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That is correct. I have the same 24V GW as yours. P10=2 cannot be changed. I suspect that a 48V model would be factory set to 4 and also not be changeable.

Is the value of P10 on the GW display = 2?

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...

I wrote about this earlier today! link

You meant 20A and 50A, not V. 50A would be 50%, so 41A would be within specs at 41% per battery.

What does the SOK specs say about charge current limits? 82/2=41 would be a 41% charge rate per 100Ah battery.

The Pi is a long DIY story. Fortunately, I have a degree in CS and had a long career in business data processing. I can design and program. Basically it logs data from the AIO and lets me see graphs through a web interface. Don't even think about asking for a copy of it. I run the last test...

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...

Not exactly, however here is a graph depicting the last 6 days in KWhs without power saving mode(PSM). There are no AC draws for the last three days. The red line shows 1KWh because I add a 1 to any GW measured KWhs to account for a DC feeezer for drawing directly from the battery. IOW, 1 +...

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.

Are PMs searchable?

At Sams Club, the label Duracell usually refers to a battery made by Deka-East/Penn, a company that manufactures in the USA. I had one of those from Bass-Pro labeled XPS. That is a good economy priced battery. Look at the top of the battery to confirm the mfgr. There may be a model no. Mine...

A better question is "What are the manufacturer's charging specs for the battery?". I have used AGMs for 12 years. Stop focusing on various charger's specs and post the battery's specs and then myself or others will be able to advise. Just as a guess, you will be using custom. You might be...

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

I don't have an answer for low voltage cutoff. I thought we were discussing what to do if your SCC stops running after a low temp cutoff by the BMS.

Guys. AGM is lead acid . Simply follow the mfgrs charging specs. Post the specs. In general, normal automotive flooded lead acid(FLA) charging specs are fine. AGM do not require higher Volts, but they can accept higher Amps so long as temperature is controlled. Bubbling a FLA is ok but...

Sorry, I have no newer document.

Calculate W/m^2 using 150W and dimensions 38.8*38.8*1.2inch (98.5*98.5*3 cm): 150 / (.985*.985) = 154.6 I have 200W panels measuring 39in^ which converts to .9906m 200 / (.9906*.9906) = 203.8 The 150W is 50W worse per m^2

Yes, it is that simple. For Volts, disconnect the panel's wires and probe the separate outputs. For comarison, do the same with one of the existing panels under the same conditions.

Try 300W solar by disconnecting 1 panel.

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.

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...

There is no 'dry contact signal switch' on my GW, nor is there a program 24.

A newer model Growatt SPF 3000 TL LVM-24P – model# SKSL00.0010700 is not covered in the above linked pdf. The following link discusses the newer model. https://diysolarforum.com/threads/final-answer-on-ac-out-grounding-on-growatt-spf3000tl-lvm-24p.35892/#post-451811 Whenever using AC out...

Likely due to the heater(s). Will mentioned that recently in a video about the SOK heated battery.

@ fat_old_sun I liked your post. Your measurements and stats are fine. What did you expect before you set up the test? Was 5S the most advantageous configuration for MPPT? Would 5P be worse because the VMP could be reduced to 14.25V(16.77 - 15%) as 14.25V would not likely allow any MPPT...

Are you saying that with MPPT your 5 panels in parallel will under perform the PWM? Or, are you simply showing a pathological case where MPPT can be mis-configured to perform worse than PWM?

Like this: This is DIY.

The term equalize, in relation to LA chemistry, has two definitions, desulfate and destratify. Desulfate is charging, the act of un-discharging, which basically changes lead sulphate back into lead oxide. The process takes a long time to complete. The S molecules are returned to the water...

Days of Hot Weather in Windsor The hottest days at Windsor have temperatures peaking in the thirties Celsius. The city averages one day a summer when the thermometer climbs above 35 °C (95 °F). The thirty-degree weather can show up here anytime from April to October. How about "crack a window...

Each battery will be connected to one of the busbar junctions resulting in all being parallel at the busbar. That accounts for three junctions. The AIO will be connected at the last remaining junction. Let's just say that battery #1 POS will occupy post #1 and in like manner for batteries #2...

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.

Can I combine the functions of a busbar and fuse? It sure would save space in a van by not having so many pigtail wires. I need to parallel three 24V 100Ah batteries to connect to a Growatt 3000W AIO.

Will do! Moved to:

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...