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Decided to take some time and have some fun. Made this battery tester, based mostly on the one David Poz designed. I think the only substantive change I made was I used a 4-pin connector so I could detach the lid from the body, completely... Next phase, testing.

I'm using a pair of 1" x 1/4", pure copper bars for my bus bars. Was wondering if copper was too soft to just tap the holes for attaching the battery cables, considering torque. I'm assuming 25 inch/pounds is good enough for a secure connection...

So, I'm trying something a bit different. Instead of putting a BMS on each battery pack, I took a voltage monitor and wired in an active balancer. This monitor is good up to a 24s pack, though I'm just using 13. It shows total voltage, the highest and lowest as well as the difference. The idea...

I'd like to build a 48V system, and have ordered an MPPT charge controller/inverter. I'm building the battery packs myself, using 18650 LiIo cells, and am trying to figure out the best configuration for those packs. With a nominal voltage of 3.6v, going into a 48v system, do I do a series of 13...

I'm trying to figure out how I need to wire everything up for my particular needs. I'm not building off-grid, (it would cost more than the property is worth) I'm trying to build in multiple backup, in case of power failure. So, I have Utility Power, a Generator backup and then Battery Backup...

Been going back and fourth on how I want my system to work. Here's the layout I'm thinking on, but I need a sanity check, to make sure there are no obvious issued, then I can start creating more detailed plans. Thinking of pulling a 120V line, with a 30a breaker, from the Main Panel to my...

Building a 48V system, and have received the MPPT (Renogy 48V 3500 Solar Inverter/Charger), but don't have the batteries or solar panels yet. What tests can I perform on the controller, with a multimeter, without plugging it into panels or batteries? Any resources that cover these issues? If the...

So, my Inverter/Charge controller is 120v, but the input is up to 40A. This is from Utility. Does this mean you can run two 120v inputs, on 20A breakers, provided they are on the same phase?

I'm making a fail-over battery backup for my freezer and a few low-power appliances. Anyway, here's the wiring setup I'm looking at. Just want to make sure I'm not missing anything. What's not shown on the diagram, Each battery pack has it's own fuse. Batteries will be attached to a buss bar...

Before I plug anything in... This is a temporary setup. I'm just going to be testing the various components, to make sure everything is working as it should before I move forward with the installation. I wan to test the discharging and charging cycles. Test each battery pack separately, etc...