Victron BlueSolar MPPT 100/15

In a nutshell

Small MPPT solar charge controller, 100 V and 15 A, for 12 or 24 V batteries. It uses up to 440 W of panels at 24 V.

Ideal for small systems with few panels: a shed, a vehicle, a boat or some lights with a battery. It has a DC load output (up to 15 A) that switches off automatically when the battery is low.

How to read the two numbers of an MPPT

• Input voltage: this is the maximum combined voltage of the panels connected in series. Add the Voc (open-circuit voltage) of the panels that will be in series and check that it does not exceed 100 V. On cool mornings the voltage rises a little, so you must leave some margin.
• Amps: this is the maximum current the controller delivers to the battery. The panel power it uses comes from multiplying this current by the battery voltage. That is why the same controller delivers twice as much at 24 V as at 12 V.
• If more panels are connected than it can handle, the controller simply does not use the excess (excess power does not damage it). But you must NEVER exceed the input voltage: that does break it.
• This model works only with 12 or 24 V batteries; for a 48 V system you need a controller that accepts 48 V.

About this model (100 V · 15 A)

• For small panels only, whose short-circuit current does not exceed 15 A. For example, a panel with 16.1 A short-circuit current is not suitable for this controller.
• Usable power: 220 W at 12 V · 440 W at 24 V.
• Panels and battery are connected 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.