Search results

I have a friend wants to do a ~12v 300ah pack for his van. Whats the simplest to configure ~200A BMS to recommend?

I want to run a high current motor for 5-300 seconds, within the C rating of the cells. Lets say 100AH cells @ 3-5 C, so a 500A spike then maybe 150A continuous, with the odd ounce higher. That means a BMS that can handle 500A. This is easy with a Solenoid, difficult with a FET setup. Who...

Consider them in series with one boosting the other if your loads are controllable. Means you can shut one down, and no complex integration for parallel. When configured in Parallel you cannot run only one. Read the wire sizing docs very carefully, it's how they balance the AC load between them.

Advantage of Winston is you can build a 4s or 8s or 16s pack in the capacity you want, no parallel issues. Most others need parallel.

I bought one. Summary is for 48v it works well. Not silent but much quieter than AIMS junk. Seems to get about 1.2kw on 110v with good voltage profile. Again, much better than AIMS. I was hoping to hold 1.7kw, but it wont do that on US voltage. Gotta be careful with the IEC cord, as cheap one’s...

Very interested in your results. I had the AIMS - it was terrible I have had other good Meanwell stuff

Has anyone tried the MEAN WELL NPB-1700-48 I have some industrial experience with Meanwell and their stuff is bulletproof. https://www.meanwell.com/Upload/PDF/NPB,NPP-E.pdf I had an AIMS 25A 48V charger, and it was terrible. Super noisy cooling, very hot and always pulling back to <50% charge...

Due to space constraints, I'm considering stacking 8 Eve (or similar) cells on their sides and stacking vertically. 2 towers of 8 = 16 cells = 48v system. Has anyone a) Run their cells sideways? b) Stacked 8 high? I figure the stacking is the same as compression. That should be fine...

If it's switch mode (ie. feels light, not heavy), then it will be much weirder than that. They tend to draw weird harmonics from the peak voltages to charge the supply capacitors through the rectifier. Means often the cycle is almost no current for 70% and only drawing current for 30% or less...

It your fan noisy (fast speed)? And sometimes never slow down / shut off when charge finished (stay noisy) At the full charge rate - how much heat comes out? Does the charge rate slow down to about 50% after 30mins due to heat?

36/48 48v system

I have one of those. It's terrible. Noisy, slow to charge and produces as much heat as is does charge. Always heat limiting it's output, with the fan going nuts. It's in the same room I am. Near match for the Victron color scheme. Not much else.

Have BMS / CANBus This is the insurance when that goes wrong.

On alternator disconnect due to BMS opening (or other reason), the inductive voltage spike kills rectifiers, regulator and other things. 48v nominal has no protection devices on market. One solution is hard wired lead acid in parallel, but 4 batteries is heavy. What about a ~100V supercap...

All feedback says it's difficult to get any device that clamps / dumps very rapidly at over 56v and less than damaging (say 80V or so). Doesn't sound hard, but seems to be so. I'm thinking now about putting Ultracapacitor array inline, that would soak up a lot. I just need to find one that has a...

Have you looked at Class T availability lately. All out of stock for 3mths now in many sizes.

I have a 48v nominal system. Real voltage is up to 56v or more. I have real trouble finding Large Fuses (class T is ok) Small Fuses (some glass are ok) Large Switches (none so far, only solenoids) Circuit Breakers (several types) That are rated for 60v DC What is your experience? Fyi. I had...

Update Alternator was ok Controller dead. WS support was outstanding Back running again with uprated class T fuse. Interesting note. The dead fuse would test ok with a multimeter, but be open under any minimal load.

Generally there is a fusible link. Wire that performs same with less flammable insulation.

No 48v option :(

Further investigation showed alternator tested fine. regulator was toast. New regulator arrives next week. Testing with adjustable DC supply to rotor shows good output. I'll increase the fuse to 250A and install the new regulator. I think there will be some FAQ learnings for the APS alternator

The challenge with super/ultra caps is a) balancing - like Lithiums b) surge current terminals - could be a couple of hundred amps c) batteries hold energy in the top 20% of voltage. Cap energy is 0%-100% voltage. My elec engineering is real rusty, but that means you have 80+% of capacitor...

You can choose to wire either way (but not both) Most of profile appears to be voltage programmed, with ability to limit max charge A.

2.85:1 from memory

Yes, some intensive discussions have occurred. First pass seems that having BMS, Victron 712 and AP/WS500 on single shunt gives interference to current measurements. Second dedicated shunt installed.

Hard to say the exact moment it opened, but engine was at about 2500RPM BMV712 and CerboGX. I was watching. But I do blink / look at forums etc BMS is a risk. Alternators and Lithium are a tough combination at 48v. I'll get it fixed and keep the experiment going.

Much as I hate to say it, Multiplus or Phoenix My AIMS is much less efficient - Heat & Noise

My multiplus 5k charges my 48v pack at 1900w, though the generator runs better at 1700w. I also have an AIMS charger. It's crap. Equal amounts of Charge / Heat / Noise.

5 minutes approx. Open air space, in view of me. It was silent when it opened. I asked re. Sterling. Answer was a firm NO. Seems avalanche protection is difficult at 48V from what I have heard. Both Sterling, Wakespeed and APS said there was no easy solution due to operating ranges. ie. By...

Fuse should not have opened. System was operating fine. Inverter, solar and battery continued to operate fine.

48V system. 56V 160A APC alternator. WS500 Regulator. 200AH Winston cells. Running at ~160A during commissioning, when, we think, the 200A Class T Blueseas fuse opened. Took out the alternator rectifier diodes (internal) and the WS500 regulator. Also opened the 15A ATC fuse to the regulator...

Cerbo GX and BMV712 tracks power Does the BMS also need it to control limits? Yes, I could piggyback off the same shunt. Messy wiring though. Another pair.

How critical is the current Shunt input? Anyone tried to get the Shunt current info Input via CANBUS from Victron? (yeah I know, crazy)

I hadn't seen a diagram in the manual, other than the slow charge unit. Is the IO 4/5 simply programmable N/O contacts or is it 12V supply? (assuming 48V system)

Can the REC Q IO output directly drive the Kilovac? The instructions are unclear on how the IO ports should drive and their capacity limits. Pins 4/5 are "internal relay" No more information than that. Thanks Paul