Which solar charge controller: PWM or MPPT?

Which solar charge controller: PWM or MPPT?

What follows is a summary of our white paper with the same title.

For the full white paper, see: Which solar charge controller: PWM or MPPT? in the White papers section of our site.

1. What they do

The PWM controller is in essence a switch that connects a solar array to a battery. The result is that the voltage of the array will be pulled down to near that of the battery.

The MPPT controller is more sophisticated (and more expensive): it will adjust its input voltage to harvest the maximum power from the solar array and then transform this power to supply the varying voltage requirement, of the battery plus load. Thus, it essentially decouples the array and battery voltages so that there can be, for example, a 12 volt battery on one side of the MPPT charge controller and a large number of cells wired in series to produce 36 volts on the other.

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Victron_P&A_App

VictronEnergy stocklist app: Updated to the new P&A App

The price & availability (P&A) of products has until now, been available in the VictronEnergy app seen in the mobile phone screenshot above. This app included a full stocklist with pricing, plus a handy cable sizing and charger/inverter temperature derating tool.

This has now been superseded and updated with the new Victron P&A app. This separates out the price, availability and stock holding of products from the handy tools mentioned, which will come in a separate app in due course. For now though you can continue to use the tools in the old app, as the new P&A app will sit alongside the old VictronEnergy app, quite happily, as you can see.Continue reading