FIAMM 12FGL33 AGM 12 V 33 Ah battery
FIAMM 12FGL33 AGM 12 V 33 Ah battery: 33 Ah at 12 V, equal to 396 Wh nominal, in a sealed VRLA AGM design.
For solar, UPS and auxiliaries: size discharge, charger and protection.
FIAMM 12FGL33 AGM 12 V 33 Ah battery is a sealed VRLA AGM battery for solar, UPS, security and auxiliary power, designed to operate without electrolyte top-ups.
Ah alone does not define runtime. This page connects capacity, nominal energy, depth of discharge and efficiency so selection starts from real use.
Why choose this FIAMM AGM battery
Electrolyte is absorbed in glass-fibre separators and the range declares 99% internal gas recombination. Self-discharge below 2% per month at 25 °C supports storage when charge is maintained correctly.
- Capacity: 33 Ah
- Nominal energy: 396 Wh
- Technology: VRLA AGM
Technical specifications 12FGL33
| Part number | 12FGL33 |
| Voltage | 12 V |
| Capacity | 33 Ah |
| Nominal energy | 396 Wh |
| Technology | VRLA AGM |
| Dimensions | 19.6 × 13 × 15.9 cm |
| Weight | 10.6 kg |
Runtime: a practical example
Nominal energy is 12 V × Ah. For a conservative example we use 50% depth of discharge and 85% inverter efficiency, giving estimated AC energy equal to 42.5% of nominal energy.
With a constant 100 W load, 168 Wh estimated gives about 1.7 hours. This is a planning reference, not a guarantee: temperature, age, surges and discharge current change the result.
Charge with a compatible AGM profile. Fuse the positive connection, prevent short circuits and install securely away from heat, following the manual’s ventilation guidance.
Frequently asked questions
How much energy can I use without fully discharging it?
At 50% depth of discharge and 85% efficiency, the conservative AC estimate is about 42.5% of nominal Wh.
Is it suitable for a solar panel?
Yes, when controller voltage and charge current match the AGM profile and battery-bank configuration.
Can several batteries be connected?
Only identical units of the same model, capacity, age and condition, with symmetric cables and protection as instructed.
Is a specific charger required?
Use a charger with an AGM curve and compatible voltages; incorrect charging reduces life and capacity.
Is it truly maintenance-free?
No topping up is required, but terminals, temperature, state of charge and any deformation or damage must be checked.
