Introduction; Purpose; Function Of The Lrm 1218 Solar Charge Regulator - Schaudt LRM 1218 Operating Instructions Manual

2.1
Electroblocks
Batteries
Solar current display
LT 320 (accessory)
2.2
Function ofsolar cell
Maximum Power Point
MPP
Functional principle
of the LRM 1218
822.0213 BA / EN
Operating Instructions for Solar Charge Regulator LRM 1218
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Introduction

This instruction manual contains important information on safe operation of
the device. Make sure you read and follow the safety instructions provided.
The instruction manual should always be kept in the vehicle. All safety infor-
mation must be passed on to other users.

Purpose

The MPP LRM 1218 solar charge regulator is for charging the batteries of
the motorhome by means of the solar modules connected.
The solar charge regulator limits and controls the charging voltage of the
batteries. The LRM 1218 solar charge regulator can be connected to:
a Schaudt electroblock with an STDBUS connection and a separate
F
connection for solar current
a Schaudt electroblock with a separate connection for solar current
F
a Schaudt electroblock with a retrofit adapter for charging the starter
F
battery
directly to the batteries
F
To use the solar charge regulator with an electroblock, refer to the in-
Y
struction manual for the electroblock.
For vehicles with SDTBUS, or when a digital control panel with solar current
display is available, the charging current is read by the shunt fitted in the
solar charge regulator, and displayed on the panel as solar current.
When used on systems without an integrated solar current display, the
separately available LT 320 control panel can be used as an accessory. It
enables the display of the solar charging current for the leisure and starter
batteries.

Function of the LRM 1218 solar charge regulator

The power output of a solar cell is dependent on its load and temperature,
as well as other factors such as lighting intensity. A certain off-load voltage is
applied to a non-loaded solar cell under light irradiation.
The maximum power can be taken in the Maximum Power Point (MPP) of a
solar module. Because the solar module only delivers its highest yield in this
point, a regulator connected must be able to find this point, and keep it conti-
nually even under changing conditions.
The LRM1218 solar regulator is used to charge 6-cell, 12V lead batteries
(lead-acid, lead-gel and AGM batteries).
The solar regulator is a clocked converter featuring a very high efficiency
level. A microcontroller controls it such that the solar modules connected
always operate within the point of maximum power (the MPP) independently
of sun exposure, battery voltage and module temperature, whilst the battery
is in the main charging phase.
The charge voltages provided are aligned perfectly to the leisure battery by
means of a temperature sensor and the ability to set three battery types.
Date: 22.07.2015
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