Most reacted posts

Pic of the BMS: This is sold as a kit with 4 ea cell packs. It should be designed to work, or it is not a kit. Of course, it may not be idiot proof. I will ask batteryhookup for installation instructions.

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

How about a VSR in-line with the 7-pin? When either side is charging, the connection is on, otherwise if neither side is charging the connection is off. VSRs

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...

I did check again at 6:00AM. I read -1.2A at the LFP neg cable. Given the 10 hours since the reading last night results in a total of -12Ahs. Then I realized I had left a dome light on last night! When I turned it off, the reading was -0.40. Let's say that was the true discharge from the...

You QUOTED me as posting "because it has the word induction in the name. It is not a resistive load." What I posted was "I guess because it has the word induction in the name. It is not a resistive load.". Italics identify the missing passage. I do not appreciate being misquoted. You...

We agree that batteries don't have feelings. At another end of the spectrum of goals for the battery is "I want power when I need it.". Beauty is in the eye of the beholder.

Agree. The simplicity of 'hook three wires up and go' is seductive.

Like this: This is DIY.

E.g., I have pushed my 410w-silver-mono-72-split-cell-et-solar-panel from SignatureSolar to 459W. That is 87+%. I would like to move this panel from my van to my TT. I want to max the Watts for my van roof. Will's test showed that the $50, 250W santan panels yielded 92%. Three of these...

And I will give your opinion all the attention it deserves!

Give this a think. Suppose you install an 82" wide wedge with the leading edge having a zero height forward. Now, extend the length of the back facing edge towards the back at a rise of 2" per 40". If that is a zero height leading edge, then does if follow that the trailing height can be...

I want to get three of these link for input to a Growatt 3000 with a 145VOC limit. I plan to wire in series at 112.2V( 3 * 37.4VOC). Does anyone know what Output Watts% I can expect?

DCC = ????

Part deux: As to the bolded above, you have the temperature issue backwards and wrong. The issue is too high VOC, not power. A panel's VOC is reduced as it heats. You may have already passed the critical point for the VOC issue. I can only conclude the you did not exceed the VOC limit of the...

Yes, what you are seeing is predictable. Unbalanced Charging: It Is a Matter of Resistance This works with banks of 2,4,8,16.... batteries, not 6. One way of wiring 6 batteries is to use a pos and neg power post or busbar. All the battery neg posts are wired to the neg post with EQUAL...

I wrote about this earlier today! link

The correct document is V0.12 dtd 2020-06-16. I got the file from Growatt. Growatt OffGrid SPF Modbus RS485&RS232 RTU Protocol V0.12 20200724A.pdf

I am running 400W(2x200W in series ) at 45V through a Morningstar 15A MPPT controller. That is 100% over paneled. Their documentation says the controller will protect itself and limit output current to 15A no matter how many Watts are input at under 60V. I know do give up Amps when I hit...

I found a graph on page 43 in my SPF 3000TL LVM-24P 3.0 manual that agrees with your pdf and the 3-stage NPB. There is a formula for calculating the ABS time in Utility Charging Mode. Time in ABS can vary between 10min and 8hrs. There is no setting for ABS time. I can't tell if this graph...

If you are trying to protect the alternator, why would anyone want to be using the MPPT's current boosting feature? I thought the purpose of using an MPPT was to use the charging current limiting. Set the MPPT charging Volts to 13.3 - 13.5 and stay away from the upper knee.

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...

Typo alert! shouldn't that be 0C and 45C?

You probably think that means that there are separate adjustments. I have read that there is one adjustment on PMs that adjusts both voltages at the same time. If true, their statement is true, but misleading. Plus if done knowingly borders on fraud.

The batteryhookup 12V 100Ah kit is now working and is in parallel with the 100Ah AGM. I wanted to thank everyone for the helpful advice. I believe the reason I had a problem was that I was trying to use a standard 50/10/2A car charger during the bench testing. I believe the charger did not...

I get it, really. You are preaching to the choir. I have been on AGMs since 2009.