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It may lead to over stress. With small solar systems, charging at fractional charge, the battery will be almost fully charged when the boost voltage is reached. The boost duration of 120 minutes will just stress an already charged pack of cells. Many of the settings on the Epever relate to the...

I suspect the OP is on a 'wind up' mission , rather than a constructive discussion. Mike

Its more than PAT testing. To comply with mobile regulations you will have to install equipment that allows safety equipment, RCD to prevent electrocution. Not all inverters allow easy implementation of the neutral to earth bond that is needed. Renogy Inverters are mostly not suitable...

The plastic mounts have been known to fail and panels becoming detected. This is due to the release agent used in the manufacturing process of the mounts compromising the bond of the sealent adhesive used. In addition UV degrading and localised stress cracks around any fixing can cause issues...

Mike

Electrically its the same connecting directly or using buss bars , ( providing the correct gauge of cable is used for connections). The practical limitations are that multiple connections to a battery terminal may/will exceed the capacity of the bolt or stud connection point and over stress the...

The PZEM is not very useful as a battery monitor since it cannot distinguish between current flow direction. A more ideal monitor would be one of the following...

You can get a JBD 120 amp BMS from LLT for $60, that's quite good fire insurance. https://www.lithiumbatterypcb.com/product/4s-or-3s-12v-li-ion-or-lifepo4-battery-smart-bms-with-bluetooth-function-uart-and-rs485-communication-with-60a-to-120a-constant-current/

The battery terminal becoming loose inside the battery has been reported on this forum, https://diysolarforum.com/threads/battle-born-victorious.64848/ If you examine the design of the battery terminal, shown in Wills video , its a small section of copper/brass? flat bar bolted to the negative...

A 220 amp alternator wont be worried by a 60 amp DC to DC charger At idle engine speed the alternator output capability will exceed 120 amps. Most DC to DC chargers designed for battery to battery charging have built in voltage detection that Inhibit charge if the starter battery volts fall too...

It's an Amper Time battery issue, an Internet search will find similar problems, one example, Other comments, not related to your issues but will produce a safer and more efficient system. a) charging perameters are not ideal, start with the Victron default values, 14.2 charge, 13.5 float...

Did you bother to read my suggestions and look at the diagram in post #8 ? The solar controller you have is often used to control lighting with the load outputs so the lights operate during darkness. As soon as the daylight causes an Input from the solar panels the controller turns off the...

The voltage/SOC profile is very flat, the voltage rises slowly until near full charge. Limit the fully charged voltage to 3.65 per cell. Unless you carried out a top balance its possible one cell will reach full before the others. Charging the 4 cells as a 12v battery without a BMS with cell...

There are three techniques. Check the connection to cell set 2, confirm the BMS reading with a meter, check BMS cable and crimp. Lower your charge voltage. Dump charge from cell set 2 with a load , ( car headlamp bulb), apply across high cell set for several seconds whilst monitoring cell...

Change to a different BMS, the Daly BMS in some variants will not record currents at low values, often loads below 2 amps will not be recorded. ( in one case the BMS would not record load currents lower than 9 amps). This is perhaps your problem. Apart from sleeping issues, the SOC recorded by...

Solar panel heating in not cost effective. Consider a glass south facing frontage for your building. Use as thick as practical, 100mm or more, Insulation panels on floor walls and ceiling . This is the most cost effective method to reduce heating and cooling costs. Mike

The cell is setting the values are seeing. The power supply is set for two condition, a maximum output of 3.65 volts and a maximum current of 10 amps. Consider the battery in simple form as a resistance in series with an Internal voltage generator. The value of the voltage generator...

Multiple smaller batteries will have individual cell monitoring via the BMS. A large battery with several cell In parallel won't have that feature. Mike

With fuse type selection it depends on system battery type and voltage. The specification of the fuse will indicate, the working voltage range, AC and DC volts , and the current interrupt or rupture capacity. MEGA fuse, DC volts 32, interrupt capacity 2000 Amps, no ingition protection. ANL...

From information in the manual it is clear that any charge perameter can be setup for any battery type. For the GEL batteries used, a charge voltage of 58.4 to 59.2 is recommended. If the batteries are reading only 6.3 volts they are not being charged correctly. Suggest following the manual...

Now back with a computer and internet. Most issues have been discussed. Its a sorry mess you and the so called professionals have put together. I cannot see any sign of fuses as requited by regulations. Even as a temporary set up its wired incorrectly and is a safety risk, a good way to burn...

13.3 volts is not the charge voltage for 90%, 13.3 is the resting voltage for aproxametly 90%. Using that voltage as a charge voltage will, get the battery in the region of 50 to 60 %. Not charging a lithium battery over 3.4 volts per cell may cause cell inbalanced and reduce the effective...

You new controller is PWM, false advertised as MPPT. A true MPPT controller will cost a great deal more than $26...

You need to get to a higher voltage than13.5, you need to get to at least 13.8 volts. In addition cell balancing does not start to function until the cell volts are greater than 3.40 volts for most BMS. This needs a battery voltage in excess of 13.60 volts, ideally higher. 25 off 100Ah...

You only have passive balancing, thus only high cells are 'pulled down' to low cell values. It's probable you have set 'balance only when charging', hence no balance activity in the capture pic. Set voltage to start balance at 3.4 volts with a delta of 15mV. Your pic shows a fully charged...

The DC input on the powerstation is used for DC power or solar panel, 11 to 28 volts, 120 watts, 10 amps. Connect your panel directly not via a external controller. The unit has an internal controller that accepts panel directly.

Sounds like BMS shutdown of charge path. This will reduce the effective voltage seen at the terminals. The battery cells may be near full charge, 13.5 volts, but the BMS volt drop, 0.6 volts gives 12.9 at the terminals. Setting the charger , if possible, to a lower charge volts could stop cell...

It will but ideally you want a dc to dc battery charger, like the Victron Orion Smart charger. This, unlike the simple dc to dc charger that will only generate a fixed output voltage, has battery charging profiles that will correctly charge the battery. For example, once the charge is complete...

I live part time in South Portugal. Do you actually have a permit ( habitation licence) to live in the dwelling? The approval for anything is time consuming and expensive and all work carried out by a registered builder/electrician and has to be signed off by a professional from the council. Any...

The screen shot indicates the battery is almost charged. If you could determine the actual current into the battery is would be useful. The 9 amps may indicate battery Input and inverter use. Even 9 amps Into the battery is 2% tail current. As I stated earlier if the 540 Ah battery current...