I have pulled out the battery bank, and this one has cells arranged in a weird order also...A new version!
The latest one I opened up has a different failure, and a different control board...
This one has 3 red/black pairs of wires, one of which is soldered to the BMS...
And the cells are depleted to 5ish V... but the BMS has not failed I don’t think... I get readings on the P- terminal...
Nope, this one has a bad BMS also, but the fets are on the positive side instead of the negative side.
Ok, I am having trouble finding mounting screws that fit these...Here is the Two XT-60's I put on the casing. Yes there is the "cutout" for an XT-60 connector in the middle there but looking inside the case, the mainboard rests on the clip at that location and so I mounted them where I did. On my other unit I did the same thing but to the right of the original charging jack but that was a bad idea due to all the wires going up to the mainboard at that location.
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Reason why I put two is because since I have multiple units, I can stack one on top of another and daisy chain each unit off of one line going to the solar panels.
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Inside view. The wires coming from the input jack will need to be at a right angle. This is due to clearance. If I put them straight then it will be pressing against the battery/BMS. (Another lesson learned from my first iteration.)
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Other end of the wires are soldered to the other end of the original solar input. I figure if it blows anything due to too high a current, it will probably blow a trace on the board instead of sending all the current to the mainboard/battery.
this is mostly a question new here..i have 5 with one that the bms is bad but the boards on ebay dont have the xtra 5 wire plug that goes to front panel..do all the functions still work..3s10p 26ah?? or is the old board still partially connected i dont have a schematicI have taken a few apart. The one that I feel has good upgradability is the Rockpals 300watt. The layout is pretty straightforward. Battery inside is pretty easy to change out/take apart. Battery is connected using a XT-60 inside. 3S10P. I have done some modding on mine where I made a XT-60 input connector on the housing.... Added another to where I am able to daisy change multiple units to charge. Connector to add external battery. All in all a great unit. I have mine running with AC inverter on 24 hours a day for the past year without it skipping a beat. The weak point on the unit is the BMS. The BMS that is soldered to the batteries seem to frequently go bad. I picked up six "for parts" unit on eBay and each one has the same BMS issue. BMS is cheap off eBay. I pick one up for $7 on ebay and everything works great again for each one. Battery's are all good on each one.
The original board is entirely removed.this is mostly a question new here..i have 5 with one that the bms is bad but the boards on ebay dont have the xtra 5 wire plug that goes to front panel..do all the functions still work..3s10p 26ah?? or is the old board still partially connected i dont have a schematic