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Looking at two more ~400w bifacial panels for my system. I can get them for $225/ea local-ish, or around half that price if I want to buy 10+ and pay pallet shipping - have a truck and access to a forklift at work. Has it been profitable for anyone to buy extra panels and resell locally?

Goal of this system is backup power for essential household systems, and a family member's medical device, during our frequent grid outages. It was an excuse to explore an interest in solar power and has also become a fun hobby. Some people collect pet rocks and funko pop figures, some of us...

Back story: My system is two strings of 410w bifacial panels, each string is 2 panels in series, each string(was) feeding it's own LV2424 AIO. I'd planned to tilt the panel strings in opposite directions, hence the two two strings on separate MPPTs. Turns out I wasn't doing that, the panels...

I use NOAA weather. https://forecast.weather.gov Underneath the written forecast area, there's a link to hourly forecast. Inside the hourly weather forecast is a set of charts, one of which is % sky coverage. Been using this to predict how much solar I'll be able to harvest, and whether...

Late at night, household power usage is low enough that power saving mode will activate. This rewards us with a symphony of relays clicking and alarms beeping, as the battery backups on the computers freak out and cycle continuously, and also messes with the electronic controls in the freezer...

Not seeing much discussion about this when searching, but it seems like an obvious charger solution - readily available and inexpensive. An example below, although these kinds of power supplies are ubiquitous and made by lots of folks. This one has adjustable voltage from 25.65-29.7v. Note...

Subject pretty well sums up the question, but here's the long version. I have two LV2424's set up for split phase(or two phase, as the manual calls it) operation, so I have two 120v legs, and those two legs together give 240v. I'd like to take advantage of the built-in charger to charge from a...

Didn't find this info anywhere in the manual or on the forum, so I reached out to MPP directly, and am posting their response for others to find. Official LV2424 surge rating is 2x normal output for 5 seconds. The customer service person who emailed me back stressed that this was done in a...

The vent fans on my solar enclosure are running a lot, drawing a lot of power from my small and limited system, and I'm trying to mitigate that. My thoughts are below, and any of these may solve my issue, but please offer suggestions. 1. What temp do you folks feel comfy running your LV2424s...

Very new at this, but already several things on my side. 1. 48v, not 24v. Lower cost, higher capability, better expandability, more future-proof. Unless you're a vanlifer and need easy 12v interface, pretty much everyone should go to 48v. 2. Skip the all-in-ones, do individual components. Not...

How do you folks with hard water clean your solar panels? Between pollen, ash from field burning, and combine dust, cleaning the panels can give nearly 10% increase in output after only a couple days. The issue is that my well water is pretty crunchy, and leaving hard water deposits on the...

What kind of fire extinguisher do you have mounted near your systems? I've had zero issues, nor reason to think there will be an issue, but this is the kind of thing you have to set up before there's a problem. Probably going to go with a basic 5lb or 10lb BC extinguisher. I know Halon or CO2...

TL;DR version: I have no local source for a Grundfos CU-301 controller. Do you guys keep a spare on hand, or think doing so is a good idea? Longer version: Pump and controller were here when I bought the house, a happy accident for running from solar power, and has run flawlessly for the 7...

I'm about to finish my non-grid-connected solar build. 1.6kw solar 13kwh storage 4.8kw inverters, 240v capable My house is on grid and will be staying on grid. This is a separate trailer mounted off-grid system, built to keep necessities running during outages. However, it'll be generating...

What are you all using for PV disconnect? I'm looking for a 2 pole 20a 150vdc breaker, but after days searching the forum and online, I'm only finding no-name brands that I have no interest in using. I'd consider a no-name brand if there's one that's well tested and well regarded here on the...

I'm setting up an 8S pack of Eve cells with M8 welded studs, and the studs are too short. In the middle of the pack, where the bus bars and BMS leads connect, it's fine, though not ideal. At the ends, where the thicker cable lug connects at each end of the battery, it's flatly unacceptable...

I'm top balancing my 280ah lifepo4 pack, and on a whim, thought to check the amperage between cells. Starting at the wire from the power supply and moving down the line, it was easy to see what cells were soaking up amps, and where the amperage dropped to essentially zero. Current between cells...

Building my first system, a solar trailer. I'm using 4x 410w bifacial panels, and am located at almost exactly 45deg latitude here in the pacific northwest of the USA. Would it be worth building adjustable tilt into the solar array? I had planned to just mount the panels on a 45 deg angle to...

8x 280ah cells, delivered today and initial results are very promising. Not swollen, well within storage voltage range, and voltages are quite even. Threading on terminals is trash, as expected, and I'll be using studs. I wouldn't call them unused, they do look like something was clamped to the...

I'm building my first system, waiting for my 280ah lifepo4's to arrive, and everything else is here. While waiting, I have my panels stacked on a utility trailer in my yard, in full sun, without being hooked up to anything. My understanding is that this is fine, as that's what a charge...