Recent content by Computerizer

Okay, here's an updated plan based on all your feedback. Switched to Growatt SPF 3000TL LVM-ES. Added breakers in useful places. Adjusted braker sizes Added minimum wire sizes (some are larger due to length). How's it look now?

I'd rather go with a smaller inverter -- I don't need 5 kW; I'd be fine with 2 kW. The challenge I had was finding a 48 V all-in-one with lower power that also accepted the higher solar voltage. (I could put solar in parallel instead, but it's a 100 ft run so I'm trying to keep the wire size...

I've been having trouble locating all-in-one units that meet my requirements: 110-120 Vac (US), 48 V battery, 320 V(oc) solar; and don't cost a hell of a lot more than the PowMr (and PowMr also sells Growatt on their website -- not sure what their relationship is).

Okay. In the searching I did I saw mixed opinions on tapping 12 V light that. I figured since it would be small loads it wouldn't be a big deal and not worth spending extra money on another DC-DC converter. Does everything else look okay with my plan?

I'm in the planning stages for a 48 V on/off-grid system for backup at home. I was given 2 kWh of brand new LiPo cells from my employer (they'd purchased them for a project that we never ended up doing). I know LiPo isn't the best for this, but they were free, so... I'll use them for now and...

So it seems like in my case having 4 BMSs, each with a 13S battery, would work great. I attempted to purchase 4 BMSs from Daly, and got a message from them saying that they cannot be used in parallel on the same circuit, so if I intend to do that I should cancel my order. I sent them the...

Ah, okay. That's very helpful, thanks. I can see how the BMS would work if it's parallel-first. I'll weigh my costs etc for having 2 or 4 BMSs (with different current limits) and decide where to go from there.

I'm putting together a 13S4P lithium pack, as shown: I'm experienced enough and comfortable enough to figure out the wire sizing for all the solid-colored wires in my diagram, which are meant to carry the load. However, the BMS needs to be able to measure the voltage of parallel groups of cells...