SmartSolar 100/50
MPPT solar charge controller. 50A output, max 700W @ 12V / 1400W @ 24V, 100V PV. Keep the array's cold-weather Voc under 100V.
The reference run on this page is 3 m one way, sized against ABYC E-11. Your own run will differ, and the canvas sizes that one.
Wiring diagram
The drawing shows where the feed, the return and the fuse land on this part. The starter uses the same reference circuit and sizing assumptions. Read the installation notes for manufacturer requirements before adapting the runs.
Build it out
Open the canvas with SmartSolar 100/50 already placed, then add your batteries, charging, distribution and loads around it.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
The catalog facts for this part, which terminal takes what, and the hardware you'll want around it. Check the nameplate on your own unit before you order.
3 m reference run
12 V system
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The design current is the unit's rated output. The length is one way; voltage drop includes an equal-length return. The shared starter uses 3.048 m (10 ft) runs unless a shorter run is stated. These are example assumptions for you to adapt to your own installation.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
PV +
pv-pos
positive · input
PV −
pv-neg
negative · input
BATT +
batt-pos
positive · output
BATT −
batt-neg
negative · output
Field notes
What we've read and heard about installing this exact part. These are notes, kept apart from the numbers Crimp works out.
The catalog item is the Victron SmartSolar MPPT 100/50, with Bluetooth and VE.Direct. Its SmartSolar manual covers the 100/30 and 100/50; use the 100/50 column. The similar BlueSolar name does not identify this catalog item.
PV + and PV − connect to the array. BATT + and BATT − connect to the house bank, with protection on the battery-positive run. For automatic voltage detection, the installation sequence is battery first, wait 10 seconds, verify the detected voltage, then connect PV. Check polarity and the battery charge profile.
The reference drawing highlights the battery-side charge circuit. The editable starter adds a 400 W reference array and a 12 V, 200 Ah house bank. Its array is a placeholder at 20 V operating voltage and 24 V open-circuit, not a selected panel product. Replace it with your own array before relying on PV sizing. The controller's rated output sizes the battery circuit; the example does not predict that this array will produce the full rated charge current.
The manual's battery table specifies 55 A minimum and 70 A maximum for the 100/50. The fuse shown above is Crimp's calculated example within that range. It protects the battery cable; it is not a PV-string fuse recommendation.
The starter and reference use the same battery-side length and current basis. Each length is one way, and voltage drop includes the return. Mount within the manual's 3 m battery distance; this example uses a 3 m battery cable path. Longer or warmer routes, bundling and different protection can change the required conductor. The manual lists 16 mm² / AWG6 power terminals: verify that your selected cable and termination fit.
The 100/50 specifications distinguish 100 V maximum PV open-circuit voltage, 60 A maximum PV short-circuit current and 50 A rated battery charge output. These are different quantities. Check cold-weather array Voc and panel temperature coefficients; use the actual string configuration and panel fuse requirements for PV protection.
For RV or campervan solar, house loads belong on protected distribution circuits. This starter covers DC charging. Add a Blue Sea 5026 fuse block for load branches, and use the conversion guide when changing battery chemistry. The methodology explains the sizing engine's limits.
Open the complete campervan and RV solar wiring examples or the small boat solar house system to see the controller alongside distribution and loads.
Verified against the manufacturer's documentation (rev. 12 — 06/2026), checked 2026-09-11. Manufacturer documentation →
Method & provenance
The manufacturer publishes some of these numbers and Crimp works out the rest. It's worth knowing which is which.
From the maker
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
ABYC E-11
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
It lands on the canvas already placed. Add what it connects to, and every run gets its wire and fuse as you draw.