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Hi All. I have a 100/20 48v mppt controller connected to two 100w panels in series. The battery is a 48v lithium. The voltage from the panels is +/- 40v. The problem is that no current is generated at all. If I measure right from the panels I got 45v and 4 amp, yet zero amps are being shown or received on the victron app. All connections have been checked and re-checked. What am I missing please?
Hi in order to have a working system, your PV voltage should be at least 5V higher then battery voltage to start the mppt, 45V is to low, should be at least 53V
Please post a screen shot from VictronConnect showing the first screen. It will probably show a question, something like why is the controller not charging.
Are the panels in series, as you say, or in parallel?
It should be at least 5V above the charging voltage to allow the controller to push in current. If you have a 15 cell 48v LFP (lithium iron phosphate) battery and the battery charges at 52.5V or 53.5V then you'll need 5V more than than to ensure you can fully charge the battery.
Ok great. Thanks all. Have ordered more panels and will update once installed.
