EGON DC-Hub Nano Installation Guide
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1.1 Read before installing.
DC power systems store and transfer significant energy. Incorrect installation can result in fire, damage to equipment, or serious personal injury. Take your time, read this manual fully, and do not proceed if you are unsure about any step.
2.2 General Safety Rules
• Always disconnect all batteries, chargers, and solar inputs before starting work.
• Never work on live circuits. Confirm circuits are de‑energized with a multimeter.
• Wear eye protection and remove rings, watches, and metal jewelry.
• Secure all cabling to prevent vibration damage in high-vibration conditions.
• Never exceed the rated current of connectors, cables, or fuses.
2.3 Fusing rules (critical)
All batteries must be externally fused as close to the battery as possible (within 30 cm).
• Fuses on the DC‑Hub Nano do NOT replace battery protection fuses.
• Fuse size must always protect the cable first, then the device.
• Never install a fuse with a higher rating than the cable can safely carry.
3.1 Brief
The EGON DC‑Hub Dual is designed for dual dc/dc charger systems that demand professional‑grade distribution, clear fault‑finding, and long‑term reliability.
3.2 The DC-Hub NANO provides:
• A centralised connection point for start battery, auxiliary battery, solar, and DC‑DC chargers.
• Three high‑current 80A fused input/output circuits.
• Five 25A fused accessory circuits that can be used as inputs or outputs.
• Dedicated DC‑DC charger and solar interfaces to remove wiring guesswork.
SPECIFICATIONS:
Electrical
• System voltage: 12V / 24V DC
• House battery input 150A max current
• Start battery input 80A max current
• High‑current I/O circuits: 3 × 80A max
• Solar input 60A max current
• DC-DC charger 80A max current
• 3x 80A input/output
• 5x 25A input/output
• Fuse types: F1–F5 blade fuses, FM1–FM5 midi fuses
Environmental
• Intended for automotive, mobile and limited marine applications.
• Install in a dry, protected location away from extreme heat, direct water (including splashes) and extreme dust exposure. Not suitable for installation in an engine bay.
Connection descriptions provided are based on the logic that current flows in or out of the DC Hub NANO. For example P9 is the DC-DC charger power ouput, but is described on the NANO as a charge input because the current will be flowing into the NANO. And, P7 is the DC-DC charger supply for power from solar and start battery / alternator and is described on the DC-Hub as an output because the current is flowing out of the DC-Hub and into the DC/DC charger.
P1. High-current input/output circuits 80A max – FM1 Midi
P2. Auxiliary (house) battery input: 150 amp max – externally at house battery 150 Amp Mega max
P3. General-purpose input/output circuits: 5 x 25 amp max - F1 – F5 standard blade fuse
P4. High-current input/output circuits 80 amp max - FM2 midi
P5. High-current input/output circuits 80 amp max - FM3 midi
P6. Start battery input 80 amp max – Externally fused at start battery 80 Amp midi max
P7. Outputs for start battery and solar panel to DC-DC input connections – No fuse
P8. Solar input regulated and unregulated see chapter 6.1 for details 60 amp max – FM4 Midi 60 amp max
P9. DC/DC charger input 80 amp max – FM5 Midi 80 amp max
NB. Do not use ferrules. The connectors are designed to clamp multi-core copper cable.
NB. 99.9% of the few returns we’ve had of this product are due to the connectors not being tightened sufficiently. If arcing occurs because of this, the temperature of the connection can be sufficient to damage the connector.
If tightened sufficiently and current not exceeded - this cannot happen.
Connectors cannot loosen by themselves. So this part is up to you!
SOLAR CONFIGURATIONS
Unregulated solar (DC‑DC charger with MPPT)
• For DC-DC charger with in-built MPPT
(e.g Redarc BC-DC)
• Solar connects directly to DC‑DC charger via P8
• DC‑DC solar input cable connects via P6
• Fuse FM4 must NOT be installed.
Regulated solar (external MPPT):
• Solar connect to an external MPPT regulator.
• MPPT output connects to P8.
• Fuse FM4 must be installed.
INSTALLATION STEPS - IN ORDER
Mount spacers in the bracket with screws inserted from the back. Do not over-tighten the screws. Just a firm hand will do.
Mount the bracket in a dry and easily accessible location. (Nano is not suited to under-bonnet installations.)
Insert the DC-Hub NANO into its bracket aligning connectors with matching T-slots, and secure onto the 8 spacers using supplied screws.
Place external battery fuses near each battery but do NOT insert fuses until installation is complete, or near completion (safety).
Route and secure all cabling for chargers, solar, batteries and loads.
Connect loads, chargers, batteries and solar inputs as planned to the Dc-Hub NANO.
Use cable ties to secure the cables to the T-bars on the mounting bracket. This is IMPORTANT as it reduces vibration wearing the cables loose.
Find the small switch on the board. Select 12V/24V or OFF. This controls the small white LED on the board that can be used to indicate when the NANO is energized.
Verify polarity and connector torques, and then energize the system by installing the battery fuse/s. Insert each load fuse one at a time and check system behavior at every step. As each fuse is inserted, a red LED that indicated an open but connectted circuit, should go out. If one stays on, check the fuse. (The red LED will only illuminate if there is an accessory connected).
Double check the tightness of ALL the connectors on the NANO. THIS IS A VITAL FINAL STEP. DO NOT SKIP IT!
TROUBLESHOOTING AND MAINTENANCE
If a circuit stops working:
• Check the relevant fuse and LED indicator.
• Inspect wiring and terminations.
• Confirm the load itself is functioning correctly.
Maintenance
Inspect the system periodically, especially after rough travel. Check terminal tightness, fuse condition, and cable routing. Early inspection prevents small issues becoming major failures.
WARRANTY AND SUPPORT
The EGON DC‑Hub NANO is covered by EGON’s standard 4-Year warranty against defects in materials and workmanship when installed correctly. Damage caused by incorrect installation or misuse is not covered.
For support, installation guidance, and updates, contact EGON through the EGON website. Refer to EGON’s video installation guides and wiring examples for further help.
CONNECTION EXAMPLES
A FINAL WORD
All batteries MUST be fused as close to the battery as possible. Do not rely on the fuses built into the DC-Hub NANO for this. Read that again. Now.
Cables that are too thin can cause heat build-up and reduce the efficiency of chargers and accessories.
DC-DC chargers should be placed as close as possible to the battery being charged, otherwise your system will not charge the battery efficiently.
MPPT chargers should be also be placed as close as possible to the battery being charged.
When inserting wires, the copper must be clean and enter into the connection cleanly.
Tighten the screw terminals properly (see torque recommendations). PLEASE PAY ATTENTION TO THIS and double check them before signing off.
Fuses protect the cables from burning in case of a short-circuit. So fuses must be capable of handling the current required to run the accessory, but NOT MORE THAN 25% of that. Accessory manufacturers recommend fuse sizes for a reason.
Cue: “We didn’t start the fire” by Billy Joel.