June 27, 20206 yr I have a 5.5 kw solar system with a goodwe inverter and pylon batteries 7 kw... i can use different settings: or discharge the batteries every night to 60% of their capacity, or keep the batteries full at 100% all the time. wonder what the best option is?
June 27, 20206 yr 7 minutes ago, Maxibelgium said: wonder what the best option is? In times of no load shedding, use them and by doing so, recover your money. In time of known load shedding, keep them charged.
June 27, 20206 yr Author Will discharging every night to 60% will have an impact on their lifecycle? We are currently overseas for at least 4 more months, so load-shedding has no impact on us..
June 27, 20206 yr 1 hour ago, Maxibelgium said: I have a 5.5 kw solar system with a goodwe inverter and pylon batteries 7 kw... i can use different settings: or discharge the batteries every night to 60% of their capacity, or keep the batteries full at 100% all the time. wonder what the best option is? actually an interesting question I know pylontech mentions a typical amount of cycles for these batteries, i cant recall the exact amount, but if the batteries are kept at 100% how does it impact lifespan, is it still around 10-15 years if you almost never cycle them?
June 27, 20206 yr On that topic , Is a cycle considered from 100 percent down to 10 percent? Is that the same as 2 cycles of 100 to 60 percent or are those considered 2 cycles ?
June 27, 20206 yr 8 hours ago, Maxibelgium said: I have a 5.5 kw solar system with a goodwe inverter and pylon batteries 7 kw... i can use different settings: or discharge the batteries every night to 60% of their capacity, or keep the batteries full at 100% all the time. wonder what the best option What settings do you use to allow you to discharge at a specific time?
June 27, 20206 yr 32 minutes ago, Anish said: On that topic , Is a cycle considered from 100 percent down to 10 percent? Is that the same as 2 cycles of 100 to 60 percent or are those considered 2 cycles ? I discharge by 10% daily, after 3 months it's registered 8 cycles...Not sure how it calculates the cycles used.
June 27, 20206 yr 1 hour ago, FixAMess said: I discharge by 10% daily, after 3 months it's registered 8 cycles...Not sure how it calculates the cycles used. So it seems that a cycle is 100 percent of the battery capacity
June 28, 20206 yr There is software, battery view that you install on your pc and then connect to the master and it will give you all the info you require. See here, half way down the post. https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/ If you need a cable PM me and I'll send you the contact details of the person who made my cable for me.
June 28, 20206 yr 3 hours ago, FixAMess said: There is software, battery view that you install on your pc and then connect to the master and it will give you all the info you require. See here, half way down the post. https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/ If you need a cable PM me and I'll send you the contact details of the person who made my cable for me. Does anyone know if there is software like Batteryview available for Dyness batteries?
July 14, 20205 yr Back to original question - Is it better to cycle (exercise) a Pylon, or keep it charged? (For this question please disregard Eskom savings, this is purely a question of battery longevity). They say better not keep it at 100%. No problem to keep it at 50% - 60% for extended periods... To phrase it differently - what degrades a Pylon more, keeping at high charge or cycling up and down to say 60% daily?
July 15, 20205 yr Author That was the answer i was waiting for...so i keep the same settings: excercise, down to 60 % every day..thx for the advise!
July 15, 20205 yr I cycle mine daily, no more than 40% or 50%, but in doing so I am losing 0.1% of capacity for every 10 cycles. So after 130 cycles the bank have lost 1.3% of capacity. At that rate they will be at 80% usable capacity after 2000 cycles.
July 15, 20205 yr Author So, if you discharge only at 80% the lifespan of the batt will be longer, Is that correct..?
July 15, 20205 yr In essence if you don't discharge the batteries very deeply, they should last longer.
July 15, 20205 yr On 2020/06/27 at 12:30 PM, Maxibelgium said: nt settings: or discharge the batteries every night to 60% of The optimal solution is to never charge your battery to > 90% and to never discharge below 20%, so the SoC should always be between 20-90% If you're overseas, let the batteries discharge to Soc of 60-70% and leave them there.. Recharge fully every month or so and then discharge back to 60-70%. Unfortunately the Goodwe does not have the option to limit charging , only to set discharge limits. Edited July 15, 20205 yr by FixAMess
July 15, 20205 yr 18 minutes ago, francois said: I cycle mine daily, no more than 40% or 50%, but in doing so I am losing 0.1% of capacity for every 10 cycles. So after 130 cycles the bank have lost 1.3% of capacity. At that rate they will be at 80% usable capacity after 2000 cycles. How do you know this, where did you measure it?
July 15, 20205 yr Just now, FixAMess said: How do you know this, where did you measure it? I am using ICC to monitor my setup and the Pylontech BMS sends the info through to ICC. I've been told that the rate of degradation I am experiencing is normal, but at that rate I will be left with only 40% capacity after 6000 cycles.
July 15, 20205 yr 4 minutes ago, FixAMess said: How do you know this, where did you measure it? You can also connect your Pylontech to your laptop and use the Batteryview software to get the info.
July 15, 20205 yr 2 hours ago, francois said: I am using ICC to monitor my setup and the Pylontech BMS sends the info through to ICC. I've been told that the rate of degradation I am experiencing is normal, but at that rate I will be left with only 40% capacity after 6000 cycles. What size system do you have? If its 5kW your 2 batteries must be battling to keep up withe the demand, so your SoC curve will be a steep downward or does your load not draw much?
July 15, 20205 yr 3 minutes ago, FixAMess said: What size system do you have? If its 5kW your 2 batteries must be battling to keep up withe the demand, so your SoC curve will be a steep downward or does your load not draw much? 3kw system, I am limiting the max draw from the batteries to 1000W via the inverter settings.
July 15, 20205 yr 8 hours ago, FixAMess said: The optimal solution is to never charge your battery to > 90% and to never discharge below 20% Unfortunately the Goodwe does not have the option to limit charging , only to set discharge limits. Is there really no way to limit with the Goodwe? What about setting the battery as "Other" (not specifying its a Pylon) and setting custom parameters? Or is it rather recommended to stick to setting specifically Pylontech (maybe one needs to set this for correct communications with the BMS?) Ultimately I really would like to set the battery to charge only to +- 80% (with on grid discharge to 40% DOD). This will keep the battery at between 60% to 80% while connected to the grid. Furthermore, I'd like to limit the charge / discharge during grid connect to only 15A or so. Worth doing to increase battery longevity? Or rather stick with Pylontech battery settings (which cannot be changed)?
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