Victron energy Phoenix 12/30 (1+1) Bedienungsanleitung Seite 6

battery charger is in low-current mode during absorption or storage. Special
settings for a cold or warm environment are therefore not required.
4.7. Adaptive battery management
Lead acid batteries must be charged in three phases, namely [1] bulk charging,
[2] absorption charging and [3] float charging.
Several hours of absorption charging are required to fully charge the battery and
to prevent early defects due to sulphation¹.
However, the relatively high voltage during absorption shortens the battery's life
span as a result of corrosion at the positive plates.
Adaptive battery management limits corrosion by reducing the absorption period
if possible, i.e. when charging a battery that is already (almost) fully charged.
4.8. Storage mode: less corrosion of the positive plates
Even the lower float charge voltage that follows absorption charging will cause
corrosion. It is therefore essential to lower the charging voltage even more if the
battery remains connected to the charger for more than 48 hours.
4.9. Reconditioning
A lead acid battery that is insufficiently charged or is left in an uncharged
condition for several days or weeks will deteriorate due to sulphation
noticed in time, the sulphation can sometimes be partially reversed by charging
the battery to a higher voltage using a low current.
Notes:
Reconditioning must only be used now and then on flat-plate VRLA (gel and
AGM) batteries, as the gases formed during reconditioning dry out the
electrolyte.
VRLA batteries with cylindrical cells build up more internal pressure before the
gases are formed and therefore lose less water during reconditioning. Some
manufacturers of batteries with cylindrical cells therefore recommend
reconditioning in case of cyclical application.
Reconditioning can be applied to wet-cell batteries to 'balance' the cells and to
prevent acid stratification.
1 For more information about batteries, see
our book 'Energy Unlimited' (this can be downloaded from www.victronenergy.com) or
http://batteryuniversity.com/learn/article/sulfation_and_how_to_prevent_it
1 . If this is