Victron BlueSolar MPPT 100/20 (up to 48 V)

In a nutshell

Small MPPT solar charge controller, 100 V and 20 A, for 12, 24 or 48 V batteries. It uses up to 1,160 W of panels at 48 V.

Ideal for small systems with few panels: a shed, a vehicle, a boat or some lights with a battery.

How to read the two numbers of an MPPT charge controller

• The input volts are the maximum that the panels connected in series can add up to. On cool mornings the voltage rises a little, so you must leave some margin.
• The amps are the maximum current the controller delivers to the battery. Multiplied by the battery voltage, this current gives the panel power it can use.
• If more panels are connected than it can handle, the controller does not use the excess (excess power does not damage it). But you must never exceed the input voltage: that does break it.

That is why serious systems run at 48 V: the same device delivers four times as much as at 12 V.

About this model (100 V · 20 A)

Keep in mind the Voc (open-circuit voltage) of your panels: for example, if a panel has 50.6 V, two in series already add up to 101 V, more than this equipment accepts.

• Note: it accepts a maximum of 20 A of short-circuit current from the panels.
• Usable power: 290 W at 12 V · 580 W at 24 V · 1,160 W at 48 V.
• DC load output (20 A at 12 and 24 V, 1 A at 48 V) that switches off automatically when the battery is low.
• Panels and battery with screw terminals. Efficiency 98 %.
• It does not include built-in Bluetooth: it is configured and monitored through its VE.Direct port, with the VictronConnect app via a VE.Direct Bluetooth Smart dongle or a VE.Direct to USB cable.