Is my system setup in a good way?

[Mike90250]

> But isnt it inverter current drawing from the battery is a negligeble factor?

Not at all. there are many small inverters with higher standby losses, than I have with a large, well engineered inverter. The fine print giveith and takeith away.

[SunEagle]

Hi Sun Eagle,

Thanks a lot for your feedback, appreciate it so much mate.

Would it be possible that the 1500W inverter is discharging or drawing too much current from my battery thus draining it overnight (even on power-saver mode) ?

But isnt it inverter current drawing from the battery is a negligeble factor?

Would it help if i use a smaller size inverter? (But i keep other variable constant such as maintaining the same battery and MPPT CC)

Thanks again.

Some inverters are very efficient and some are not. Go check the specifications. It may show what the "no load" (nothing plug in) watt usage is in a watt value or % of inverter wattage.

As an example if it state 2% then that 1500w x 2% = 30watts. The bigger the inverter the higher the losses and greater chance of draining the battery quicker.

[Sun_Bob]

Sun_Bob

Well were to begin.

Your battery is too small, your panel wattage is too little, your invertor is too big.

Now first you determine what you will be using in watt hours per day.

If it is 200 watts from 6 pm to 12 midnight then it will be 6 hours or 6 x 200 watts = 1200 watt hours.

Your battery will need to be sized for about 4 times that or around 4800 watt hours. At 12volts that comes to about 4800wh / 12 = 400Ah. So that would be either 2 x 6v 400Ah or 3 x 4v 400Ah batteries wired in series. Never wired batteries in parallel. That causes unequal charging and discharging which leads to shortened battery life.

For a 400Ah battery system you will need about 1/10 of that for charging or ~ 40Amps. That calculates to (40Amps x 12volt = 480 watt of solar panels) using a true MPPT CC. Also even though you live in Asia you will never get 9 hours of useful sunlight to charge the battery. Maybe 7 at the equator but never 9.

To keep from wasting that battery you need an inverter that is sized for the battery system. That would be around a 600 watt inverter. If you go bigger you run the chance of over discharging (which I believe you have) your battery.

Hi Sun Eagle,

Thanks a lot for your feedback, appreciate it so much mate.

Would it be possible that the 1500W inverter is discharging or drawing too much current from my battery thus draining it overnight (even on power-saver mode) ?

But isnt it inverter current drawing from the battery is a negligeble factor?

Would it help if i use a smaller size inverter? (But i keep other variable constant such as maintaining the same battery and MPPT CC)

Thanks again.

[Sunking]

It's a VRLA battery for standby according to the label, so it's likely GEL and not AGM.

If it had pry off caps, it could have been a maintenance free flooded. but I think that was not the case.

Nevertheless - it's both dangerous and pointless to cut the top half off a battery case, expose the innards and start adding random mixes of water or mild acid

Kind of my point Mike and I agree. It is clearly labeled VRLA which means it must be either Gel or AGM. Maintenance Free is a Marketing gimmick which has no meaning. The sealed FLA batteries you are referring to were strictly 70/80's Auto and Marine batteries which have no purpose in cycle applications and I do not think they make any more of them as the Auto industry has switched to AGM dual purpose batteries. Those batteries were strictly Automotive industry and called SLA batteries at the time, and only SAE society used the term SLA . They have no other purpose than SLI batteries.

Tytower is preaching dangerous activity and does not know what he is talking about. He does not know the difference between VRLA, Gel, AGM, FLA, SLA, SLI or Deep Cycle. He is a dangerous pretender and should be ignored or better yet banned.

[Mike90250]

It's a VRLA battery for standby according to the label, so it's likely GEL and not AGM.

If it had pry off caps, it could have been a maintenance free flooded. but I think that was not the case.

Nevertheless - it's both dangerous and pointless to cut the top half off a battery case, expose the innards and start adding random mixes of water or mild acid

[SunEagle]

Yes I see that you also "adjust" posts to suit your purposes by leaving some bits in and taking others out. Not a good site to be part of at all

Was that accusation pointed to me or some other person because I don't remember editing anything you posted.

Yes I see that you also "adjust" posts to suit your purposes by leaving some bits in and taking others out. Not a good site to be part of at all

[SunEagle]

Apologize for what? Being right and spotting frauds?

I was being sarcastic since tytower thought you would be apologizing to him.

Yep , Just what I would expect a dealer to say . That white stuff on an AGM is a covering of wool/cotton like material that supposedly holds the electrolyte in place when tipped . It doesn't of course. Scrape that back to see the real glass mat or best cut up the case as I do by taking the top and teminals off in one one inch slice with hydraulic serated jaws and then tip out the cells . Look closely at the various lead sulphates , sulphides and phosphates on the base of the case and separate a plate or two to get a good look at the Glass matt and the sulphation between the dissimilar lead plates . Then you might learn a bit more and graduate to student level in this.

The pictures I gave you are white lead sulphate powder that you can lift out and test . It has expanded out of the plates and forced its way out everywhere. I've told you its not an AGM battery but you assume you know better even though you are in a completely differnt country to me ? C'mon wake up Man.

