Recent content by WrenchLight

Since the MPPT can take up to 450V, you need to put the panels in series. With them in parallel, you're asking the MPPTs to draw more current than they're rated for. I'm assuming the 48V/80A is for the battery input.

Here ya go (attached). No idea why they don't just have it on their website.

On the bottom side of the control board, there are three LEDs. The one on the right is power. The left one (middle of the board) is for the DSP processor. The middle-right LED is for the ARM processor. Both of these flash to indicate operation. If either is not on or on solid, that processor is...

Are you asking for a "friend"? Did this "friend's" BMS disable charging due to over-current? If so, maybe disconnect the low battery and allow the rest of the batteries to discharge down to where the voltage difference is less than 0.5V and then try connecting it again. But if nothing exciting...

Here's a little "insider knowledge". A lot of installers use Enerflo ( https://enerflo.com/ ) for the whole process. I have no idea on the pricing. Without that software package, the installers would be as lost as the rest of us (or more so). I share your frustration. I'm going through the...

Yes, there are others on the market. Here's one example (12kW and 16kW): https://www.megarevopower.com/productinfo5.html

The cell datasheet should have the specs on what is fully charged. Usually it's something like 3.65V @ 0.05C rate. So 0.05C rate would be for example if you had a 100Ah cell, 0.05*100=5A. So in CVCC charge mode, after the cell is in constant voltage at 3.65V, once the cell current gets down to...

Alarms can be cell overvoltage, pack overvoltage, pack undervoltage, cell undervoltage, overcurrent discharge, overcurrent charge, cell over temperature, cell under temperature, temperature differential, cell max to min voltage differential. Often, you can disconnect the positive power cable...

You need to disable the setting called "battery low capacity standby". Here's what this setting does: When the battery is discharged to less than the depth of discharge (DoD) limit, it disables grid charging and only charges from solar. Not even setting it to battery priority will make it charge...

Enable "anti-reflux" to disable selling power back to the grid. Yes, you should install the CTs. The vast majority of inverter operation problems are due to incorrect installation of CTs. Make sure the arrow points towards the grid. Don't mix up line 1 and line 2. Install the CTs right after the...

There are inverters available that can interface with existing grid-tied solar. Unfortunately, you'd need to buy a hybrid inverter along with the battery. You don't want to connect the grid-tied solar to a generator. If the inverter ever is successful in sending power to the generator, it could...

There are a few reasons this can happen. Here are some: 1. The BMS can't keep track of the state of charge because it's using mostly coulomb counting with voltage correction. 2. The cells have become unbalanced. (most likely) 3. One or more cells is reaching end of life (less likely). Read the...

I'd let the battery rest an hour at zero amps with a disconnected power cable before attempting to check if the voltage is within calibration specs. If the battery is charging or discharging, you will get different voltages depending on where you touch the probes due to the non-zero resistance...

Charging low voltage cells is risky. Internal damage may not be apparent. Take appropriate precautions such as charging in a well ventilated area away from anything flammable. If you do try this procedure, you do so at your own risk. I have taken stored cells from as low as 0.4V and fully...

Oops. I forgot that option didn't exist in that firmware.