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electrical:12v:b2b [2019/11/12 12:27] frater_secessus [Renogy] |
electrical:12v:b2b [2020/01/15 12:07] frater_secessus [limitations] |
- enough //time// at that voltage for the battery to stop accepting much current.(([[electrical:12v:battery_capacity|C/100]] to C/200)) | - enough //time// at that voltage for the battery to stop accepting much current.(([[electrical:12v:battery_capacity|C/100]] to C/200)) |
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DC-DC chargers address the first requirement, but unless you are driving for //hours// the isolator won't have enough time to fully charge the batteries. DC-DC charging is very effective on cruisers (boats) that run the engines for hours each day. They will, however, put more current into the bank due to their higher voltage. | DC-DC chargers address the first requirement, but unless you are driving for //hours// the isolator still won't have enough time to fully charge the batteries. DC-DC chargers were first marketed for cruisers (powered boats) since they run the engines ("cruise") for hours each day. |
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| **Charger throughput is generally limited** to 20-30A since higher rates would dictate $$$ internal components. This isn't as big a limitation as it might seem, since lead-acid [[electrical:solar:status#in_absorption|current acceptance drops substantially throughout Absorption]]. Untested theory: [[https://boondockplan.wordpress.com/2019/04/11/on-the-ctek-d250s-charger-and-smartpass/|b2b chargers might work well beside normal isolators]]; this is essentially the $$$ CTEK SmartPass setup described below. |
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===== CTEK D250 series ===== | ===== CTEK D250 series ===== |
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===== Renogy ===== | ===== Renogy ===== |
[[https://amzn.to/33HJ8ns|{{ https://images-na.ssl-images-amazon.com/images/I/51Hu4-7NxOL._AC_UL160_SR160,160_.jpg}}]]Renogy makes b2b chargers in [[https://amzn.to/2NGIP6U|20A]] and [[https://amzn.to/33HJ8ns|40A versions]]. | [[https://amzn.to/33HJ8ns|{{ https://images-na.ssl-images-amazon.com/images/I/51Hu4-7NxOL._AC_UL160_SR160,160_.jpg}}]]Renogy makes b2b chargers in [[https://amzn.to/2NGIP6U|20A]] and [[https://amzn.to/33HJ8ns|40A versions]]. A [[https://amzn.to/2QYuswm|50A model with MPPT charging]] is also available. |
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This charger has preset profiles for battery types. | This charger has preset profiles for battery types. |