Heating system is useless

[Skymark]

Smart alternators are controlled by an ECU to limit charging to a range as a part of emissions optimization

 

[Korg]

Seriously they should be embarrassed enough to fix this for all existing owners. What they have produced is an hvac system from a high school automotive class project. It’s pure ass

not HVAC but HAVOC system is what they delivered

 

[AWo]

I’m glad you’ve got your new order in.
I don’t think there is anything wrong with the batteries as supplied. I think the issue is when they are allowed to go flat especially if that happens a few times. Most batteries apart from Lithium will quickly be destroyed if completely flattened. Maybe your Grenadier was parked up along time before delivery or since and not had the batteries maintained?

If it is a lead-acid battery, doesn't matter if it is wet or AGM, small currents are killing them as well. That is due to the growth of crystals while power is taken out. High currents lead to small, fine crystals, low current (like ECU, smartphone loading, etc.) lead to large crystals.

These crystals are material which can not be used for power and they block the flow of current. When you charge the battery. the small and fine crystals are reverted very well. It is difficult to revert the large crystals. They may never go away and thereby you loose electrical active material, reducing the battery capacity and power thereby.

Another effect is, that when taking power from a battery both plate materials (lead and lead oxide) is turned into lead sulfate (which is reverted to lead and lead oxide while charging). That leads to physical stress in the plates and small parts can break apart, also reducing power and capacity. That an donly that is addressed by AGM. It keeps these parts in place, so they do not fall down and are lost for the capacity.

AWo