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The bubbling is normal electrolysis; the breaking down of H2O into H and O gas. It is caused by high Voltage. The purpose is to stir the electrolyte. 15minutes is plenty of time. Done too long, it is a bad thing, leading to loss of water as the H and O gas escapes. H and O gas mixed are...

This info may help with aging the model numbers. I got my Growatt in May 2021 after waiting two months. Yes, I saw yours and others posts and that is when I learned I may have a newer Growatt that what was being discussed. I don't have 'program 24' on the LCD Display, or an external relay...

I appreciate the info. I did, in fact, have some kind of ground issue with the circuit to the chassis battery. I was getting about 6VDC where I wanted 13.1V. I am using an MPPT SCC to step down from the 24V bank to the 12V chassis. The neg wire from the SCC to the frame was not making good...

That I can get the AGM floated overnight for free? I did measure the charge current once about 2 hours after they were joined. Each battery has a separate post on the bus bars. I did not parallel at the battery. My clamp on read 0.66A to the AGM and 4.10A to the LFP. That agreed with the...

One of the design principles is that the inverter and batteries are close together. Can you post your floor plan. I have been able to relocate batteries from the tongue of 12ft pop-up, a 14ft TT, and my current 17ft TT. I believe you can do it too.

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?

I don't see any reason to limit the packs to 100AH. Two 120A Overkill 120A BMS's could deliver 240A with 280AH banks, or any banks rated at 120A discharge or more.

After looking at the charging graphs, I have gotten cold feet on this charger. My understanding of LFP charging does not include an ABS stage, but only Bulk and Float. LFP has two stages CC and CV. CC is similar to Bulk except that when the CC Voltage set-point is reached, LFP is fully...

OK, I just measured -1.2A, with the combined bank at 13.28V at 20:40 CDST. I would say the AGM is wanting to decrease. I will measure Amps again right after sunrise.

Will do! Moved to:

Good question. AFAIK, there is no published spec. I do have my GW available for a test. I will leave my system on power save for a few days with only solar for a charging source, and no AC or DC draws. Perhaps the logs will reveal daily solar charge Whs into the battery. Would that be the...

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.

If you are good with this, then I will understand.

Horsefly; I see you agree with what I posted. I have been using AGM since 2009. Poorly at first, but now I can handle them well. I am going to proceed with joining my LFP and AGM. Per Eaton, their AGM can be floated 'if you are not in a hurry'. Well, that is the use case I am trying out...

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...

That is way too high. In practice, I lean toward starting charging under 12.4 hot and 12.2 cold. Did you know that the cranking Amps rating involves determining how many Amps can be drawn for 15 seconds that drops the Voltage to 9.6V? CCA is rated at 32F. I have an inverter that will run...

Plus, PF will be important when using a genny if it means more output power with less fuel.

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...

The discussion has drifted from its roots.

Yes, I agree. And that would be a good charger for me,....but I need a control over input Watts/outputAmps. When camping, the real kind away from a power pole, I use a Yahama 2000is inverter genny for charging. The big issue is altitude. When at 10,000ft, it only produces up to 1000W. I...

Sorry, I have no newer document.

I My manual says Version 3.0 on the cover, the link is to 1.0. HTH; John

I need y'all to review my plan to charge my 24V house bank for $18USD. Dasiter 600W High Power DC to DC Boost Converter DC 12-60V to 12-80V Boost Module Board Step-up Transformer I have been pulling a travel trailer with a van. It is a 30A trailer. One way to describe my rig is a split 'B'...

Okay, no one has yet offered any advice. I will go ahead and ignore this concern and place the 100Ah AGM in parallel with the 100Ah LFP in the TT. Now, I have seen where some have reported walk-down of the AGM SOC% caused by insufficient and non-frequent return to full charge. The Lifeline...

Add lead in parallel. I know this is an unpopular idea, but the lead will keep the SCC alive overnight until solar comes back. Your lead will need to be enough for one night.

If possible, I would like to request a test for the NPB. When putting the RV into storage with power available, could I choose an SOC% to be maintained by adjusting the CV?

Agree. With my three different towables, I have never used any WDH or sway controls. Just drop the tongue on the ball. Is there any other safety issue?

I understand completely now.

Well, yes, panels run at normal operating conditions(NOC) which are less that STC. I figure with that and with no tilt, we are fortunate to get 50% of STC Wattage as input. However, there could be that unique moment we are above 10000ft(cool temps) at the equator on Jun or Dec 21stat solar...

I don't understand the 10% Bulk phrase. The Growatt is my second Inverter/Charger that calculates ABS time. I believe that is a good way to do ABS. I believe that there needs to be some time limit on ABS. Otherwise the ABS Voltage could continue indefinitely. Wouldn't that be a bad thing? If...