AGM Battery Recharge Time - Page 3





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  1. #41
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    Default Re: AGM Battery Recharge Time

    Quote Originally Posted by ekkekan View Post
    These voltages do like right to me after being charged.
    Yes the solenoid system will always charge faster. The last 10% of the charge does indeed takes ages. The high current of the solenoid get the battery to 80% real quick and then I would say the panels/220V can take over when at a destination. Nothing wrong in charging each extra battery on different systems as indicated. It all depends on how long you are travelling. Always start with full batteries from home base.

    Due to AGM charging faster I agree using it on the NL box and charge via solenoid and expect it to be fuller than the Royal that is on the DC to DC.

    I am just giving my opinion and some guys will have the actual experience on the equipment you need answers to.
    Thanks for your opinion. Iím heading off to Moz next week and will be camping for 4 days without AC available, so will put the system to the test. I will probably just fit the AGM to the NL solenoid box and harvest some solar power during the day.

    Iím going to have a bunch of youngsters with me (lots of use for the fridge!) so it will be an extreme test.

    It does seem however that connecting the freezer/fridge to the starting battery while driving might be a good idea, allowing the solenoid on the NL box to put the max into the battery. Something to investigate for the future, preferably with a solenoid to do the switching to prevent an Oops!

    Thanks again.
    ďIf you want to go into the bush, take a Ford. If you want to get back, take a Landcruiser!Ē

    Series 80 'Cruiser GX Diesel 1996
    Cooper ST Maxx 265/75/16 tyres;
    ARB bullbar; 9000kg T-Max winch; Outback roofrack; Double fuel tank; Outback Extreme spare wheel carrier x 2; Air Spring boosters; Racor diesel filter; NL dual battery set-up; 2 x 100w solar panels; Big Country gullwings, Front Runner drawer system; Stofpad 4x4 drop-down fridge slide; NL 78-litre double door fridge/freezer; NL 60-litre freezer; Eeziawn rooftop tent; Eeziawn awning.

    SWAMBO: Honda CRV 2.2 Diesel

    Previously: '98 Defender 110 HT TDi, Landy SIII S/W, Hilux D/C 4x4,
    Isuzu 2,3 4x4, Isuzu 2,0 4x4, Isuzu 1600 4x4, Chev Nomad, Cheetah beach buggy!

  2. #42
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    Default Re: AGM Battery Recharge Time

    Looking at the power on hand while driving you can put the fridges on the starting battery but the current draw of the fridges are much lower than the charge rate so it is not a huge benefit to use the starting battery instead of the NL box. All batteries should stay close to 100% if you start fully charged.

    I am sure you will find you have enough battery power using the 3 extra batteries you have. When stationary the 2x100W panels should also work fine. Looking forward to your feedback after the trip.

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  4. #43
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    Default Re: AGM Battery Recharge Time

    Quote Originally Posted by DarylB View Post
    Thanks for your opinion. Iím heading off to Moz next week and will be camping for 4 days without AC available, so will put the system to the test. I will probably just fit the AGM to the NL solenoid box and harvest some solar power during the day.

    Iím going to have a bunch of youngsters with me (lots of use for the fridge!) so it will be an extreme test.

    It does seem however that connecting the freezer/fridge to the starting battery while driving might be a good idea, allowing the solenoid on the NL box to put the max into the battery. Something to investigate for the future, preferably with a solenoid to do the switching to prevent an Oops!

    Thanks again.
    A report back will be appreciated
    Robert van den Berg

    1998 Daihatsu Rocky 'The Kitty'
    2002 Daihatsu Rocky 'The Bully'

    "Socialism only works in two places: Heaven where they don't need it and hell where they already have it." -Ronald Reagan.

  5. #44
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    Default AGM Battery Recharge Time

    Quote Originally Posted by Prof View Post
    A report back will be appreciated
    Wilco

    Should be a decent test as I will drive 10 minutes from camp on to the beach every day and will be standing in the sun. PV panels will have to suffice. Will only use one battery for the few days Iím there. Thursday to Sunday with the first & last days travel anyway.
    Last edited by DarylB; 2019/05/09 at 05:10 PM.
    ďIf you want to go into the bush, take a Ford. If you want to get back, take a Landcruiser!Ē

    Series 80 'Cruiser GX Diesel 1996
    Cooper ST Maxx 265/75/16 tyres;
    ARB bullbar; 9000kg T-Max winch; Outback roofrack; Double fuel tank; Outback Extreme spare wheel carrier x 2; Air Spring boosters; Racor diesel filter; NL dual battery set-up; 2 x 100w solar panels; Big Country gullwings, Front Runner drawer system; Stofpad 4x4 drop-down fridge slide; NL 78-litre double door fridge/freezer; NL 60-litre freezer; Eeziawn rooftop tent; Eeziawn awning.

    SWAMBO: Honda CRV 2.2 Diesel

    Previously: '98 Defender 110 HT TDi, Landy SIII S/W, Hilux D/C 4x4,
    Isuzu 2,3 4x4, Isuzu 2,0 4x4, Isuzu 1600 4x4, Chev Nomad, Cheetah beach buggy!

  6. #45
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    Default AGM Battery Recharge Time

    Quote Originally Posted by Prof View Post
    A report back will be appreciated
    So, after fitting the Discover 100Ah battery to my NL Solenoid battery box I decided the proper test would be not to take any other auxiliary batteries for the weekend. I packed my NL 80 dual door fridge and set the freezer to -8 and fridge to +4.

