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Does anyone know the reason a that the SCC electronics are damaged by having the PV panels connected without the battery power source connected first? You always hear that you should connect the battery first before connecting the solar panel voltage and you should always disconnect the solar...

I'm looking at the EP Tracer BN 30 amp model because it physically fits into a build I'm working on. I really want to use 4 100 watt Rich Solar mono panels because they fit onto a cab rack on my Tacoma. The specs of the charger unit says max 390 Watt at 12 volt for PV input ..... do you think I...

Does anyone have any experience with this battery from Walmart? https://www.walmart.com/ip/LiFePO4-12V-20-24ah-Battery-for-Indian-1638-1638-Chief-2002-2003/179472407

Can you connect panels of different sizes? Like a 160 watt Renogy and a 100 watt Renogy? Would parallel connection cause an issue with mismatched voltage? Would a series connection work better by just producing a sum of the two panel's output voltage and letting the mppt controller deal with it?

I'm discharging my 280ah LiFePO4 cells from Xuba to bottom balance them. What is an acceptable delta in the cell voltage? Right now they are about 0.074 vdc between max to min (3.141 max, 3.067 min). Thoughts?

I just got my BMS (4s DYBK) but I'm still waiting for the batteries. Does anyone know if there is a way I can test the BMS without hooking it up to four lifepo4 cells? If you put 12 vdc across the red and black sensor wires should it come to life enough so that I can test the bluetooth module...

I'm looking to build a small "ammo can" battery box; max 2/100 watt panels and sealed lead acid batteries that will fit in the can. Any favorite cheap PWM charge controllers you like? I was thinking about 20-30 amps. I have been looking at that little blue unbranded unit that shows up everywhere...

Looking at the Giandel 1200 inverter, the specs have the cutoff voltage as 9.8 VDC , that would give a 4s lifepo4 battery a cell voltage of 2.45vdc . The minimum cell discharge voltage for lifepo4 is 2.5vdc ... anyone every have any problems with this situation? I suspect the 0.05vdc difference...

Hi All, I'm ready to build a 100ah LiFePO4 12v pack for my camper. Any suggestions on what's the current hot deal on a set of four cells and a full function BMS (low temp cut off sensor and separate charger connection). I'm not averse to Aliexpress if it's a well known store. Thanks.

Does anyone know if there is an iPhone app for the BMS Will links to in the diy lifepo4 battery section of the mobile solar-power web site? All I see on the manufacturer’s site is an android app.

Is there a difference between panels you would use for an off grid system versus a panel you would use for a grid tie system?

If the Common port BMS sees a condition that disconnects the battery from its output won't that cause the SCC to be disconnected from the battery and allow the solar panels to damage the SCC? If you make a secondary connection directly to the battery bypassing the BMS connection that will assure...