[Sunking]

You forgot to add not to bother holding his breath waiting for an apology from SK.

Apologize for what? Being right and spotting frauds?

[Sunking]

Like I said Tytower, you do not know much about batteries and proved it with your ignorance. PN and myself have forgotten more about batteries than you will ever know.

[SunEagle]

> Do you see AGM anywhere on the case ? Look it up . Its a sealed Lead Acid Battery excessively sulphated and boiled dry.
> Check before you rant

No rant, just the truth. It is an agm. Charge it right, and you won't sulfate or boil dry, but merely use it until it's normal rated end of life.

> The example is meant to illustrate what happens when people covercharge such batteries .

The solution is to stop doing that. Kind of like the joke about the doctor telling the guy who complains that it hurts when he pees to simply stop doing that.

> That said Remco is a chinese company making a lot of AGM batteries ,in fact most of their range . This one is however not AGM.

Sorry but it is. The specs on the case identify it, without having to specifically spell it out. It is not a gel either. See the white absorbed glass matt between the closely spaced plates? That isn't sulfate, but the mat itself. Kind of shiny though now that you've oversaturated it with water.

> AGM is sulphuric acid impregnated into glass matting to hold it between the plates. It still boils off during overcharge and adding water and a little acid will not harm them further .
> The matting and paste absorbe some of the electrolyte again and often start working again but the sulphation has caused irrepairable damage.

Stop overcharging them. Stop undercharging them. And at this point, cutting the tops off and refilling is NOT what it is designed to do, so stop playing with trash, get a new one, and treat it properly.

The lingo used is to bring a bit of humor to YOUR rant about sealed vrla batteries, countering it by a bit of education on just treating them right, as the specs on most of the casings clearly show.

In the end, I think you are confusing the so-called "maintenance free" sealed FLOODED batteries, with those of an agm. In that case of a sealed MF battery you have 3 choices:

1) Don't buy it in the first place.
2) Wait for the warranty to expire, pop the tops, and refill with distilled water as needed.
3) IMMEDIATELY void the warranty, pop the top, and refill with distilled water as needed.

But don't do this to an agm since it is not worth the trouble. Start over fresh and simply just treat them as designed.

You forgot to add not to bother holding his breath waiting for an apology from SK.

[jflorey2]

See the white stuff? That's the GM part of AGM. It's supposed to be dry.

[PNjunction]

> Do you see AGM anywhere on the case ? Look it up . Its a sealed Lead Acid Battery excessively sulphated and boiled dry.
> Check before you rant

No rant, just the truth. It is an agm. Charge it right, and you won't sulfate or boil dry, but merely use it until it's normal rated end of life.

> The example is meant to illustrate what happens when people covercharge such batteries .

The solution is to stop doing that. Kind of like the joke about the doctor telling the guy who complains that it hurts when he pees to simply stop doing that.

> That said Remco is a chinese company making a lot of AGM batteries ,in fact most of their range . This one is however not AGM.

Sorry but it is. The specs on the case identify it, without having to specifically spell it out. It is not a gel either. See the white absorbed glass matt between the closely spaced plates? That isn't sulfate, but the mat itself. Kind of shiny though now that you've oversaturated it with water.

> AGM is sulphuric acid impregnated into glass matting to hold it between the plates. It still boils off during overcharge and adding water and a little acid will not harm them further .
> The matting and paste absorbe some of the electrolyte again and often start working again but the sulphation has caused irrepairable damage.

Stop overcharging them. Stop undercharging them. And at this point, cutting the tops off and refilling is NOT what it is designed to do, so stop playing with trash, get a new one, and treat it properly.

The lingo used is to bring a bit of humor to YOUR rant about sealed vrla batteries, countering it by a bit of education on just treating them right, as the specs on most of the casings clearly show.

In the end, I think you are confusing the so-called "maintenance free" sealed FLOODED batteries, with those of an agm. In that case of a sealed MF battery you have 3 choices:

1) Don't buy it in the first place.
2) Wait for the warranty to expire, pop the tops, and refill with distilled water as needed.
3) IMMEDIATELY void the warranty, pop the top, and refill with distilled water as needed.

But don't do this to an agm since it is not worth the trouble. Start over fresh and simply just treat them as designed.

You are a very cheeky sod. There is no AGM printed on the battery and I have told you it is not an AGM battery so the discussion with you is pointless. I notice you are quite rude to others on here too . Do you claim this forum as your roost do you?

Thats a shame as you will drive the questions away . I don't ask or answer questions to be abused by fools so you can shove it where the sun don't shine Sunshine!

https://en.wikipedia.org/wiki/VRLA_battery

There are three primary types of VRLA batteries, Sealed VR wet cell[citation needed], AGM and Gel. Gel cells add silica dust to the electrolyte, forming a thick putty-like gel. These are sometimes referred to as "silicone batteries". AGM (absorbed glass mat) batteries feature fiberglass mesh between the battery plates which serves to contain the electrolyte. Both designs offer advantages and disadvantages compared to conventional batteries and sealed VR wet cells, as well as each other.

In both other cases it is a water diluted sulphuric acid based electrolyte.

Lets see if you are as quick to appologise.