opinion:frater_secessus:charging_faster
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opinion:frater_secessus:charging_faster [2020/04/18 13:22] frater_secessus [exceptions] |
opinion:frater_secessus:charging_faster [2020/04/18 13:30] frater_secessus [charging faster isn't always better] |
There is a common misperception that charging one's battery banks //faster// is //better// or worth throwing more money at. Here are some reasons it is not always true: | There is a common misperception that charging one's battery banks //faster// is //better// or worth throwing more money at. Here are some reasons it is not always true: |
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**Lead batteries** have a maximum amount of current they will accept, typically [[electrical:12v:battery_capacity|C/3]] for AGM and C/5 for flooded. So if you have 100Ah of AGM the most it will want to take is something like ~33A. Installing 50A-100A of charging capacity won't help the battery.((it may help run loads, though)) | **Lead batteries** have a **maximum amount of current** they will accept, typically [[electrical:12v:battery_capacity|C/3]] for AGM and C/5 for flooded. So if you have 100Ah of AGM the most it will want to take is something like ~33A. Once the battery's limit is hit throwing more charging capacity at it can't charge it any faster.((it may help run loads, though)) |
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| ** Deep-cycled lead batteries have a lengthy [[electrical:12v:charging|Absorption]] stage** that cannot be sped up. Depending on use, Absorption typically requires several hours.There is a saying that "it takes 9 months to make a baby, but two women cannot make a baby in 4.5 months". Same with absorption - it takes what it takes and you cannot hurry it. |
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**Lithium batteries** can slurp up current wildly, but shouldn't for their own health. Lithium lasts longest in sub-C use (ie, less than 100A for a 100Ah Li bank). C/2 (50A) is a more common limit to keep from stressing them. In commercial examples the BMS will limit current to protect the cells. A small [[electrical:12v:b2b|DC-DC charger]] can help protect bare cells from their own greediness. | **Lithium batteries** can slurp up current wildly, but shouldn't for their own health. Lithium lasts longest in sub-C use (ie, less than 100A for a 100Ah Li bank). C/2 (50A) is a more common limit to keep from stressing them. In commercial examples the BMS will limit current to protect the cells. A small [[electrical:12v:b2b|DC-DC charger]] can help protect bare cells from their own greediness. |
opinion/frater_secessus/charging_faster.txt · Last modified: 2023/07/15 11:05 by frater_secessus