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electrical:12v:b2b

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electrical:12v:b2b [2020/06/25 11:59]
frater_secessus [FlexCharge]
electrical:12v:b2b [2020/07/04 14:11]
frater_secessus [CTEK D250 series]
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 ==== CTEK D250 series ==== ==== CTEK D250 series ====
  
-The most common b2b charger with 'dwellers is the [[https://amzn.to/2RY2GNQ|CTEK D250SA]], a 20A solar/alt controller.  It has connections for both alternator and solar panel input + MPPT function, although the MPPT algo may not be partcularly robust.  +The most common b2b charger with 'dwellers is the D250 series, all of which are 20A smart chargers with integrated MPPT: 
 + 
 +  * D250 (pre-2018, discontinued) - the original, Vabs == 14.4v, Vfloat == 13.6v. 
 +  * [[https://amzn.to/2RY2GNQ|CTEK D250SA]], a 20A solar/alt controller.  Vabs selectable 14.4v and 14.7v.  Vfloat 13.6v. Added support for smart alternators.  
 +  * [[https://amzn.to/2VNkfou|D250SE]] which has 14.2 Vabs and 13.3 Vfloat for lithium settings.  
  
 House and starter batteries are combined when the starter battery holds >13.1v for 5 seconds.((https://www.ctek.com/storage/C1493FC8638168601722950C8151FF6A802476C93EC460B3BC5323C8A7951C71/9fde706a812c451ebc7257ab76e05cdb/pdf/media/ac7a2dfdc9104b30939287bdb76b81fb/D250SA-manual-low-UK-EN.pdf))  The batteries are isolated when the starter battery is "<12.8V, for 10 sec... or service battery voltage > starter battery voltage". House and starter batteries are combined when the starter battery holds >13.1v for 5 seconds.((https://www.ctek.com/storage/C1493FC8638168601722950C8151FF6A802476C93EC460B3BC5323C8A7951C71/9fde706a812c451ebc7257ab76e05cdb/pdf/media/ac7a2dfdc9104b30939287bdb76b81fb/D250SA-manual-low-UK-EN.pdf))  The batteries are isolated when the starter battery is "<12.8V, for 10 sec... or service battery voltage > starter battery voltage".
  
-The [[https://amzn.to/2TozjWu|SmartPass accessory]] adds 80A of alternator-voltage charging when Vbatt is low enough that the alternator can still charge it directly.  This combined charging((up to 100A)) will happen in the first half of Bulk mode. As house battery voltage rises to normal alternator voltage the smartpass can no longer contribute.  At that point the 20A D250SA continues voltage-boosted charging to Absorption voltage.((https://www.4x4community.co.za/forum/showthread.php/292297-Ctek-250-upgrade-to-smartpass?p=3823781#post3823781))\\+The [[https://amzn.to/2TozjWu|SmartPass accessory]] adds 80A-120A (see below) of alternator-voltage charging to the D250's output when Vbatt is low enough that the alternator can still charge it directly.  This combined charging((up to 100A)) will happen in the first half of Bulk mode. As house battery voltage rises to normal alternator voltage the smartpass can no longer contribute.  At that point the 20A D250SA continues voltage-boosted charging to Absorption voltage.((https://www.4x4community.co.za/forum/showthread.php/292297-Ctek-250-upgrade-to-smartpass?p=3823781#post3823781))\\ 
 + 
 +  * Smartpass 80 - original model.  80A + 20A = 100A. 
 +  * [[https://amzn.to/2YZuIPG|Smartpass 120]].  120A + 20A = 140A. 
 +  * [[https://amzn.to/3e156pA|SmartPass 120S]] as above, but with support for smart alternators.
  
 Note:  the CTEK D250SA((and the pre-2018 D250**S** model)) panel voltage (Vpanel) maximum is 23v.((https://www.ctek.com/storage/ma/b21ecd5d5e5943a995474cf36d586451/956c3913c8cc4319bb4e47baea0c6d82/pdf/A78BBB08A9DF8976DB79E21271E091489ACEF47A/D250SA-manual-UK-EN.pdf, pdf))  There are user reports that the unit is repairable after overvoltage or polarity damage.((https://www.4x4community.co.za/forum/showthread.php/322874-CTEK-D250S-Problem?s=a2bc518379e50466c9ec523e8b114053&p=4270868#post4270868)),((https://expeditionportal.com/forum/threads/dual-battery-system-with-ctek-d250-not-charging-battery-over-12-volts.174927/post-2416300)) Note:  the CTEK D250SA((and the pre-2018 D250**S** model)) panel voltage (Vpanel) maximum is 23v.((https://www.ctek.com/storage/ma/b21ecd5d5e5943a995474cf36d586451/956c3913c8cc4319bb4e47baea0c6d82/pdf/A78BBB08A9DF8976DB79E21271E091489ACEF47A/D250SA-manual-UK-EN.pdf, pdf))  There are user reports that the unit is repairable after overvoltage or polarity damage.((https://www.4x4community.co.za/forum/showthread.php/322874-CTEK-D250S-Problem?s=a2bc518379e50466c9ec523e8b114053&p=4270868#post4270868)),((https://expeditionportal.com/forum/threads/dual-battery-system-with-ctek-d250-not-charging-battery-over-12-volts.174927/post-2416300))
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 Note:  polycrystalline panels may be more useful here, as their Voc should be a bit lower than mono.   Note:  polycrystalline panels may be more useful here, as their Voc should be a bit lower than mono.  
  
-> The D250SA trickle charges the starter battery from a solar panel at intervals of 3 seconds if the service battery is fully charged.((https://www.ctek.com/storage/C1493FC8638168601722950C8151FF6A802476C93EC460B3BC5323C8A7951C71/9fde706a812c451ebc7257ab76e05cdb/pdf/media/ac7a2dfdc9104b30939287bdb76b81fb/D250SA-manual-low-UK-EN.pdf))+> The D250-series trickle charges the starter battery from a solar panel at intervals of 3 seconds if the service battery is fully charged.((https://www.ctek.com/storage/C1493FC8638168601722950C8151FF6A802476C93EC460B3BC5323C8A7951C71/9fde706a812c451ebc7257ab76e05cdb/pdf/media/ac7a2dfdc9104b30939287bdb76b81fb/D250SA-manual-low-UK-EN.pdf)) 
    
 ==== Sterling ==== ==== Sterling ====
electrical/12v/b2b.txt · Last modified: 2024/03/23 19:42 by frater_secessus