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electronics · automotive · power management

12V/24V Dual Battery Automatic Power Selector

Tipo Schema elettricoStandard IEEE Std 315 / ANSI Y32.2Motore schematex-circuitAggiornato 22/09/2026
12V/24V Dual Battery Automatic Power Selector
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Lo scenario

A camper van uses a starter battery and a house battery, with an alternator charging the starter battery and a solar panel charging the house battery. An automatic voltage-sensitive relay connects the batteries when the engine runs and isolates them when stopped.

Cosa contiene questo disegno

Leggi le decisioni che ne stanno alla base.

01

Voltage-sensitive relay (VSR) energizes from the alternator output to connect the house battery only while charging.

02

A Schottky blocking diode prevents backfeed from the house battery to the solar panel at night.

03

Separate fuses protect alternator, solar, and house load circuits.

Use as a reference when designing or troubleshooting dual-battery systems in camper vans, boats, or off-grid vehicles that combine alternator and solar charging.

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