6V deep cycle batteries

[Slownsy]

Have had som very overcast weather the last 4 days, batteries down to 82% in morning back to 95% afternoon, how long can this be don before a 100% recharge becomes essential.
Frank

[red31]

MEXICOWANDERER wrote:

Get the parallel here?

No, I don't see how your oven example comes close to the proposed simple question that obviously has a complex answer!

I also do not believe it has anything to do with parallel vs series,, pwm vs mppt!!!

How does the OPs system specs affect the answer?

How many 95-80 cycles can the OP 'do' before the chemical reaction is irreversible or he's force to replace his generator? I'm not sure it is quantifiable easily. Let me suggest 9.846372 days more or less :B ya does what ya gotta does.

Bogarts finish volt/current come from the battery maker.

[lawrosa]

Almot wrote:
Lawrosa - inverter fridges draw "less" energy daily than on-off machines. But 12 cu.ft (or is it 13?) is a lot to cool, you can't trick physics.

Though not important in this particular situation - low overcast - but his 600W solar is not 60A system. Bogart PWM add-on to Trimetric monitor is 30A max. It does have limiting circuitry that allows over-panelling up to 600W without going up in smoke - as I recall - but it can't do more than 30A.

Ahhh pwm... Gotcha... And ahhh... mexican wanderer with the parallel thing... yes....

Some series panels and an mppt is in order I would assume.

[Almot]

Lawrosa - inverter fridges draw "less" energy daily than on-off machines. But 12 cu.ft (or is it 13?) is a lot to cool, you can't trick physics.

Though not important in this particular situation - low overcast - but his 600W solar is not 60A system. Bogart PWM add-on to Trimetric monitor is 30A max. It does have limiting circuitry that allows over-panelling up to 600W without going up in smoke - as I recall - but it can't do more than 30A.

[lawrosa]

Slownsy wrote:
TM-2030 Trimetric absorb 14.5 Amp set pt 2% 520A. time 4h high V15.9. float V13.5 Overcharge 10%. Finish A 3.5%
Solar 600W I am running a domestic 314l Samsung inverter fridge. Overnight all op usage around 14-16% 80A. As my generator was stolen I just wanted to check how long without damaging batteries. Back on a powered site for now. Thanks all.
Frank.

So on bogarts site they have a battery charge parameter calculator.

http://www.bogartengineering.com/support/charging-parameters.html

Ive input all different batteries and ah's and got some stupid 14.3 charging voltages of absorption for parameters..

Your amps set point 2% of your 520ah batts = 10.4a

Should probably be what the batt manufacturer suggests or at least 14.8 or so right?

Guess it dont matter if a cloudy day as it can never reach set point? Even turning up the voltage on the controller?

Note on P7: This selects which of two standards is used for the TM-2030 to register when the battery is "charged". L3 or L4
If L3 is chosen: this is the "easier" condition: It will cause the green "charging" light to flash (indicating "meets charging parameters") when the voltage exceeds P1 value, and simultaneously the charging amps is less than P2 % times P3. The green light will stop flashing as soon as this standard is not being met. In this case the green flashing light means "batteries presently meet charged criteria."
If L4 is chosen: a higher standard is required to be "charged." First the L3 standard must be met. Then next the overcharge percentage in P20 must also be met before the green "charging" light will flash. It will then continue to flash until the "Percent Full" display goes to 97% or lower. In this case the green flashing light means "batteries were charged and they haven’t yet discharged below 98% full."

15.9 is kinda high no?

[lawrosa]

12 cu.ft compressor fridge wrote:

Its some type of inverter fridge...Im not familiar.. Looked up specs but says nothing about power consumtion

[Almot]

MEXICOWANDERER wrote:

It's a SMART oven. It has no adjustment. It knows how *IT* wants your ravioli to be prepared. There's no way in the world you would EVER GET burned ravioli, right?

This is how stupid smart battery charging is...

I don't care how "it" wants my ravioli, it's me who will be eating them. If controller has no adjustments, it sucks.

The OP has got - as it turned out after 2 or 3 pages - a different kind of "smart" system, where you adjust the parameters and let it run on autopilot. Ops, - heavy headwind and opposing current kicks in. Autopilot is keeping same straight course, because it doesn't know any better, and the captain thinks that autopilot is doing the thinking :). Eventually autopilot could've managed, with more power/sails or less load in the boat, but what's the use if to change any of this, you need to make it to the harbor first.

12 cu.ft compressor fridge + some solar = generator dependency. He was lucky it was overcast, not rain. As much as I hate performance of propane fridge, 490W solar keeps me afloat, literally and metaphorically, in any kind of weather.

[lawrosa]

MEXICOWANDERER wrote:
When you know your ravioli, you know how long to keep it in the oven and at what temperature, to make sure it comes out just right.

It's a SMART oven. It has no adjustment. It knows how *IT* wants your ravioli to be prepared. There's no way in the world you would EVER GET burned ravioli, right?

This is how stupid smart battery charging is...

Get the parallel here?

I dont get it... But It would seem your saying something... Can you talk in proper laymens terms.

