TOYOTA FORUM BULGARIA
https://toyotabg.eu/
На оловните акумулатори стандартно токът на заряд бе ДО 10% от капацитета му... Т.е. за 40Ач токът трябва да е ДО 4А...
AGM needs tighter voltage limits and a charger/profile designed for AGM, while flooded “classic” batteries are more forgiving.
Key charging differences
Voltage setpoints
Flooded lead‑acid (typical 12 V starter): bulk/absorption around 14.2–14.4 V, float around 13.1–13.3 V.
AGM: bulk/absorption typically 14.4–14.8 V, float 13.2–13.8 V, with strict upper limit below ~15 V to avoid dry‑out and gas buildup.
Tolerance to overcharge
Flooded: can tolerate occasional higher‑voltage “equalization” (15–15.5 V) because you can add water if it vents; this is used to mix electrolyte and reduce stratification.
AGM: must not be equalized like flooded; sealed design means any lost water is permanent, so they require precise regulation and no long high‑voltage overcharge.
Charging current (C‑rate)
Flooded: usually charged at ~10–15% of Ah capacity for long life, but can accept more in automotive alternator use.
AGM: can accept higher current (often 10–25% of Ah), but manufacturers specify a max bulk current; still, voltage must be well controlled.
Charger/algorithm selection
Flooded: generic lead‑acid profile is usually fine; many simple chargers and alternators are designed around flooded chemistry.
AGM: best practice is a smart charger with AGM mode (correct absorption & float voltages, temperature compensation, soft finish). Using a “flooded”‑only charger risks chronic under‑ or over‑charge.
Temperature compensation
Both types benefit from temp‑compensated voltage, but with AGM it’s more critical because you don’t want off‑gassing in a sealed case.
Избягвам повече от 4A освен ако не бързам много и знам, че няма да го зареждам до горе 
