Stop Guessing! Master Solar Battery Ratings Today!
2024 ж. 2 Мам.
2 817 Рет қаралды
In this video, Joe Hammond, equipped with a SunSynk 5.32 kWh battery, takes you on a journey through the intricate world of solar battery ratings. Delve into the fundamentals, from understanding kilowatt-hours to unraveling C-ratings and beyond.
Installing a battery onto a solar PV system 👉 • Installing a Battery o...
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Time Stamps ⏱
00:00 We've seen the benefits of solar batteries
00:26 Let's break down the terminology
00:45 What is a kilowatt-hour (kWh)?
01:37 What are C-ratings?
03:03 What is the State of Charge (SOC)?
03:36 What is the Depth of Discharge?
04:22 How can other variables effect battery lifespan
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#solarinstallation #solarbattery #batterystorage
Thanks guys. However, I take issue with one point you make. The 6000 cycle life isn't a 'life'. The battery wont explode or be dud at the end of those cycles. It is about guarranteed capacity aat the end of those cycles. Saying 'your battery will roughly last 16 years' is thus misleading. It may well still hold most of its usuable capacity at the end of those cycles. In fact, it may well 'last' an aweful lot longer before it actually fails.
Btw 0.5 * 0.5 is 0.25.. I think you meant to say 0.5 + 0.5 for the battery discharge..
Do SunSynk recommend that your main incoming fuse be downgraded from 100amp to 80amp so the 100amp rated domestic CU/DB does not get over cooked?
If I really didn’t like someone and never had to see them again I’d fit a sunsynk.😂😂😂😂
The explanation on the C rating is flawed. Talking about discharge rates of 2.5 kW per hour is just plain wrong. Discharge (and charge rates) can be expressed in either of 2 ways: 1. In Watts (and multiples of this unit including kW) 2. In Amps (and multiples such as milliamps). There is no hour unit added to it. Saying it can discharge "X watts per hour" is wrong. The formula you need is as follows: (1) *Determining the Maximum Charging or Discharge Rate in Watts From the Manufacturer Specified C rating* . PMax = E x Cr Where: PMax - Maximum charge or discharge rate in watts E - the storage capacity of the battery in Wh Cr - charging rate. For example: A battery capacity of 2.5 kWh. The manufacturer specifies the C value as 0.5 E= 2500 (as it has to be in Wh and not kWh) Cr =0.5 The maximum charging or discharging power is: 2500/0.5 watts = 1250 watts. If you want to know what the current is in amps, then divide the charge/discharge rate in watts by the voltage. Eg. If the battery voltage is 24 volts, then a discharge rate of 1250 watts is: 1250/24 = 52.1 amps Easy. (2) *Calculating the Quickest Amount of Time to Charge or Discharge the Battery* How long does it take to discharge it? The C rating is the maximum charge or discharge rate expressed as multiple (or fraction) of the battery's charge capacity. A discharge rate of 1C indicates the battery's entire capacity is discharged in 1 hour. So a battery that has a rating of 0.2 C, means that (1/0.2) is the number of hours to discharge the battery at its maximum rate. 1/0.2 = 5 hours. A second example: If the C rating is 3 then: 1/3 = 0.33 hour, which is 0.33*60 minutes = 20 minutes. Remember, this is the maximum charge or discharge rate, which is the shortest amount of time; you can can charge or discharge at a lower rate which means it will take longer. In terms of a mathematical expression: Minimum time in hours to charge or discharge the battery is: Tminimum = 1/Cr Where: Tminimum - Time in hours Cr - C rate figure provided by the battery manufacturer Eg: A battery is stated as having a C value of 0.5 What is the quickest time we can discharge it, the minimum length of time to run the batttery down? C = 0.5 Tminimum = 1 / 0.5 = 2 hours (3) *How to calculate how long the battery takes to charge or discharge for a specified charging/discharging power (in Watts)* . The formula is: DischargeTime = E/P Where: DischargeTime - time to charge or discharge the battery, in units of hours E - Energy storage capacity of the battery in Wh P - discharge or charging current in W (watts). Example: A battery of 2.5kWh. we discharge it at a rate of 60 watts. How long does the battery last? E= 2500 P = 60 DischargeTime = 2500 / 60 = 41.66 hours. There endeth the lesson.
Long winded way of expressing the physics taught in year 7 of any secondary school in the country.
@@michaelwinkley2302 Stop bull sh..tting. I have been through secondary school and they do not teach it at all. Why do you insist on lying? And as for being long winded. It is as concise as it needs to be. It presents the formulae, explains the terms and demonstrates with examples. It explains concisely and fully. Would love to see you do better. But you can't.
@@deang5622 you never got taught Energy = Power x Time, or Power = Voltage x Current...? What kind of school did you go to? ? Don't conflate them not teaching it with you not paying attention.
@@michaelwinkley2302 Nothing to do with it mate Read what I wrote. We are talking capacity of batteries, not power. Do you understand the difference between power and capacity? A lot of people don't. Are you one of them? We are talking here about using the charging rate figure C. That is the whole point of the video and my post. Your power formula does not include that, so your power formula is therefore completely useless. My equations do include C, yours do not. Perhaps you go watch the video again to understand what the key point of it really is. It's about using C provided by the battery manufacturer. All you have done is to quote a power formula, big deal. Anyone can quote formulae that are not relevant. You have not even explained how to take the value of C provided by the battery manufacturer and use that. Your post is therefore completely useless. And yet you have the audacity to criticise my post which actually does educate people on how to use it? Dude, are you for real? Seriously? Either put up, put your money where your mouth is, and teach people or go away and STFU. Which is it to be? In your desire to show off, you completely missed that didn't you?
Energy is power X time kWh = kW x h
If your MCS then it's another course and an inspection
A 5.32kWh battery doesn't store 5,320W. It stores 5,320Wh. What's the point in clarifying things when you make the most basic of mistakes?
I have found this to be a common mistake made by many people,and sadly I have seen it made by qualified electricians. It shouldn't be happening. I do think part of the problem is that there are no prerequisite qualifications for students going onto vocational/apprenticeship electrical courses. A minimum requirement of GCSE maths, physics and English would go along way I judge to improving the performance and level of understanding of our electricians. And let's be honest, asking students after two years of full time study in school to pass just 3 GCSE's is not unreasonable. The vast majority of people are passing a considerably higher number. There are very many courses which have pre-requisite entrance requirements and for good reason; I see no reason why the City and Guilds electrical courses and electrical apprenticeships should be any different.
Yeh, it's pretty poor isn't it. He also said, "The Sunsynk is rated at 0.5C and that means it can discharge two and a half kiloWatts per hour". Which really confirms that he doesn't understand energy and power. Since a Watt is a Joule per second, just imagine him trying to explain what he means by 2.5 kiloJoules per second per hour.
Yes, with this mistake at around 1:00 and others strewn throughout the video, I really think eFIXX should consider pulling this video. I wouldn't normally nit-pick, but this video is sold as helping people "master" the technology and terminology and it's just not accurate.
There is no follow on video to click on
Apologies. Here's the video 👉kzhead.info/sun/ZNSyfs-qsKGwp4E/bejne.html
argh you point to the next video which is not there
Apologies, fixed it now. Here's the video 👉kzhead.info/sun/ZNSyfs-qsKGwp4E/bejne.html