This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
electrical:12v:charging [2019/01/03 16:46] frater_secessus [equalization stage] |
electrical:12v:charging [2019/04/11 19:50] frater_secessus [charge-and-stop] |
||
---|---|---|---|
Line 45: | Line 45: | ||
- | ==== equalization | + | |
+ | ===== charge-and-hold ===== | ||
+ | Charging can be achieved with a simpler methods like charge-and-hold where the charger has a single setpoint which it holds; | ||
+ | |||
+ | |||
+ | Examples include: | ||
+ | |||
+ | * [[electrical: | ||
+ | * power supplies, which will usually have a potentiometer (//pot//) to adjust voltage by +/- 10%. Shore power assumed. | ||
+ | * [[electrical: | ||
+ | |||
+ | |||
+ | ===== charge-and-stop ===== | ||
+ | |||
+ | [[electrical: | ||
+ | - charge to [[electrical: | ||
+ | - fall in voltage to a High Voltage Reconnect (Vhvr) | ||
+ | - repeat | ||
+ | |||
+ | These setpoints may or may not be user-configurable. | ||
+ | |||
+ | Charge-and-stop may be useful when charging battery chemistries like lithium, or when [[electrical: | ||
+ | |||
+ | ===== charging AGM batteries ===== | ||
+ | |||
+ | AGM batteries are kept healthy by: | ||
+ | |||
+ | - vigorous Bulk charging, sometimes greater than solar-only charging can provide.((http:// | ||
+ | - long Absorption stages | ||
+ | - but lower Absorption voltage (to prevent outgassing) | ||
+ | - absolutely no Equalizing (which would create heavy outgassing) | ||
+ | |||
+ | Many charge controllers have AGM or GEL modes that handle these setpoints and durations. | ||
+ | |||
+ | ===== charging other chemistries ===== | ||
+ | |||
+ | See [[electrical: | ||
+ | |||
+ | ===== equalization | ||
Sometimes called the fourth stage, " | Sometimes called the fourth stage, " | ||
Line 54: | Line 92: | ||
- | Water levels | + | If water levels |
- | ==== temperature compensation ==== | + | ===== temperature compensation |
Accurate charging requires the charger know the temperature of the batteries being charged. In hot temps a full charge will require somewhat lower voltage. Cold temps will require higher voltage((https:// | Accurate charging requires the charger know the temperature of the batteries being charged. In hot temps a full charge will require somewhat lower voltage. Cold temps will require higher voltage((https:// | ||
Line 69: | Line 107: | ||
- ambient temperature as measured by the charger. | - ambient temperature as measured by the charger. | ||
- in the absence of actual measurements the charger will likely use the 77F laboratory standard. | - in the absence of actual measurements the charger will likely use the 77F laboratory standard. | ||
- | ==== watering batteries ==== | + | |
+ | ===== watering batteries | ||
{{ http:// | {{ http:// | ||
Flooded lead-acid batteries outgas during Absorption, causing a slow loss of water. | Flooded lead-acid batteries outgas during Absorption, causing a slow loss of water. | ||
Line 86: | Line 125: | ||
- | ==== charging while using the 12v system ==== | + | ===== charging while using the 12v system |
Smart chargers handle charging under load gracefully. As long as there is enough solar power coming in to hold the absorption or float voltage steady those charging stages will not be disturbed. If there is not enough power to hold the prescribed voltage the charger may restart Bulk charging. This behavior may be configurable by the user. | Smart chargers handle charging under load gracefully. As long as there is enough solar power coming in to hold the absorption or float voltage steady those charging stages will not be disturbed. If there is not enough power to hold the prescribed voltage the charger may restart Bulk charging. This behavior may be configurable by the user. | ||
Line 98: | Line 137: | ||
**Manual chargers** will not be affected by load as they are controlled by the user. | **Manual chargers** will not be affected by load as they are controlled by the user. | ||
- | |||
- | ===== charge-and-hold ===== | ||
- | Charging can be achieved with a simpler methods like charge-and-hold where the charger has a single setpoint which it holds; | ||
- | |||
- | |||
- | Examples include: | ||
- | |||
- | * [[electrical: | ||
- | * power supplies, which will usually have a potentiometer (//pot//) to adjust voltage by +/- 10%. Shore power assumed. | ||
- | * [[electrical: | ||
- | |||
- | |||
- | ===== charge-and-stop ===== | ||
- | |||
- | [[electrical: | ||
- | - charge to [[electrical: | ||
- | - fall in voltage to a High Voltage Reconnect (Vhvr) | ||
- | - repeat | ||
- | |||
- | These setpoints may or may not be user-configurable. | ||
- | |||
- | Charge-and-stop may be useful when charging battery chemistries like lithium, or when [[electrical: | ||
- | ====== charging AGM batteries ====== | ||
- | |||
- | AGM batteries are kept healthy by: | ||
- | |||
- | - vigorous Bulk charging, sometimes greater than solar-only charging can provide.((http:// | ||
- | - long Absorption stages | ||
- | - but lower Absorption voltage (to prevent outgassing) | ||
- | - absolutely no Equalizing (which would create heavy outgassing) | ||
- | |||
- | Many charge controllers have AGM or GEL modes that handle these setpoints and durations. | ||
- | ====== charging other chemistries ====== | ||
- | |||
- | See [[electrical: | ||
- | |||