Originally Posted by onestepcsy37
What Utahsailor says. Don't obsess over 100% charges, they aren't necessary......
Utahasailor says fully recharge overnight once a week. This is good advice if you can do it, if not sulfation (Lead Sulfate Crystals) begins to build up on the plates. So you should
worry about not getting to 100% charges otherwise the batteries will die prematurely. This is one of Maine
Sail's main messages. PSOC or Partial State of Charge will prematurely kill batteries. An overnight shorepower charge with a suitable sized charger
is the best way to guarantee a 100% charge. A heavily depleted large bank may take 24 hrs or more.
Lead Sulfate crystals are produced every time a battery
is even partially discharged. It's part of a chemical formula that, among other things, produces water
which reduces the SG of the electrolyte and results tin the Lead and the Sulfuric Acid combining to form Lead Sulfate. Charging
reverses the process, but if not fully re-charged the Lead Sulfate Crystals that build up on the plates over a week or more start to harden. The longer they are left the harder the crystals become and a high Equalization
voltage will be needed for several hours to remove them. When fully charged regularly all the Lead Sulfate Crystals are converted back to Lead and Sulfuric Acid with its maximum SG value.