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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7683  
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Yep it would work no problem by just adding an isolator.
Personally I switch mine to aux straight away to get charge in both. Cheers James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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31st Dec 2020 6:57pm |
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| Bongo1 Member Since: 02 Nov 2018 Location: Cheshire Posts: 815 
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I know you answered this sorry , but do you know my system .
So if the gizmo box + solenoid direct power as normal to (now isolator switch) to aux battery , will it damage the gizmo box + solenoid , will it burn them out if power cant flow to the aux battery . Normally all is fine , but i just feel weather as it is that 5 mins is not enough to replenish after starting , especially with heater etc . All that's wired to my aux batt is things like the radio , anderson socket . So its not critical that it gets a charge . But i wanted to even if temporarily cut the charge to the aux .. so when after the 5 mins timer and it links the main + aux , if i cut the feed to the aux by using an isolator switch , would the power actually bounce back to the main battery , ?????? . So if the gizmo box + solenoid direct power as normal to (now isolator switch) to aux battery , will it damage the gizmo box + solenoid , will it burn them out if power cant flow to the aux battery . |
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31st Dec 2020 8:40pm |
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| Bongo1 Member Since: 02 Nov 2018 Location: Cheshire Posts: 815
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you know your stuff jst . just found on LUNA web page that it WONT allow a connection if 1 a battery is reverse polarity , 2 short circuited , 3 or DOES NOT EXIST ...
i guess if i turn the isolator to OFF that's like a battery missing . so if i fit the isolator on the (Solenoid live feed cable) to the aux battery that should not confuse the intelligent solenoid . This may not achieve anything and i will end up leaving to connected , but nice to have that option . |
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31st Dec 2020 9:41pm |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 990  
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I’ve put a small switch into the Solenoid‘s ground wire to disable it. No need for an isolator in the high amp wires if you want the main battery to be charged only.
I‘ve also added a CTEK connector to each battery to be able to charge each one separately. Problem was, if both batteries have very different charge states, the CTEK can‘t provide enough amps, voltage wont get over 12.7V and the solenoid opens and closes, and opens... |
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31st Dec 2020 10:57pm |
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| Bongo1 Member Since: 02 Nov 2018 Location: Cheshire Posts: 815
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i have battery connectors i plug into , also 2 chargers and use the ctek for the main battery , and the other for the aux. I disconnect the link high amp lead whilst charging them , do i need to ? , or is it ok to leave linked and Still use both chargers , or just use one .
I like the switch in the ground wire , much better idea , big thanks  . Will the dual batt controller need re-setting after . |
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1st Jan 2021 1:08am |
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| Bongo1 Member Since: 02 Nov 2018 Location: Cheshire Posts: 815
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Does the solenoid still open/close then , even with the earth switched open . does that mean they are still linked
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1st Jan 2021 1:14am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240 
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If you isolate the ground wire with a switch then the whole thing is effectively dead. The solenoid won't close and power won't flow in any weird way back into or through the unit. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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1st Jan 2021 2:54am |
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| macfrank Member Since: 05 Nov 2015 Location: somewhere in the north Posts: 990
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Don't connect two chargers while batteries are linked! At best, the chargers would just be confused (they measure while charging; see manual re charge phases). At worst, they get damaged. If you disconnect the batteries by the suggested ground switch it may be ok to use both chargers. However, I wouldn't trust myself to remember to switch it off before charging 
For keeping both batteries trickle charged in winter for example, there's no need for two chargers. Just leave the NL system on and connect the CTEK to either battery (exception if both batteries have a very different SOC, as above).
Great Audible alarm for under/over voltage will be on (off: press SET for 3 secs.) and display will be on (off: SET 5 secs.) No functional resetting needed. The controller isn't required for the system to work (the solenoid has it's own electronics to do that).Last edited by macfrank on 1st Jan 2021 10:01am. Edited 1 time in total |
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1st Jan 2021 9:58am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7683
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It doesn't need resetting no. Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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1st Jan 2021 9:59am |
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| Bongo1 Member Since: 02 Nov 2018 Location: Cheshire Posts: 815
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So I can either put a switch into the small ground wire , or switch the hot wire to the aux batt , tricking the LUNA intelligent box into thinking the aux battery is not there .
Simple method or be deceitful mmmm . That's deceitful to LUNA |
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1st Jan 2021 10:34am |
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