Mike Nofal

Thank you Coulomb, Appreciate you taking the time to give me these answers. Very helpful indeed. Regards, Mike

Good day all I have a newly installed system Axpert 5Kva SOL-I-AX-5P 8 x 200Ah 12volt sealed gel deep cycle batteries connected in two banks 48v each, series parrallel , so 48v with 400Ah battery. Currently totally reliant on the grid, no Solar connected yet. If my average load is 1500 watts and I want to only drain batteries by 40%, how long will I be able on my batteries as per above. Is there a formula to work this out? 1st question, got it set to charge up to 58.5 volts and to float at 55 volts. When there is a power outage or I simulate one, the voltage drops down to about 52 volts within minutes, even on a 800watt load. It seems to then drop very slowly. If I switch on the aircon, as an example, it uses about 1000watts when running, this drops the voltage at a slightly faster rate, then if I switch the aircon off battery voltage improves again. Is that normal? Also I set it to 48volts to shut down batteries, is that voltage ok to shut it off or is it to low or to high. 2nd question, the fans run consistently, although quietly when batteries charged and on float. Is that normal? Obviously when the system is running on battery fans run faster and slightly nosier then on recharge the fans make quite a racket. Got the battery AC charger set on 40 A . 3rd question, where to get the latest power watch software - any links please, Lastly for now, if I relocate the inverter to get less noise, its currently in my living room, how far away from the battery banks can it be located. I have nowhere else to move my batteries, could put inverter in next room but that means the pos and neg to the inverter, those 16mm cables, will be 4 to 5 metres between inverter DC connectors and first connection to batteries. Any advice please. Another quick one, I have circuit breakers on each bank of batteries, could I isolate the batteries once fully charged and then just switch then on every week for a few hours. I am told these deep cycle batteries can hold a charge for 3 months - is that true? Info, advice on any of these questions will be much appreciated. Thanks all Mike

I have a 24 v axpert 3KVa inverter. Not the plus model. In terms of the MPPT charge controller it says 600W max 75voc @ 25 Amps. What does this mean what panels do I need to buy to make max use of the above specs. Any help is appreciated Mike from Durban, S.A.