Is the J35 a DC-DC booster? Do I need one?
No, the J35 BMS is not a DC-DC booster, the status of the vehicle and wiring will determine if a booster is needed. This can be seen on the Tablet /J Control as an AUX input to validate if a booster is required.
If there is not enough AUX input then MiniBoost will work with the J35. (The J35 does have solar/Aux blending so it will use solar if the AUX input is not enough).
I want to add external solar panel and plug it into the Anderson plug, will this work?
Plugging into the Anderson plug will not work as the J35 will not give a voltage feedback for the solar panel’s regulator to see a battery.
Installing the external panel directly to the J35 solar input is possible if the regulator is removed from the external panel.
Installing directly to the battery regulated will also work, however, Jcontrol and JHub tablet will not see the charge input and the state of charge graphs will be incorrect. Using the external shunt will overcome this issue.
How much solar can I add?
The J35A has no solar input, the external regulator fitted by Jayco will limit the solar that can be fitted.
Early models of J35B have no solar regulator and are to be used with the external regulator, similar to J35A model.
The JControl compatible J35B has a solar regulator capable of up to 15amps, 300 watts (2 panels) inbuilt.
The J35C has an inbuilt regulator capable of 28amps, 450 watts (3 panels).
NB: It is recommended to have one battery per solar panel as the solar input will allow full charge into the batteries until they reach 14.4v
Is J35 BMS lithium compatible?
Lithium compatible model of BMS, J35D will be released shortly, the other J35 variants are not lithium compatible.
Can I add more batteries ? Type/ size?
The J35 A,B,C are capable of charging up to 300 AMP/H of battery capacity (generally 3 batteries)
What type and size of generator do I need?
A true sign wave generator is recommended, the size will depend on what is installed in the caravan
Why is the battery graph not filling back up on the tablet?
If a charge source is fitted directly to the battery, the J35 will not see the charge going in, therefore it will not fill the Graph despite the voltages rising being correct.
If the caravan is using the charge that is being generated, i.e solar in at 6 amps and the fridge, lights etc. are drawing 5 amps, the battery is only charging at 1 amp and will take a long time to charge the battery and fill the state and charge graph.
Can I fit an invertor into the J35 system?
The J35 is limited to a total 20 amps on the J35A and 35 amps on the J35B &C.
Due to the excessive current draw from an inverter, this cannot go through the J35.
Installing directly to the battery fused will also work; however, Jcontrol and JHub tablet will not see the charge input and the state of charge graphs will be incorrect. Using the external shunt will overcome this issue.