**** and to the other poster. No I dont know the bogart system.

[MrWizard]

when i did a schedule of partial charging
i did a full all day recharge (1) day every week
no more than 6 days max partial not full charging,

i prefer a full charge everyday, IF possible

[grizzzman]

lawrosa wrote:

Slownsy wrote:
TM-2030 Trimetric absorb 14.5 Amp set pt 2% 520A. time 4h high V15.9. float V13.5 Overcharge 10%. Finish A 3.5%
Solar 600W I am running a domestic 314l Samsung inverter fridge. Overnight all op usage around 14-16% 80A. As my generator was stolen I just wanted to check how long without damaging batteries. Back on a powered site for now. Thanks all.
Frank.

Cant make heads or tails of your post.

1. How many ah,s are the batts?
2. What controller do you have?
3. Bulk V? Absorp V? Flaot V?

All controllers have a trigger point.

Bulk should be like 14.8. Will try to put in all amps controller has.

Once 14.8 is reached, or usually 4 hrs it will switch to absorb. Amps will then taper.

Absorp is time based or amp based on some controllers.

Usually I believe float gets triggered at about 17 amps from absorb.

I dont thing boondocking and using your batts you dont have enough daylight to fully charge.

Depends what your doing. And what amps are going in during the day.

Sometimes you need to trick the controller with a load to get back into bulk . Even if it gets to absorb quickly to 14.8 it will go back into a time based absorp.

I dont think you can really overcharge a battery when boondocking. Especially with a reefer running on electric..

You need to watch the amps going in and make a judgement call.

Im not familiar with that samsung inverter fridge..Whats the watt use?

Your solar 600w/12 = 60amps

If you understood the Bogart system it would make more sense. He gave lots of the info on how his system worked.

[MEXICOWANDERER]

When you know your ravioli, you know how long to keep it in the oven and at what temperature, to make sure it comes out just right.

It's a SMART oven. It has no adjustment. It knows how *IT* wants your ravioli to be prepared. There's no way in the world you would EVER GET burned ravioli, right?

This is how stupid smart battery charging is...

Get the parallel here?

[lawrosa]

Slownsy wrote:
TM-2030 Trimetric absorb 14.5 Amp set pt 2% 520A. time 4h high V15.9. float V13.5 Overcharge 10%. Finish A 3.5%
Solar 600W I am running a domestic 314l Samsung inverter fridge. Overnight all op usage around 14-16% 80A. As my generator was stolen I just wanted to check how long without damaging batteries. Back on a powered site for now. Thanks all.
Frank.

Cant make heads or tails of your post.

1. How many ah,s are the batts?
2. What controller do you have?
3. Bulk V? Absorp V? Flaot V?

All controllers have a trigger point.

Bulk should be like 14.8. Will try to put in all amps controller has.

Once 14.8 is reached, or usually 4 hrs it will switch to absorb. Amps will then taper.

Absorp is time based or amp based on some controllers.

Usually I believe float gets triggered at about 17 amps from absorb.

I dont thing boondocking and using your batts you dont have enough daylight to fully charge.

Depends what your doing. And what amps are going in during the day.

Sometimes you need to trick the controller with a load to get back into bulk . Even if it gets to absorb quickly to 14.8 it will go back into a time based absorp.

I dont think you can really overcharge a battery when boondocking. Especially with a reefer running on electric..

You need to watch the amps going in and make a judgement call.

Im not familiar with that samsung inverter fridge..Whats the watt use?

Your solar 600w/12 = 60amps

[Slownsy]

TM-2030 Trimetric absorb 14.5 Amp set pt 2% 520A. time 4h high V15.9. float V13.5 Overcharge 10%. Finish A 3.5%
Solar 600W I am running a domestic 314l Samsung inverter fridge. Overnight all op usage around 14-16% 80A. As my generator was stolen I just wanted to check how long without damaging batteries. Back on a powered site for now. Thanks all.
Frank.

[Almot]

MEXICOWANDERER wrote:

No timer dial. Press button. It's a s-m-a-r-t oven. Guaranteed to not burn food.

DING!

Enjoy popsicle ravioli.

When you know your ravioli, you know how long to keep it in the oven and at what temperature, to make sure it comes out just right.

Testing can be done retrospectively, early in the morning.

[MEXICOWANDERER]

Stick frozen ravioli in convection oven.

Set temperature to 325

No timer dial. Press button. It's a s-m-a-r-t oven. Guaranteed to not burn food.

DING!

Enjoy popsicle ravioli.

[Almot]

lawrosa wrote:

I would leave in in absorb mode all day if I could. But I have the kick back into bulk ar a high 13.2 anyway..

Float I have 13.6...Ill rarely see float while boondocking i'm sure.

Different energy use patterns, different controllers.

Not enough info from the OP but it sounds like his energy use is low. This is familiar to me. When controller terminates the Absorption, based on current or timer - late morning or early afternoon when it's sunny - it stays in Float all day. Minor draws would increase the current in, but it stays in Float because there is enough solar output to feed the loads and maintain V float.

When it's low overcast, it starts again bulk/MPPT every time when voltage drops below Absorb or Float - and it does drop, if there isn't enough output. I believe most controllers work like this.