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MPPT 100/30's not cooperating and only one charging.

System: I have 3 SmartSolar MPPT 100/30's connected individually to (3) 335W panels. They are networked together with a BMV-712 and connected to an 800ah LFP battery, with smartsolar battery setting on LFP. I just switched my battery bank to lithium from AGM, but I had the same issue with the AGMs. In the past, my shore charger was mostly charging the bank, but now I need to switch to solar and Multiplus as I will be leaving the dock soon.


Problem: Only one of the chargers is producing significant wattage (264W currently), and it seems to be charging the battery, although network total power shows 0. The other 2 chargers flicker some wattage and then back off to 0. It seems like the master controller is telling the slave controllers to not charge. In the smartsolar history, one can see that the all the chargers are working as they each have history on some past days of significant charging. I need all of the chargers to work together to charge the lithiums which are currently at 13.18v. Another anomaly is that 1 hour ago I was showing total network power of 255W. I removed each controller and the BMV from the VE network to try to reset it and then rejoined them all, BMV first. Now, total network power shows 0W, but the BMV shows positive wattage (175W) going into the batteries. Mostly, I need the chargers to all work together, instead of just 1 at a time, to bulk up the lithiums during the day. It seems like synching between controllers and the app may have glitches that prevent synchronized charging and also an issue with showing total network power.


On a sunny day this system should be pushing 900W plus into the batteries. Any suggestions?

mppt smart solarVE.Smart Network
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How far are the 100/30's from each other? Its not just the distance of the MPPT's to the BMV that matters when you're trying to get network power to calculate and cooperate.

What happens if you delete the VE.Smart network and run each device individually? If the wiring is reasonable each should now produce full power during the day? Might be a solution while you're troubleshooting the network which I've also found unreliable over even moderate distances. If each device is set correctly cooperation only matters at the end of bulk charging or if there's a big distance between the MPPT's and the batteries.

Thanks. They're close to each other. About 1 inch apart from each other and about 3 feet from the BMV. I found 2 of the MPPT controllers are bad when i hooked them directly to one AGM, completely isolated. They will pulse up wattage briefly, but always scale down to 0 rapidly. Not sure what is wrong with them but I will try to exchange them.

Any update on this? I have one of

three 100/30s doing the same.

Are your panels producing any voltage being read by the mppts?

To troubleshoot I would disable charging on the workaholic and see if the others kick in. Disable the smart network as well.

Sometimes the one is doing enough where the others do not need to be doing anything.

1 Answer
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jwfrary answered ·

Are you using VE Smart network and its connected to a gx device at the same time?

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