SmartSolar 150/70
Victron MPPT 150/70 wiring diagram
SmartSolar 150/70: 70A output, 1000W at 12V / 4000W at 48V nominal PV power. PV limits are 150V absolute cold-weather Voc and 145V startup/operation. Verify Tr/MC4 and VE.Can suffix before wiring.
- Compatible systems
- 12 V / 24 V / 48 V
- Rated output
- 70 A
- PV open-circuit limit
- 150 V
Wiring diagram
How the MPPT 150/70 is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3 m one way
12 V system
- Wire
- 25 mm² · 4 AWG
- Example fuse
- 100 A
- Design current
- 70 A
- Voltage drop
- 2.5%
Sized against ABYC E-11. The design current is the unit's rated output. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
Supporting parts
- 6.1 m total of 25 mm² (4 AWG) marine cable
- Terminations for 25 mm² cable, matched to the equipment's screw terminals, leads or studs
- 100 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Reviewed against manufacturer family documentation (rev. Rev 12 — 06/2026), checked 2026-10-01. Exact variant details still require confirmation. Manufacturer documentation →
Which version is covered?
The SmartSolar 150/70 charges at up to 70 A, with nominal PV power of 1000 W at 12 V or 4000 W at 48 V. The catalog name does not specify Tr/MC4 or VE.Can. This walkthrough covers the VE.Direct 150/70 family in the linked manual; verify the full suffix before applying connector details. A VE.Can unit has a separate manual. The controller automatically detects 12/24/48 V; 36 V must be selected manually.
How are the power terminals used?
PV + / PV − represent the array input; BATT + / BATT − represent the battery circuit. Tr power terminals accept up to 35 mm² / AWG 2, tightened to 2.4 N·m. MC4 variants have two parallel PV connector pairs feeding one tracker, with 30 A maximum per connector pair. Never assume two connectors are separate MPPT channels.
The symbol omits the grounding screw, rotary profile selector, remote on/off connector, programmable relay, and VE.Direct port. There is no high-current LOAD output: house loads need their own protected battery circuits. Remote and relay connections are control circuits, not battery power terminals.
Which voltage and current limits apply?
The absolute PV limit is 150 V under the coldest conditions, while startup and operation are limited to 145 V. Calculate cold-weather string Voc, not only panel nameplate voltage. Startup also needs PV voltage 5 V above battery voltage, falling to 1 V once running. The aggregate array short-circuit current limit is 50 A. This is independent of the battery-output current rating.
What is the installation sequence?
The battery protection table gives a 80–100 A fuse for this model. Locate battery protection near the source and select cable for the route and voltage drop. With PV isolated, connect the battery first, wait 10 seconds, verify system voltage, then connect PV and control wiring. Check polarity before energizing either source.
Mount vertically on a nonflammable surface, terminals downward, with 100 mm clearance above and below, within 3 m of the battery but never above it. IP22 connection protection requires a dry guarded location; full output is specified up to 40°C.
Which charging settings need review?
Choose a battery-approved preset and current limit in VictronConnect. Confirm absorption, float, equalization, and lithium temperature restrictions. The battery's BMS must be able to stop charging where required. After startup, check battery voltage at both battery and controller and confirm that current, voltage, and temperature readings are plausible.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with SmartSolar 150/70 connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
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Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
SmartSolar 150/70: 70A output, 1000W at 12V / 4000W at 48V nominal PV power. PV limits are 150V absolute cold-weather Voc and 145V startup/operation. Verify Tr/MC4 and VE.Can suffix before wiring.
- Compatible systems
- 12 V / 24 V / 48 V
- Rated output
- 70 A
- Planning charge current
- 70 A
- PV open-circuit limit
- 150 V
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
PV +
positive · input
PV −
negative · input
BATT +
positive · output
BATT −
negative · output
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with MPPT 150/70.
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