Solar panel mounting on RV

[Firetodd]

I can’t seem to connect to the MPPlv6548 through the WatchPower app. Does anyone have any tips?

 

[HRTKD]

Looking good Todd!

 

[Firetodd]

It’s crazy, here is my solar input right now, but I have a 3s2p panel setup that should be 18amps, at about 122 volts at peak. I know amps will be less if not need by battery and voltage will be less, that seems way off.

 

[HRTKD]

It’s crazy, here is my solar input right now, but I have a 3s2p panel setup that should be 18amps, at about 122 volts at peak. I know amps will be less if not need by battery and voltage will be less, that seems way off.

Image?

 

[Firetodd]

Image?

Sorry pictures just posted above. Cell coverage kinda sucks.

 

[HRTKD]

Does your monitor know the total Ah capacity?
Is it set for the proper battery chemistry?

My Victron battery monitor needed a couple charge/discharge cycles to get synced up so it could display the correct Ah remaining.

 

[Firetodd]

It says LifePO4 and here are my settings

 

[HRTKD]

Is the last picture from the Victron BMV? And the prior pictures of your solar charge controller?

 

[Firetodd]

I have the LV6548 so it’s an all in one solution. Prior pictures were display of that. I have the Victron shunt as well, with a Daly 250amp BMS.

 

[Firetodd]

I’m on the boat now, so I’ll climb on the roof when I get back and check connections. I suspect something is not connected for my parallel string.

 

[Lt.Dan]

The LV6548 doesn't know battery capacity or the chemistry if you have it set to USER parameters. What are your bulk and float voltages? Also check the parameters for max charge current and such. Go through them all and check if there is anything out of the ordinary.

 

[Firetodd]

I just went on my roof and my rear series panels are putting out voltage and amperage. But the front series are only putting out voltage?

 

[Firetodd]

So i’m only getting 1/2 my solar power?

 

[HRTKD]

Oh, you got sent the low amperage versions.

Bad connection? Blown fuse?

 

[Firetodd]

Man…. To get those panels up and double check each panel connection is going to be a real pain. But if i’m getting the correct voltage would imply a connection.

 

[Firetodd]

I’m getting 762 watts right now from one set of 3. What setting should I use on the MPPLV6548 for float, bulk, and equalization?

 

[HRTKD]

LiFePO4 shouldn't have an equalization phase. If you can disable it, do so. Otherwise, I think I've read that making the voltage for the equalization phase the same as the float works.

 

[Lt.Dan]

LiFePO4 shouldn't have an equalization phase. If you can disable it, do so. Otherwise, I think I've read that making the voltage for the equalization phase the same as the float works.

You can disable the Equalization. And yes, it should be disabled.

 

[Firetodd]

Bulk charge is default at 56.4 and Float is default at 54. Equalization is turned off. I’m kinda bummed that only half my panels are working, but I ran the air conditioner for two hours last night and the Kuerig coffee machine this morning and the TVs, and the microwave and right now my batteries are full.

I put away the generators and haven’t used them in over two days and have had full batteries! I think I’ll run to town tomorrow and grab my other 4 panels. On a future trip up, I’ll swap panels around and make sure i’m using all 6 on the roof. The Ill set up what’s left on my patio cover and run them into my second input on the LV6548. My goal is to be able to run the air conditioners strictly off solar. All is looking well! I can’t believe I have 120VAC l, in a set it and forget it system!

 

[Firetodd]

Since i’m currently bringing in 800 watts, to have the possibility of having 3500 is insane!