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One day and one year. Time to move on. Take care, Steve

Most (if not all) of the Growatt series do not have typical AC charging modes when in SOL or SBU modes. Their AC chargers do not use the Absorption and float values. The AC chargers come at a set low voltage and then turn off immediately after attaining the set high voltage. See settings 12 &...

3.4A @ 120V = 408W It probably uses less than that, but it's good to be conservative. Given the 6 hour run time of the Bluetti, this isn't too far off the mark. The Growatt will burn another 50W. 458W/0.85 = 539W (account for inverter inefficiency) 24hr * 539W = 12,936Wh - daily energy...

With 4 strings, you should technically have a fuse or breaker on each string equal to the "Max fuse" rating on the panel sticker (probably 10A). Easiest would be to use a MC4 fuse in each string. Assuming 3S4P, that's going to be about 24A. You want a 1.25X safety factor, so 1.25 * 24A = 30A...

The 50 and 45 numbers are the charge current, so the 100/50 has greater charging capability of a 24V battery than the 150/45, BUT the 150/45 can charge 48V and host a notably larger array if you want to over-panel it. Given that you've pretty much maxed out your roof space, I'd stick with the...

Not sure what you mean by facing East/West. My door opens to the west. Since we're North of 23.5° Latitude, sun will shine on the south face, and it will get hot as crap. It's not just about the solar heating, it's about the horrific insulating properties of the steel walls. An A/C unit can't...

Yes, one MPPT SCC. 1200/24 = 50A. Will recommends several here: https://www.mobile-solarpower.com/solar-charge-controllers.html I only recommend Victron, but that's because I'm a snob. :) A Victron 100/50 would work nicely, but you would need to go 3S4P since 88V is a little too close to 100V.

3 groups of 4 panels wired in series, then those 3 groups are put in parallel with each other, so your Vmp is 4X one panel, and your Imp is 3X one panel.

I just realized you already posted a picture of the roof layout... derp. I only see 10, but I think you can get them on there. Your protrusions aren't too bad, and shouldn't impact your output for the majority of the day. 4S3P would work as well.

Bluetti would have the same issues. Their charge controllers are fairly limited. It's about roof protrusions. If your roof protrusions will shade your panels, you need to plan for it. With 24V, you'll need 2S for sure - 3S will probably perform a little better, so 3S4P is likely a good...

Welcome to the forum. Unfortunately 4S Li-ion of 3.7V nominal cells is not horribly useful for 12V. They can operate from 12-16.8V, and many inverters won't tolerate voltages over 15-16V, so much capacity is lost. The seller wants to sell you cells. Sounds like a lot of complexity and work...

Welcome to the forum. First, you need to insulate the container. No way around that. I have a 40' container @ 6700 ft here in the AZ high dessert, and the wall on the sun-facing side routinely exceeds 140°F. If you insulate with something around R9+, you should be able to get by with a 1 ton...

Welcome to the forum. Your solar panels determine how much you can use daily. Your battery determines how long you can run without charging. If you want to run on just battery without any solar charging for two weeks, you need 7 of those batteries (7 * 2 days = 14 days). If you want to run...

You literally quoted him in the post above: "I said you won't find hard working competent fat people. You can call it a label... some of us call it reality." Don't mistake it for defensiveness. I simply wanted to provide a different perspective to this "reality" and provide hope for my fellow...

Welcome to the forum. There's fundamentally no difference between a "dumb" AGM battery that can't communicate with an inverter and a LFP battery that can't talk to the inverter either. The only way they communicate is via their voltage. 16 cell LFP (RB48v300) and 48V AGM have almost perfectly...

Just a quick note about fatties... I'm 90# overweight. I have an Aerospace Engineering degree. I have a job as an engineer in aviation. I have a second job that I do for fun that earns me a very respectable side income, and I'm the top post whore on a solar forum. I just wanted to give the...

I look more like the fan. I felt like @Will Prowse was talking directly to me while staring into my soul in his "morning rant" video... :)

Take 2 panels, connect (+) from one to (-) of other. Repeat a total of 4 times, so you have 4 sets of two panels in series. Take the 4 (-) wires and connect to the 4-1 parallel connector. Take the 4 (+) wires and connect to the 4-1 parallel connector. You now have 8 panels wired in 2S4P.

Welcome to the forum. Typical passive BMS balancers may only provide 30-70mA of balance current. 100mA would probably work well and 200mA might be even better given the atypical cell count. The need for balancing depends 1000% on the quality of your cells. There can be wild variations within...

Will shows both 2-1 and 4-1 on this page: https://www.mobile-solarpower.com/wire-and-connectors.html It would seem you just need a single set of 4-1.

Bro... you so skinny.

No. A panel's nominal voltage is intended to describe the battery voltage for which they are best suited to charge. For that panel, when you draw 7.5A in perfect solar conditions, it drops to 30V. Trying to eliminate regulated voltage between the panel and the fan is going to be a headache. an...

Do you have evidence to support this claim?

SCC are rated by CHARGING CURRENT and need to be: Array Watts/battery voltage = SCC amps e.g., 1200W/12V = 100A Going a little low is fine, even 10-20%. It's not based on the # of panels, it's based on the charging current. That same controller could handle 2X the array power on a 24V...

No. It's a 60 cell panel. Vmp of a panel is 1.5X nominal, so a 24V panel will have a Vmp of around 36V. Yours is around 30V, so it's a 20V panel. 60 cell panels are most common in grid-tie systems with high series voltage.

Yep. 2S5P or you run the risk of killing the charge controller.

Welcome to the forum. You need to establish the energy usage of the unit, not just its power consumption. If it used 85W all the time, it would use more energy than a full size residential fridge. Get the fridge, load it as you would, and monitor it's energy usage with a kill-a-watt meter...

Welcome to the forum. On an MPPT controller, paralleling a 18Vmp panel in with that one will likely see the total array wattage reduced by about 10%. If the Zamp is a PWM controller, it doesn't matter as the panels are forced to operate at battery voltage resulting in a much larger performance...

Those 18V panels are actually 42V in series. You have to look at Voc. You've already posted on "splitting the voltage": https://diysolarforum.com/threads/splitting-one-panel-to-two-inputs-of-a-micro-inverter-what-happens.24907/#post-293593

Welcome to the forum. Probably not even 3 unless you're in a climate that NEVER drops below 50°F or so, and 3S wouldn't work well for your 10 panels. You don't just need to be below 150V, you need to have sufficient wiggle room for cold temperature voltage spikes. Assuming these are 72 cell...

LOL... You were inside of two miles from me. We're just north of Brown between Higley and Greenfield. I use that carwash and visit that O'Reilly regularly... :)

Okay... strange question... Was this taken on Brown Road by O'Reilly in Mesa (just West of Recker)?

Hmmm... VRM won't update it. Still at 3.05.

7/6 release for 250/100 is 3.06. I'm still on 3.05 since I don't connect direct with Victron Connect. I'll update through VRM and report.

Isn't the Phocos just another Voltronics unit (MPP Solar) with a reputable company name on it?