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I dropped the panels. The rack's leading crossbar is now the leading edge with the panel directly behind. Plus, round is a better leading edge than the flat edge of the panel. What I did notice right away was a dramatic reduction in noise during a test drive at various speeds. I read that as...

This topic has prompted me to consider reducing the frontal area of the solar on my van. I can hang the unistrut under the crossbar. Then move the panel forward up against the crossbar. The result should be about 1/2 the current frontal area. Comments?

Is anyone interested in data extraction from a Growatt spf3000tl 24? I am using an RPi 3 B with the USB cable that came with the GW to produce simple graphs and charts. No proprietary software. All free and open source software from github or written myself.

I can assure you that I would not configure my panels in 3S. Those panel's VOC is above 65V and three in series would equal 195V which would then exceed the GW's 145VOC limit. Poof! I think I cannot offer anything else unless you provide your panel's VOC, VMP, and IMP.

I lost a panel on the Interstate due to a loose bolt on a clamp. That is why I am installing cone nuts exclusively, without any clamping type holders. I cannot see any way a cone nut can let go. HTH; John

With up to 100ft of 8Ga wire on the solar side of the controller, you can sustain a 10% drop from 42.8 to to 38.52V and still have all the Volts needed to charge a 24V battery. On the battery of the controller, you want to keep the loss lower than 3%. Keep that length as short as practical...

The lengths of the round trips matter, not the length of individual segments of circuit. E.g, a parallel circuit with 2ft NEG and 1ft POS can be matched with another with both POS and NEG of 1.5ft. Both paths equal 3ft.

1. Swap the cables to see if the problem persists or, follows the cables. If the problem persists, the cables are not the cause. 2. Ensure that the batteries are fully charged by charging each one separately, not in parallel. Reconnect in parallel. If the problem returns, it was always the...

Those are a good value. They are made by Deka/East-Penn in the USA. I had a rebadged Deka from Bass-Pro for about 8 years. It was my first AGM and I learned a lot. It is true that a well-cared-for and quality FLA will last longer. OTOH, it is easier to make a fatal mistake. You might even...

I also use a spare 15A MPPT controller to charge a 12V from a 24V battery. With MPPT, it is Watts in = Watts out. 24V * 7.5A = 12V * 15A.

@ronm69 My TT is 17ft. Last June&July, I made a round trip from Oklahoma City to the SW Florida Coast near Punta Gorda. About half of that was dry-camping on solar, battery, and genny. There was a hurricane that hindered solar for a while. I had a six year old 24V 4800Wh AGM battery bank with...

I am in the same situation. In November 2021, I installed a 100Ah kit from batteryhookup. My trailer has an MMS 1012, 1000W/50A with the same 14.5/13.5 Volt charger settings. Solar has always the primary charging source and the MMS was mainly a Bulk charge source. I also have the remote...

No. Your best solution is 3P, and this will require the fewest extras. Connect with a 3-to-1 Y MC4 connector. Add the fuses as spec'ed by your panels, one for each POS input to the Y. If you have 10GA from the Y to the controller, you will likely exceed the 30A rating. You will want to...

Those would look funny on my vehicle.

Apparently, my model is the anomaly. However, It does work out well for my mobile system. In addition, everything worked fine until when the HVAC gas furnace in the house would not run without a ground during a winter power outage. I added an NGB plug into the AC out which corrected the problem.

Look at my avatar. All DIY. I am running a 5120Wh, 200Ah 24V AIO system with a 3000W Growatt AIO, in the van with 981W solar on the van roof. I have a 30A RV socket in the rear where I plug in my 30A trailer. I set this up so I could travel freely and enjoy A/C overnight. It works...

I have Version 3.0 of this Growatt 3K. I don't believe it charges my AGMs per the mfgr specs. My AGM battery charge/float Voltage specs are: charge : 14.4 - 15.0, @ 2 in series that is 28.8 - 30 float : 13.5 - 13.8 @ 2 in series that is 27 - 27.6 There are five settings for program...

Bifacial panels can benefit from a ground mount. They can collect something from the back of the panel. Otherwise, fitting panels on a roof may be more about fitting and getting all the the Watts you need.

I am in OKC. While on a trip to Florida, I arranged for an 8:00AM 'local pickup' at Signature Solar. I spent the night before on their lot and installed a panel right there when they opened and then continued my trip. I would not suggest just driving over there to shop but instead call and...

Here are the results of my first day of LFP+AGM. For over a month, I have been charging the chassis 55Ah Optima AGM battery in the van from a 140W panel and through an MPPT SCC . I log stats at 5 min intervals. There was a pattern of morning Volts being around 12.6V just before sun-up. Also...

The Growatt is V 3.0. It was delivered in mid June 2021 from vendor watts24/7. This morning I decided to try out the power saving mode by setting program 4 to SEN. I need this to work because I have discovered that the inverter requires a 3A charge rate to break even and hold the battery...

It depends. Here is what I know about my model SKSL00 0010700. I learned this while trying to power an AC device that requires a ground. The Growatt's AC out is NEVER grounded. Not with grid, generator or inverter(battery). I ask that any comments please include the model # related to the...

You will be able to tighten enough to secure the panels. Fasten these to your panels using the existing mounting holes on the bottom of the panels. Don' tighten them yet. The bolts will go downward through the holes. The plastic of side of the nut will face the bottom of the panel...

I have two suggestions for INVERTER based 120ACV appliances which I have run on a 1000W inverter for years. On this type of appliance, the power level controls the Wattage draw. In contrast, a regular 1800W capable appliance switches full power on/off. In the on/off case, an 1800W appliance...

If there is a 6A parasitic draw, then ABS would continue indefinitely because charge Amps would never fall below 5A. An ABS timer is a good thing.

So then posters that use PMs excessively to discuss topics must have a treasure trove of material they can draw from to copy and paste into public postings, yes? I personally abhor PMs and if I get one, I will ask permission to reply publicly so all can enjoy.

Add the LFP in parallel with the AGMs. That will solve problems with all the reasons LFP has to disconnect. E.g., I have an SCC that shuts off and will not reconnect without a battery. When the LFP shut down due to Low Temps, the AGMs kept the SCC, and the loads, going for three days running...

Sweet!

Thanks for the new 24V video and 24V link : $642 24V Beginner Friendly DIY Solar System: Perfect for #vanlife Large Van/RV or small Cabin 24v System

Yes. Your 2S2P array will be 74.4VMP which is inside the 30-115 range.