The above is like seeking confidence in a Lucas Ltd collision avoidance control module. There are two ways to lose confidence in WFCO products
The innocent way is to simply experience improper controls for maintaining battery lifespan and controller lifespan.
The really scary way is to not only withstand the deficiencies above but to then take one or apart and gasp at the utter ignorance of proper engineering practices (even THEORY) that are lacking in WFCO um, er, "products".
WFCO is the "Lucas Ltd" equivalent. You remember Lucas, don't you? Unwitting innovator of the intermittent windshield wiper? The accidental discoveror of the three-position-electrical-switch (SMOKE-SMOULDER-IGNITE)