Ivanlrx Posted December 19, 2019 Share Posted December 19, 2019 Good day all I have a 5kw Mercer inverter with 2.7kw solar panels and 2 off 24v 200Ah revov lion battery in series so I have a 48 V system the issue I have is that as soo an the battery are close to full my wattage from the panels drop and I'm starting to use battery power and not solar only can any 1 help me to rectify Kind regards Quote Link to comment Share on other sites More sharing options...
Coulomb Posted December 19, 2019 Share Posted December 19, 2019 5 hours ago, Ivanlrx said: as soo[n] an the battery are close to full my wattage from the panels drop and I'm starting to use battery power and not solar only When the inverter decides that the battery is full, it switches from bulk/absorb stage to float stage. Usually, the float voltage is a little lower than the bulk/absorb voltage, so the battery will lose a little state of charge; it's usually only a percent or two. During this time, the loads will be partly supplied by the battery. Is this the behaviour that you are seeing? If so, your problem seems to be a disagreement between the inverter-charger and the battery BMS or battery monitor (e.g. a Victron BMV) as to when the battery has reached 100%. That's a matter of getting the various settings correct and in alignment with each other. The other possibility is that the inverter-charger is suffering from the premature float bug. This causes the inverter-charger to switch to the float stage at too low of a battery voltage. One solution to this is to update to patched firmware. You didn't say exactly what model of Mecer 5 kW inverter you have, so check Can I update my firmware, and if so to what? Quote Link to comment Share on other sites More sharing options...
Strini Posted July 29, 2021 Share Posted July 29, 2021 Hi everyone, I just purchased a brand new Mercer inverter 2.4kva 1440w. I connected it, connected to the AC and nothing is coming on. I pressed the power button and the LED is not lighting up. I did connect the 2 batteries but ev if the batteries are dead, the LED should light up. Did I do something wrong? Quote Link to comment Share on other sites More sharing options...
Coulomb Posted July 30, 2021 Share Posted July 30, 2021 13 hours ago, Strini said: I connected it, connected to the AC and nothing is coming on. It likely doesn't power itself from the AC-in. Very early models did, some advanced recent high power models do. 13 hours ago, Strini said: I did connect the 2 batteries but ev if the batteries are dead, Perhaps the wrong port (e.g. connecting battery to PV port)? If the battery is very weak, it could fail to charge the bus capacitors and so not even generate output with zero load, but I agree that before that you should see some LEDs come on. You might have a rare DOE (Dead On Arrival) machine. Quote Link to comment Share on other sites More sharing options...
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