ITW-BC20-24V

Intelligent Battery Charger

24V 20A AC

It's rated for 24V banks from 50Ah to 600Ah. At 20A the practical sweet spot is 100Ah to 200Ah, which recharges comfortably overnight. Larger banks will charge safely, but a 600Ah bank at 20A is a long charge rather than a quick top-up.

Roughly 5 to 6 hours. A 100Ah bank at 20A works out to about 5 hours of charging, plus a little more to account for the charger's 90% efficiency and the tapering absorption stage. Double the capacity and you roughly double the time.

Yes. The four-stage cycle finishes in maintenance, which holds the battery at the correct voltage without overcharging it, so the charger can stay connected indefinitely. Standby draw is under 2mA.

Five selectable profiles cover Standard Lead-Acid, GEL, AGM, Calcium and LiFePO4. Each runs its own absorption and float voltages, so select the profile that matches what's actually in your bank. Calcium in particular runs a notably higher absorption voltage than the others, and running the wrong profile can damage a battery.

No. The ITW-BC20-24V is a 24V charger and every profile outputs 24V charging voltages. Use a 12V charger for 12V batteries.

With no battery connected at all, the charger outputs a stable, regulated 24V at 20A directly from mains power. That lets you run 24V appliances while a bank is out for service, under repair, or not yet installed.

No. The charger has built-in temperature protection and works correctly either way. Fitting the included sensor lets it adjust charging voltage to the battery's actual temperature, which protects the cells and helps extend service life, so it's worth fitting where you can.

It switches off the cooling fan for near-silent running, which is useful overnight or in a confined space. Output drops to 5A while it's active, so charging takes roughly four times longer than in normal mode.

Somewhere dry and protected. The ITW-BC20-24V is rated IP20, which means it has no protection against water or fine dust, so it isn't suitable for external mounting or exposed locations. Allow clearance around the unit so the cooling fan can move air freely.

The charger operates from -20°C to 45°C. Note that the battery has its own limits, and many lithium batteries restrict or block charging below 0°C via their BMS, so check your battery's specification before charging in the cold.

It will begin charging batteries down to 2V. Below that, the charger won't detect a battery to charge.

The output is protected by two 15A blade fuses fitted externally to the unit. They can be replaced in seconds with standard blade fuses, so a blown fuse doesn't mean returning the charger.

A standard 240V outlet. The charger accepts 220-240V AC at 50-60Hz and draws a maximum of 4.5A, well within the capacity of a normal 10A household socket.