Recent content by mikefitz

The controller should charge to a target voltage, boost volts, ( absorbtion voltage), then after a period at constant voltage drop to float volts. The concern discussed in the video is that the controller does not drop to the lower float, but continuously charges at the higher boost volts. This...

No, the monitor does not need to know battery type, it just measures volts and amps, does some sums and estimates SOC. Both the Aili and the BMS will have errors, especially if low currents are involved.

No, I was discussing the boost duration, this is the absorbtion period where charge voltage is constant at boost 'target' volts. With a low charge current and a large battery this time duration can be zero or a short time, say 30 minutes. Some SRNE solar chargers get confused if the boost...

The battery is in protection mode. Try, Disconnect from the charger and apply a DC load greater than 2 amps. Else, Connect to a 12v source , car battery or power supply. ( not a charger, many chargers will not function unless they 'see' a voltage from the battery). There are 4 options in the...

The charge voltage with battery loading is no different from charging off load, the current into the battery is just less than with no load. With a 50 amp charger and load of 15 amps, that's 35 amps into 560 Ah battery. With this very low charge rate by the time the charger hits 'target' boost...

The Victron battery protect is a one way device, cannot have both loads and chargers on the input. Also no inverter loads are allowed on the protect output. The Smart Solar can disable charging based on the information from the BMV temperatures sensor. The Victron stuff talks each other, VE...

Agreed it does not indicate the SOC, but it records the duration of charge, absorbtion and float for the day. With the low charge currents of the proposed system, by the time the battery reaches absorbtion volts, 14.2 default value, and drops to float, you can be quite confident the...

Connecting 12v batteries in series, each with its own BMS, to create a higher voltage battery will eventually have balance issues. You can add battery ballancer hardware to help solve the issues, but its good engineering practice to have a 16 cell 48 volt battery with a single BMS .

There have been reported issues with the terminals on Battleborn batteries becoming disconnected internally.

This is unlikely. The most probable is the alternator or the control electrics for the alternator, being faulty. ( some alternators are under control of the engine ecu). Many vehicles have battery current monitoring in the path between battery ternimal negative and frame/vehicle metal...

Poor quality low cost breaker, replace with Bussmann/Blue sea, Example, https://www.ebay.com/itm/395209237520

Renogy batteries seem to cause problems for many users, a search on this forum will bring up many issues. It's possible the battery is in protection mode. 10.8 volts and 78 % SOC cannot both be true. A protection short should self recover unless the BMS is damaged during the short...

Seems a satisfactory situation. 13.5 volts is slightly above resting voltage so the battery will remain 100% stare of charge whilst also powering loads. 14.2 volts absorbtion even with a short absorbtion period should reach full charge.

If your system has 230v AC appliances/ lights and includes a inverter in 'eco' mode, then it's in standby until it 'sees ' something consuming power. The setting in the inverter for detection of power use may be adjustable. More details of the equipment installed would be useful. Mike

Yes it lasted 15 seconds. Recomend a 'real' charger, Victron Tr Smart, https://www.ebay.de/itm/134004769323