Uploaded January 2026 | Updated September 2026, 1 week ago
š My Best-Selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified
Link to the diagram and components used: cleversolarpower.com/campervan-3000w-inverter-24v-battery
Components used:
24V 3000VA multiplus 2: amzn.to/49mrFE4
24V 100Ah LiFePO4 Battery: amzn.to/4pu3jhO
Victron orion TR-Smart 12/24 15A: amzn.to/3L5zkyF
MPPT Charge Controller: amzn.to/3LyYO7C
200W Solar Panels: amzn.to/3NlFMlD
Orion Tr 24/12 20A: amzn.to/49a1r90
MCCB: amzn.to/49dPAa1
MEGA Fuse Busbar: amzn.to/4aJGHWN
Negative busbar: amzn.to/45ux0Ig
MEGA Fuses amzn.to/4quMWD3
MIDI Fuses: amzn.to/49eY14Y
MRBF Terminal: amzn.to/4jsgpdU
MRBF Fuses: amzn.to/4jvjj1m
12V DC Fusebox: amzn.to/4smMs2W
Welding cable: amzn.to/4aPy50W
THHN wire: amzn.to/4aUQFot
grounding wire: amzn.to/49teqSb
Shunt BMV 712: amzn.to/4jt1Jet
PV Disconnect switch: amzn.to/4aPkTco
alternatively:
24V 3000W Giandel inverter amzn.to/4jyWwlw
24V 30A Battery charger amzn.to/4jvHX29
In this video I walk through a complete 24-volt RV electrical system built around a 3000W (3000VA) inverter/charger. The goal is to show a practical layout that can charge from three sourcesāsolar on the roof, the alternator while driving through a DC-DC charger, and shore power when you plug in at a campground. I explain how each charging source connects into the system and why 24V is a good middle ground for an RV compared to 12V and 48V.
For the solar side, I use three 200W panels and show how to check panel voltage against the charge controllerās maximum input, including a cold-weather safety factor so you donāt accidentally exceed the MPPT rating. I also show how to estimate realistic charging current into a 24V battery bank and how that influences charge controller sizing. From there, I cover the purpose of a PV disconnect and when you doāor donātāneed string fuses.
For alternator charging, I explain why a DC-DC charger is used instead of connecting lithium batteries directly to the alternator, and how a 12V starting system can charge a 24V house bank safely. On the shore power side, I explain what an inverter/charger does, roughly how much charging power a 70A charger provides at 24V, and how the same unit can power AC loads from shore power when youāre plugged in. I also mention how generator charging fits in through a transfer switch.
In the battery section, I show a simple 24V battery bank using two 24V 100Ah batteries in parallel for about 5kWh of storage, and I explain the wiring approach using MRBF fuses at each battery, a main DC breaker as the primary disconnect, and a busbar to keep connections safe and organized. I also cover why some inverter specs are listed in VA instead of watts, what that means in practice, and what a 3000W-class inverter can realistically run in an RV.
Because most RV accessories are still 12V, I include a 24V-to-12V converter feeding a dedicated 12V fuse box for lights, pumps, fans, and other 12V loads. I then go through the wire and fuse sizing step by step for the major circuits: PV wiring, MPPT output wiring, inverter cables and main fuse, individual battery cables and fuses, DC-DC charger input/output wiring, and the 24V-to-12V converter wiring. The focus is on how to calculate currents, apply safety margins, and pick standard fuse sizes and wire gauges.
Finally, I show how to place a GFCI breaker on the inverterās output, how to size it for 120V versus 230V setups, and how grounding is handled in a mobile system. I explain the difference between AC grounding and DC grounding, where grounds should land, and why adding extra neutral-to-ground bonds in the wrong place can cause nuisance tripping.
š My Best-Selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified
Link to the diagram and components used: cleversolarpower.com/campervan-3000w-inverter-24v-battery
Components used:
24V 3000VA multiplus 2: amzn.to/49mrFE4
24V 100Ah LiFePO4 Battery: amzn.to/4pu3jhO
Victron orion TR-Smart 12/24 15A: amzn.to/3L5zkyF
MPPT Charge Controller: amzn.to/3LyYO7C
200W Solar Panels: amzn.to/3NlFMlD
Orion Tr 24/12 20A: amzn.to/49a1r90
MCCB: amzn.to/49dPAa1
MEGA Fuse Busbar: amzn.to/4aJGHWN
Negative busbar: amzn.to/45ux0Ig
MEGA Fuses amzn.to/4quMWD3
MIDI Fuses: amzn.to/49eY14Y
MRBF Terminal: amzn.to/4jsgpdU
MRBF Fuses: amzn.to/4jvjj1m
12V DC Fusebox: amzn.to/4smMs2W
Welding cable: amzn.to/4aPy50W
THHN wire: amzn.to/4aUQFot
grounding wire: amzn.to/49teqSb
Shunt BMV 712: amzn.to/4jt1Jet
PV Disconnect switch: amzn.to/4aPkTco
alternatively:
24V 3000W Giandel inverter amzn.to/4jyWwlw
24V 30A Battery charger amzn.to/4jvHX29
In this video I walk through a complete 24-volt RV electrical system built around a 3000W (3000VA) inverter/charger. The goal is to show a practical layout that can charge from three sourcesāsolar on the roof, the alternator while driving through a DC-DC charger, and shore power when you plug in at a campground. I explain how each charging source connects into the system and why 24V is a good middle ground for an RV compared to 12V and 48V.
For the solar side, I use three 200W panels and show how to check panel voltage against the charge controllerās maximum input, including a cold-weather safety factor so you donāt accidentally exceed the MPPT rating. I also show how to estimate realistic charging current into a 24V battery bank and how that influences charge controller sizing. From there, I cover the purpose of a PV disconnect and when you doāor donātāneed string fuses.
For alternator charging, I explain why a DC-DC charger is used instead of connecting lithium batteries directly to the alternator, and how a 12V starting system can charge a 24V house bank safely. On the shore power side, I explain what an inverter/charger does, roughly how much charging power a 70A charger provides at 24V, and how the same unit can power AC loads from shore power when youāre plugged in. I also mention how generator charging fits in through a transfer switch.
In the battery section, I show a simple 24V battery bank using two 24V 100Ah batteries in parallel for about 5kWh of storage, and I explain the wiring approach using MRBF fuses at each battery, a main DC breaker as the primary disconnect, and a busbar to keep connections safe and organized. I also cover why some inverter specs are listed in VA instead of watts, what that means in practice, and what a 3000W-class inverter can realistically run in an RV.
Because most RV accessories are still 12V, I include a 24V-to-12V converter feeding a dedicated 12V fuse box for lights, pumps, fans, and other 12V loads. I then go through the wire and fuse sizing step by step for the major circuits: PV wiring, MPPT output wiring, inverter cables and main fuse, individual battery cables and fuses, DC-DC charger input/output wiring, and the 24V-to-12V converter wiring. The focus is on how to calculate currents, apply safety margins, and pick standard fuse sizes and wire gauges.
Finally, I show how to place a GFCI breaker on the inverterās output, how to size it for 120V versus 230V setups, and how grounding is handled in a mobile system. I explain the difference between AC grounding and DC grounding, where grounds should land, and why adding extra neutral-to-ground bonds in the wrong place can cause nuisance tripping.
