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I'd very much prefer not to under-size any of my components from the start. Even if a 2000W inverter would be marginally sufficient now, I would be constrained from adding anything else.

That's what I'm hoping, but I know swelling is a big warning sign. Hard to tell which is the case, unfortunately.

That's correct - 2015 Promaster 2500, Kansas City area

I'm just happy to finally have some clarity that it's not going to harm my LFP batteries :) I appreciate the help!

Solar Panels - In 3s2p, my only concern would be shading issues. If I understand correctly, I would essentially be creating two large panels from 6 small ones. If any part of the small panel is shaded, it would reduce the charge from the whole "large" panel.

They offered to send me a prepaid shipping label if I opt to return the batteries. I'll probably run some tests as best I can and then make a call.

I've contacted service at Ampere Time. We'll see what they say. Just wanted to see if others have encountered a similar issue with these batteries

Yeah, that was also a concern. I'm planning to install a second alternator in the van to charge the batteries.

I'm starting to fear that you're correct. I could wire my batteries 2s2p for a 24v system. I'd just have to return the Renogy 12v 40a DC-DC charger and find another solution for that. I'd also need to get a converter to step down the voltage for my 12v appliances and fixtures.

I found a 2.3kW solar panel system for sale locally. Eight 290W panels, 2500W 48v pure sine wave inverter, mppt charge controller, wires, breakers, combiner box, and racks to mount everything. Price is $700. Seems like a steal, but I could be wrong.

Ooooh. Good point to consider!

You seem very angry, and I'm not sure why. Just asking questions here.

I've got a 12v battery system (4x200ah 12v batteries in parallel). I'm planning to purchase 6x100watt 12v solar panels to wire in series pairs, and then parallel to generate 300watts at 24v. If my math is correct, this should produce roughly 12.5a at 24v. If I pick up a 20a MPPT charge...

Thanks for the response. This was just a test run for the equipment and connections. I only hooked up two of my 100W panels for the test. The shunt was showing roughly 140W coming in at 13.3V, so 10.5amps. Does the bulk phase run until the voltage increases to the 14.2 for Absorption? The...

AC, induction cooktop, and potentially an air fryer/oven

I'm still a bit confused. Does the input voltage matter then for a charge controller? At what voltage is the output amperage measured? How would you set up the solar for this battery bank? Any recommendations on 400W panels?

Any particular reason?

I already have the 4x 200ah 12v batteries, but I can wire them 2s2p for a 400ah 24v system. I've purchased a 12v 3000W inverter, but I can return it for a 24v one. I'd need to buy a converter to step down the voltage from 24v to 12v for my fan, fridge, lights, DC charging ports, etc. Do you...

Well, damn. I didn't realize this was an issue as well.

Thanks for all of this. I hadn't considered a DC-DC charger. Does that link the starter battery to my battery bank and charge off the alternator when the engine is running? In this case, any risk to the starter battery?

I have a Powermax 30-55lk from a previous power system that used lead acid batteries. I'd like to use it with my new system that has lithium batteries. It claims to be lithium compatible. The documentation is very limited, but it seems that it has two charging options: 3-stage or fixed...

Great call! More homework for me to do now.

3000W inverter

Yep! Just trying to solve the DC-DC charging situation from the alternator. I accidentally bought two Renogy 40a 12v DC-DC chargers. Trying to figure out if they can be wired to provide 24v charge.

Not sure I follow... Wire one DC-DC charger to each parallel pair of batteries?

They're 40a 12v chargers. I want to connect them in series to supply 40a at 24v, if that's possible and if it won't nuke my 180a standard alternator. Just not sure if it's possible or how to set up the connection.

Thanks for the info. Do you know which specific converter charger comes standard in the 30-55lk? I pulled the converter out but it's completely unmarked. This will be in a camper van and used mainly when connected to shore power. I could see using a generator, but that wouldn't be normal...

It's a power center.

I'm very interested in using the Renogy DCC50S as a simple solution for solar and alternator charging. It is capable of handling up to 660W of solar, but Will recommends 400W in his schematics, due to the low voltage limit (<25v) and the inability of MC4 connectors to handle over 30a. My...

The charger in my 30-55LK seems like the equivalent to the PM3-55LK standalone. I found some info on BattleBorn's website that recommends setting at 14.4v and using 3-stage. However, one of the commenters mentioned that he was seeing the absorption voltage drop below the 13.6v specified...