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electrical:12v:b2b [2020/06/25 08:59]
frater_secessus [FlexCharge]
electrical:12v:b2b [2020/07/04 11:29] (current)
frater_secessus [FlexCharge] added victron
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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 ====
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 The [[https://​amzn.to/​38399Ak|FlexCharge NC25a-12]] is a 25A charger that claims exceptional efficiency((http://​www.flexcharge.com/​nc25a.htm)),​ the ability to dump loads, and [[http://​www.flexcharge.com/​charging%20explained.htm|a proprietary charging algorithm]]. The [[https://​amzn.to/​38399Ak|FlexCharge NC25a-12]] is a 25A charger that claims exceptional efficiency((http://​www.flexcharge.com/​nc25a.htm)),​ the ability to dump loads, and [[http://​www.flexcharge.com/​charging%20explained.htm|a proprietary charging algorithm]].
 +
 +==== Victron ====
 +
 +Victron makes several DC-DC chargers, some of which are configurable by bluetooth. ​ 12v examples:
 +
 +  * Orion-Tr 12|12-20 20A 
 +  * Orion-Tr 12|12-30 30A 
 +
electrical/12v/b2b.1593100788.txt.gz · Last modified: 2020/06/25 08:59 by frater_secessus