    Left home in Nelspruit with the freezer compartment full of frozen foods and battery fully charged, freezer at -18.

    Had a 4-hour drive to our camp in Mozambique, arriving at midday, where I switched over to 2 x 100w solar panels running to the battery through a Victron 75/15 MPPT.

    The fridge was used for drinks repeatedly over the weekend and the freezer only opened once or twice a day. The fridge/freezer was left in the back of my LC 80 Series and for most of every day it was parked on the beach, doors & windows closed, so interior temps were high. But the solar was getting full sun from about 9.30-10 am until around 3.30-4pm. Oblique angled sun before & after that.

    The drive from camp on to the beach & back each day was not more than 10 minutes, so minimal input.

    The NL auxiliary battery monitor never once dipped out of the green lights, only dropping as low as to show one green light after running all night. By late afternoon the monitor showed full charge again.

    Fridge/freezer ran continuously on auxiliary power from Friday midday to Sunday evening.

    Very satisfied with this setup, but must add that I had clear cloudless days so the PV panels were getting a good input.

    But I still donít know how long it might take to fully charge that AGM via solar should I discharge it considerably, like below 50%.

    Thatís for another day.
    Last edited by DarylB; 2019/05/19 at 06:00 PM.
    ďIf you want to go into the bush, take a Ford. If you want to get back, take a Landcruiser!Ē

    Series 80 'Cruiser GX Diesel 1996
    Cooper ST Maxx 265/75/16 tyres;
    ARB bullbar; 9000kg T-Max winch; Outback roofrack; Double fuel tank; Outback Extreme spare wheel carrier x 2; Air Spring boosters; Racor diesel filter; NL dual battery set-up; 2 x 100w solar panels; Big Country gullwings, Front Runner drawer system; Stofpad 4x4 drop-down fridge slide; NL 78-litre double door fridge/freezer; NL 60-litre freezer; Eeziawn rooftop tent; Eeziawn awning.

    SWAMBO: Honda CRV 2.2 Diesel

    Previously: '98 Defender 110 HT TDi, Landy SIII S/W, Hilux D/C 4x4,
    Isuzu 2,3 4x4, Isuzu 2,0 4x4, Isuzu 1600 4x4, Chev Nomad, Cheetah beach buggy!

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  8. #46
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    Default Re: AGM Battery Recharge Time

    Quote Originally Posted by DarylB View Post
    So, after fitting the Discover 100Ah battery to my NL Solenoid battery box I decided the proper test would be not to take any other auxiliary batteries for the weekend. I packed my NL 80 dual door fridge and set the freezer to -8 and fridge to +4.

    Left home in Nelspruit with the freezer compartment full of frozen foods and battery fully charged, freezer at -18.

    Had a 4-hour drive to our camp in Mozambique, arriving at midday, where I switched over to 2 x 100w solar panels running to the battery through a Victron 75/15 MPPT.

    The fridge was used for drinks repeatedly over the weekend and the freezer only opened once or twice a day. The fridge/freezer was left in the back of my LC 80 Series and for most of every day it was parked on the beach, doors & windows closed, so interior temps were high. But the solar was getting full sun from about 9.30-10 am until around 3.30-4pm. Oblique angled sun before & after that.

    The drive from camp on to the beach & back each day was not more than 10 minutes, so minimal input.

    The NL auxiliary battery monitor never once dipped out of the green lights, only dropping as low as to show one green light after running all night. By late afternoon the monitor showed full charge again.

    Fridge/freezer ran continuously on auxiliary power from Friday midday to Sunday evening.

    Very satisfied with this setup, but must add that I had clear cloudless days so the PV panels were getting a good input.

    But I still donít know how long it might take to fully charge that AGM via solar should I discharge it considerably, like below 50%.

    Thatís for another day.
    BTW after getting home last night after a five hour drive (excluding a 2-hour lunch stop where the car got really hot in the sun) I removed the battery box from my LC and connected a 24amp MeanWell 3-stage Charger to it to get it topped up. After about 30 minutes the chargerís green light came on indicating fully charged and now floating. Switched over to the 5A NL maintenance charger and it went through the stages pretty quickly and settled on fully charged/float too.

    So it does seem that the solenoid is doing its job along with my alternator.
    ďIf you want to go into the bush, take a Ford. If you want to get back, take a Landcruiser!Ē

    Series 80 'Cruiser GX Diesel 1996
    Cooper ST Maxx 265/75/16 tyres;
    ARB bullbar; 9000kg T-Max winch; Outback roofrack; Double fuel tank; Outback Extreme spare wheel carrier x 2; Air Spring boosters; Racor diesel filter; NL dual battery set-up; 2 x 100w solar panels; Big Country gullwings, Front Runner drawer system; Stofpad 4x4 drop-down fridge slide; NL 78-litre double door fridge/freezer; NL 60-litre freezer; Eeziawn rooftop tent; Eeziawn awning.

    SWAMBO: Honda CRV 2.2 Diesel

    Previously: '98 Defender 110 HT TDi, Landy SIII S/W, Hilux D/C 4x4,
    Isuzu 2,3 4x4, Isuzu 2,0 4x4, Isuzu 1600 4x4, Chev Nomad, Cheetah beach buggy!

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  10. #47
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    Default Re: AGM Battery Recharge Time

    The world is moving on to Lithium batteries, and for very good reason. Look at the cost per cycle.



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