- T6 Beach 4Motion
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the black wire is the D+ the brown Is neutral.
Looking to put solar on our Beach due to arrive next month. I would like:
1. MPPT tracker (ideally max voltage to work with 2x120W panels in series)
2. Charge leisure battery to 100% from solar and engine and keep it maintained.
3. Keep engine battery maintained (trickle)
4. Don't discharge the leisure battery to 80% as soon as the engine is started.
5. Nice to have:- Load shed once leisure battery becomes discharged to prevent damage.
6. Meter or App to show current, Amp hours, and voltage.
And ideally in one small box that fits in the space where the split charge relay is under the seat. Also conscious that this will be a brand new Beach, so a bit wary of messing with it too much and affecting the warranty!
I've seen 5 devices in this space at reasonable price (<£300 or so), but none do everything I want. Ablemail looks like it is nearly there, but doesn't maintain the starter battery.
I suspect 2 boxes will achieve all this, but not sure which combination would be best. Any suggestions much appreciated.
Requirement Victron SmartSolar Votronic MPP 250 Duo CTEK D250SE Redarc BCDC Ablemail AMS12-12-30 1. MPPT tracker (ideally max voltage to work with 2x120W panels in series)
Y Y N (Max voltage 23V) Y Y 2. Charge leisure battery to 100% from solar and engine and keep it maintained. Y Y Y Y Y 3. Keep engine battery maintained. N Y Y N N 4. Don't discharge the leisure battery to 80% as soon as the engine is started. N N Y Y Y 5. Nice to have:- Load shed once leisure battery becomes discharged to prevent damage. Y N N N N 6. Display or App to show current, Amp hours, and voltage. Y Y N (I think) N Y (maybe) Nice to have:- Ability to have a different type of leisure battery from the starter battery N N Y Y Y
??Don't discharge the leisure battery to 80% as soon as the engine is started.
Nice to have:- Load shed once leisure battery becomes discharged to prevent damage.
The Votronic is just a solar charger. It works *in addition* to the charge received from the alternator which is designed for the original battery. So even if you installed a LiFePO4 battery and set the Votronic to LiFePO4, the alternator would try and charge as per the original battery while driving. This would not end well.I'm not sure this information is correct. I just installed a Votronic dual MPPT (the 165W version since I'm only using a single panel) and it has comprehensive options for the leisure battery type selection including multiple voltages per type, with a separate lead for the starter (lead).
View attachment 63331
No, The leisure battery would not be used during the actual start, because the VW relay that connects the leisure battery to the engine battery to charge it up only kicks in *after* engine start. Once it does kick in though, if the Leisure battery has been charged to 100% by the Votronic, then it will be discharged down to 80% because it is directly connected to the engine battery via that relay. The engine battery is only charged to a max of 80% on the T6 due to Bluemotion.Are you saying you think starting the engine will draw from the leisure batteries? Because the controller is only connected to the starter by a thin 5A cable and charges from 0 - 1.0A according to the manual. It doesn't otherwise change how the relay connects the two, so I can't see how this is possible.
Load shedding is where the load (eg. lights, fridge etc) can be automatically switched off when the leisure battery voltage gets too low. As standard the 12V sockets and lights are directly connected to the leisure battery, so there is nothing stopping you leaving everything on and running the battery down and destroying it. If you use the Victron, you can rewire the 12V sockets etc so they go via the load shed relay in the Victron, which will then switch them off at low voltage, thus protecting the battery.I'm no expert on what Load Shedding is, but the 1st page of the manual I attached has a lot of details regarding Votronic features which seem fairly comprehensive in terms of power management.
Maybe someone can clarify if it has an equivalent feature which is described differently. I'm interested for my own sake since I have it installed as of this week!
I haven't noticed leisure battery discharge when driving. I installed a monitor on existing battery setup to analyze all current flows.
If you are driving after hookup the leisure battery stays well topped up at 14,8volts with trickle amps going in.
At least on mine T6 beach.
Actually yes. I think this is a hack how to fully charge leisure battery while driving. By loading it during the ride. Mine is almost always under load, cooking food and charging other batteries, must be the reason I always see that top voltage.Hi SP0 - do you have a significant load on the leisure battery? I seem to remember that the charging voltage increased to 14.8 with a >10A load approx. If no load, then my leisure battery voltage drops.
Thank you. Yes, of course you are right, my bad wording.The battery isolation relay is the one marked 100, it is not a voltage sensing relay, it is controlled by a signal from the Body Control Module (BCM) pin T73a/3 wire colour black and +ve signal.