I have started using a ctek mxs 5 maintainer for trhe van battery. I have noticed that the ctek ds250se I have to charge the leisure battery appears to be facilitating intermittent current into the leisure battery. What has me a bit concerned is that it is putting 17-18 amp into the leisure battery, for around 10 seconds, this continues periodically about 2-3 times a minute. Is this going to have a detrimental effect on the van battery? Toying with the idea of putting a switch on the battery+ to ds250se to stop this. Advise appreciated.
Ctek mxs 5 and ds250se
- Thread starter dubLU
- Start date
Totally normal and expected behavior.
I call it. The auto vsr feature.
The dc-dc is seeing the increased voltage from the charger, and same as then engine running.....the dc-dc Kicks in and starts charging the LB.
This will then drop the starter voltage a bit..... As the mx5 is only low current... So the dc-dc will cut out .. and so the cycle continues.
I call it. The auto vsr feature.
The dc-dc is seeing the increased voltage from the charger, and same as then engine running.....the dc-dc Kicks in and starts charging the LB.
This will then drop the starter voltage a bit..... As the mx5 is only low current... So the dc-dc will cut out .. and so the cycle continues.
Ultimately, with enough time both batteries will end up fully charged.
If you're concerned that it might take a long while for the 5 amps of the MXS5 to "get ahead" of the 18 amp bursts on the DS250 then rather than disrupting the wiring to the DC-DC treat yourself to the Victron 15A maintenance charger.
Otherwise everything is working as it should, if you know you're laying the van up for a bit try and do it after a decent drive so you know both batteries are well charged and the two chargers will work in tandom to counter the standby drain on both batteries.
Otherwise everything is working as it should, if you know you're laying the van up for a bit try and do it after a decent drive so you know both batteries are well charged and the two chargers will work in tandom to counter the standby drain on both batteries.
