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Component folio · Charger · Redarc

Redarc Manager Alpha75

Model BMS12075

75 A 12 V battery management system: combined DC-DC (alternator), MPPT solar and AC shore-power charging with Green Power Priority. Compatible with lithium, AGM, gel, calcium and lead-acid.

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Redarc Manager Alpha75 · 8 terminals
01 — Reference run

A sizing result with its assumptions attached.

Conductor4 AWG25 mm²
Fuse100 Apositive run
Voltage drop2.6%9.8 ft one way
Design current75 A12 V system

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 design current is the unit's rated output. The Crimp engine applies its ordinary continuous-load headroom, voltage-drop budget, terminal clamp, and standard fuse ladder. The 9.8 ft one-way run is a stated reference, not a universal installation prescription.

02 — Catalog specification

The part the engine actually sees.

Rated power
1,200 W
Rated output
75 A
Typical charge current
70 A
PV open-circuit limit
32 V

Terminal map

TerminalPolarityDirectionRating
ALT +positiveinput100 A
PV +positiveinput40 A
PV −negativeinput40 A
AC Lneutralinput16 A
AC Nneutralinput16 A
AC ⏚groundbidi16 A
BATT +positiveoutput100 A
BATT −negativeoutput100 A
03 — Supporting parts

What belongs around it.

  • 19.7 ft total of 4 AWG (25 mm²) marine cable
  • Four 4 AWG cable lugs matched to the equipment studs
  • 100 A fuse and holder on the positive run
  • Heat-shrink, strain relief, and terminal boots sized to the cable

See what it changes in your system

With JavaScript enabled, describe your existing boat, van, or off-grid system here. The model supplies topology; Crimp's engine computes the attachment, resized runs, checks, and supporting basket.

04 — Method & provenance

What is known, assumed, and computed.

Catalog profile

The manufacturer, model, ratings and terminal map are maintained as planning data in Crimp's component catalog. Confirm the current manufacturer manual, exact revision and installed nameplate before ordering or wiring.

Engine reference

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 published conductor, fuse and voltage-drop result uses the visible reference length and current basis; it is not a universal installation prescription.

Read the complete methodology →
05 — Related components

Comparable parts in the same system role.

Browse all charger profiles →