I hooked up a 2 amp battery maintainer to the PS54 ac output. The battery maintainer is hooked up to my gas generator battery. The gas generator is brand new but the build date is 1.5yrs old. The gas generator battery charged up quickly and starts up fine so the battery appears to be good. The PS54 was charged up to 100%. The maintainer initially started with charging at 16watts output but within 1 minute dropped down to 0 watts outputs as the generator battery is fully charged. The maintainer is at the float mode so it shuts off thus 0 watts. As the generator battery discharges the maintainer kicks on for a few minutes to bring up the battery to full. The discharge rate of the generator battery is very slow since it is dormant so the maintainer probably does not turn back on for days.
I checked the PS54 level 6 hrs later and it stayed at 100%, 0 watt output, and the maintainer showing float stage. I checked the PS54 9 hrs later and the level dropped to 60%, 0 watt output and the maintainer still showing float stage. Why did the PS54 do a large discharge over night. I do not think the inverter consumers that much watts. Could it be the generator battery is not holding charge and overnight the maintainer goes into full charge mode at 35watts or is there something wrong with the PS54/PS54 Lifo? Been 6 hrs and the PS54 holding at 60%, maintainer showing float charging and 0 watt output. I have not witnessed the maintainer going into any charge mode.
Note when I tested the PS54 on a discharged battery, the maintainer went into a full charge mode 2amps drawing 35 watts. Otherwise on a fully charged battery the mainatiner intially asks for 16 watts and then proceeds to quickly ramp down to 0 watts within 1 minute.
@rosros Please do a full cycle of charge and discharge. When you do the full cycle of charge and discharge, please ignore the SOC. Please completely drain the battery until it automatically shuts down, and then charge it with AC until it is fully charged and the light of the AC charger turns green.
Your gas generator battery could be requiring additional charging as you suggest but the PS54 uses standby wattage and increases that consumption when the AC inverter is on even without any outgoing load. An easy way to test if this is the issue is to leave the unit on overnight with the inverter on and one night with the inverter off to compare the state of charge with each scenario. One other thing to consider is that the battery meter on the PS54 shows only increments in 20% intervals. The difference on the display from 81% to 79% looks huge but is only 2% difference in actual charge. If you treat the meter as a rough estimate you will be more satisfied overall.
I am doing a full discharge/recharge as suggested. But it still seems crazy that with no load and the inverter on the Bluetti battery will discharge so quickly. Seems the discharge is in steps. Yesterday initial discharge dropped and then held steady at 60% for over 6 hrs. Then overnight it dropped down to 20%. The inverter at idle should not be pulling this much power–must be like 50watts! Scott, I will test this once fully charged as suggested. Bluetti did eventually contact me and admitted the solar generator does consume in splurges while at idle. If excessive, they will replace the unit. So this is not the best for stand a lone trickle charging. Bluetti should have auto sleep and wake up mode; seems like an easy software fix.
I don’t think the consumption is in splurges but it is the display type that only has the ability to display in 20% increments. It can go from say displaying 40% to 20% in seconds if the state of charge is right at the tripping point of 41% in that case. It operates the same as if your car gas gauge would only display Full-3/4-1/2-1-4 but the needle could only point to one of those four positions.