svetz
Works in theory! Practice? That's something else
Hurricane season runs through November, but September is the historically most active season.... so I find myself wondering what I should set the off-season charge voltage to.
When storing Li batteries, the recommended SoC is usually around 40%. What do you do when batteries are for emergency use? Keeping them at 100% all the time isn't good for them, although I've yet to see anything that quantitatively tells me how bad. Ideally, they'd be around 40% and brought up to full charge before you need them. But, you don't know what an emergency will occur, and keeping your batteries nearly empty won't help you. So...what to do? When I previously contacted tech support they suggested 90-95%; but did so without asking me any particulars and one size doesn't fit all.
Experience says I have two types of emergencies, one is a hurricane-induced outage that lasts very long. The other is a short duration outage of a couple of minutes to hours that could occur anytime.
From battery university we know the closer you get the charge/discharge cycle around the 50% mark the greater the life-cycle.
The warranty of the Encharge 3 at 100% SoC is >70% capacity, up to 10 years or 4000 cycles.
Each Encharge 3 unit has 3.36 kWh of usable power of 3.5 kWh. 3.36/3.5 = 96%. Easy to see why they have 70% capacity at 4k cycles.
If I was cycling every day and wanted to hyper-mile the batteries 75% to 85% would probably be a good target. As these batteries are only for emergency power, in the off-season the power might only be off for an hour at a time. That's about 25% capacity without taking any actions to curtail consumption. Call it 15% above and below 50%, so in the off-season here perhaps a 65% SoC?
Even in hurricane season, with storm guard it might make sense to keep the SoC lower. What's really missing is understanding the degradation due to long-term stead capacity at a single SoC. If you have thoughts on that, I started a new thread on the topic.
When storing Li batteries, the recommended SoC is usually around 40%. What do you do when batteries are for emergency use? Keeping them at 100% all the time isn't good for them, although I've yet to see anything that quantitatively tells me how bad. Ideally, they'd be around 40% and brought up to full charge before you need them. But, you don't know what an emergency will occur, and keeping your batteries nearly empty won't help you. So...what to do? When I previously contacted tech support they suggested 90-95%; but did so without asking me any particulars and one size doesn't fit all.
Experience says I have two types of emergencies, one is a hurricane-induced outage that lasts very long. The other is a short duration outage of a couple of minutes to hours that could occur anytime.
From battery university we know the closer you get the charge/discharge cycle around the 50% mark the greater the life-cycle.
The warranty of the Encharge 3 at 100% SoC is >70% capacity, up to 10 years or 4000 cycles.
Each Encharge 3 unit has 3.36 kWh of usable power of 3.5 kWh. 3.36/3.5 = 96%. Easy to see why they have 70% capacity at 4k cycles.
If I was cycling every day and wanted to hyper-mile the batteries 75% to 85% would probably be a good target. As these batteries are only for emergency power, in the off-season the power might only be off for an hour at a time. That's about 25% capacity without taking any actions to curtail consumption. Call it 15% above and below 50%, so in the off-season here perhaps a 65% SoC?
Even in hurricane season, with storm guard it might make sense to keep the SoC lower. What's really missing is understanding the degradation due to long-term stead capacity at a single SoC. If you have thoughts on that, I started a new thread on the topic.
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