System layout examples

SOLAR

ALTERNATOR

SHORE

MPPT

DC-DC

CHARGER

POS BUS

BATTERY

DC LOADS

INVERTER

AC PANEL

fuse + disconnect

AC source switching / protection

Weekend 12 V

100-200 Ah LFP or appropriate AGM; 200-400 W solar; 20-30 A DC-DC; small shore charger; DC fuse block; 600-1,500 W inverter only if actual AC loads justify it.

Full-time 12 V

300-600 Ah LFP; 400-800 W solar; 30-60 A DC-DC; 2,000-3,000 W pure sine inverter/charger; central busbars and shunt; load management.

High-power 24 V

5-15 kWh LFP at 24 V; 800-1,600 W solar; appropriately engineered alternator charging; 3-5 kVA inverter/charger; DC-DC converters for 12 V loads; high-interrupt battery protection.

Integrated vs separate

An inverter-charger simplifies transfer, charging and monitoring but creates a larger single point of failure. Separate inverter and charger are easier to replace independently and may offer redundancy. Both can be correct.

Translation rule

Draw sources on the left, storage/distribution in the middle, loads on the right. Put every fuse, disconnect, shunt, conductor size, voltage and grounding/bonding point on the diagram.

Rule of thumb

If you cannot state the expected current, full conductor length, protection rating and manufacturer limit for a circuit, the circuit is not ready to build.