RV & mobile

BS Series smart battery charger

Mains battery chargers with three isolated outputs, for two house batteries and the starter battery. 12V and 24V.

Part of the LIBERGRID system

BS Series chargers charge your batteries from shore power or a generator. They suit vehicles that run without an inverter charger, or that need a dedicated charger alongside one.

Models

BS1225-3	12V, 25A
BS1240-3	12V, 40A
BS2420-3	24V, 20A

Features

Three isolated outputs charge two house batteries and keep the starter battery topped up.
TBB Premium II multi-stage charging for lead-acid, and compatible with lithium.
Automatic temperature compensation and built-in battery protection.
Quiet operation, with an optional remote switch.

Where to buy Datasheets and manuals

Compare models

Model	Battery	Charge current	Outputs
BS1225-3	12V	25A	2 house + starter
BS1240-3	12V	40A	2 house + starter
BS2420-3	24V	20A	2 house + starter

Specifications

Figures for the 12V models (24V values are double)

Charging
AC input	165–265V, 50/60Hz, IEC socket
Charging stages	Soft start, bulk, absorption, float, recycle
Absorption voltage	AGM 14.4V, GEL 14.1V, lithium 14.4V, flooded 14.7V
Float voltage	13.5V (flooded 13.7V)
Power supply mode	13.5V ±0.27V
Efficiency	88%, with active PFC
Ripple	200mV peak-to-peak or less

General
Cooling	Fan
Operating temperature	−20°C to 60°C (reduced current above 40°C)
Housing	Aluminium and plastic
Dimensions	249 × 165 × 74mm
Weight	1.6kg
Protection rating	IP22