Recent content by Redbeardbeer

Hi all. Can Solar Assistant with a Pi work with the JK BMS's RS485 protocol? Looking for a way to remotely monitor my battery that has a JK BMS attached.

Oh and yeah the inverter has an MPPT solar controller built into it - I just don't think it was happy about having a battery in the mix. Dunno. Seems better now with a proper external solar charge controller.

Ok so I have put a solar charge controller POWMR in the middle so now the setup is as per the pic below and it appears to be working and not doing the weird current draw as before. The only question I have is, when I put a clamp meter on the main live feed in the power box of the house, the...

Hi all. I'm in the process of adding a battery to my solar system. Currently have: 2x200 watt panels wired in parallel with a pair of Y cables. Panels are a 'no name' panel from a local supplier (I'm in New Zealand) so I assume they're chinese. The spec sheet doesn't give much away apart from...

They're just standard lithium-ion I have a JK BMS

I used a bit of info from HB Powerwall. He has a lot of details on his videos

Cheers for that. I went a different route and have built a 14S32P setup with 14*32P bricks daisy chained/serial together to get to 48v (58.8v fully charged). I used nickle strip on the negative of each of the 32p bricks and soldered nickel 'straps' onto a 6mm2 copper cable to act as the bus...

Cheers - yeah - just playing around for now with this setup. Enjoying learning as I go (and generating 'free' electricity is a bonus haha). I'll see how low the min the Powmr will allow me to go. I think it only allows me to go to 36V but will see.

Ok I have wired up a test setup as per my drawing (thanks MSPaint haha) but I have an odd issue/observation. After 'some time' with the BMS discharge off and charge on, the inverter draws too much from the solar that the voltage drops below the Powmr's low voltage cut off and as there is no...

I've got a cheap one and a clamp meter that cost more but probably only because it's a clamp meter, but they both read 0.08v out difference to each other. I'm not sure which to trust - even my el-cheapo MDS120M scope reads different again - about 1V too high! Not sure what to do - stupid mistake!

Hi all. I made a boo boo and update the 'calibrating volt' setting with a figure that is not accurate. I have 2 meters but neither of them I trust 100%. Is there a way to reset this to what it was from factory?

I can set the inverter to only draw XX watts or XX amps from the DC side - which would mean anything over that from solar would go into the battery to charge it, or it would not be used. Problem is working out what to set that to as if I set it too low, then could 'waste' some of the power, and...

I want to use a battery so that I can supplement some usage when needed. For example if my idle/unoccupied load is only around 200 watt during the day, but I'm generating 350watt (for example), then the remainder can go into the batteries and they can be used later on. This is more of a proof...

Can you suggest a resolution? Or is a grid tie system just not able to work with a battery?

It is - sorry should mention that the two leads for P- and B- coming out of the BMS are joined to the same bus bar inside the BMS - they are effectively one on each side.