Charger
See the Schaudt LR 1218 connection points and wiring example. Open the diagram in Crimp to add your equipment and plan the cables between them.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3.3 ft one way
12 V system
Sized against ABYC E-11. The design current is the unit's rated output. The length is one way; voltage drop includes an equal-length return.
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
Direct-bank example: 20 A fuse, 2.5 mm² for <=4 m positive-plus-negative total; two 1 m conductors fit. Second bank needs its own fuse and shares total 18 A. EBL harness installations use exact connector drawing and 15/20 A fuse according to EBL marking instead. Cold module Voc <=25 V. Manufacturer installation manual
Wiring diagram
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Direct-bank example: 20 A fuse, 2.5 mm² for <=4 m positive-plus-negative total; two 1 m conductors fit. Second bank needs its own fuse and shares total 18 A. EBL harness installations use exact connector drawing and 15/20 A fuse according to EBL marking instead. Cold module Voc <=25 V. Manufacturer installation manual
Edit this wiring exampleInstallation notes
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. 22 September 2009; combined operating/installation manuals, manufacturer-authored retailer mirror), checked 2026-10-01. Manufacturer documentation →
LR 1218 is a 12 V PWM regulator for lead-acid or gel batteries of at least 55 Ah. It prioritizes the leisure bank and can maintain a starter bank within an 18 A total charging budget. It is not the later LRM MPPT model. The maximum module open-circuit voltage is only 25 V, with 19 A maximum module short-circuit current; many modern high-voltage roof panels exceed that envelope. See technical data, PDF p. 17.
The solar connector has its own positive and negative pair. Battery wiring includes leisure positive, starter positive and a common negative. Optional display connections report charging information rather than supplying loads. For a direct connection, route each positive to its correct bank and connect the common return before applying solar.
An Elektroblock installation instead uses the harness and connector positions for the exact EBL model. The manual shows different arrangements, including one three-way connector and a split adapter. Connector position, not wire colour alone, determines the destination. See EBL connection drawing, PDF p. 13.
The direct-battery diagram uses 20 A fuses in the positive leads. An EBL installation may require a 15 A or 20 A solar fuse according to its front-panel marking; do not replace it automatically with the direct-wiring value. Cable lengths are out and back combined: up to 4 m uses 2.5 mm², up to 8 m uses 4 mm², and up to 12 m uses 6 mm². See cable table, PDF p. 11 and direct-bank protection, PDF p. 12.
Connect the battery side before the solar module; disconnect solar first when removing the regulator. Under useful sun, confirm charging at the leisure bank, then verify starter maintenance as the priority bank fills. An unlit optional display or low solar current needs voltage and polarity checks before assuming a failed regulator. A correctly sized fuse does not make an over-voltage PV module compatible.
Build it out
Add LR 1218 to your diagram, then connect your batteries, chargers and loads. Crimp calculates cable sizes and checks the connections as you draw.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
SOLAR +
pv-pos
positive · input
SOLAR −
pv-neg
negative · input
HOUSE +
out-pos
positive · output
BATTERY COMMON −
out-neg
negative · bidi
STARTER +
starter-pos
positive · output
OPTIONAL DISPLAY
display
signal · bidi
A dash means a current rating is not specified here.
Method & provenance
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
ABYC E-11
Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. The run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.