FACT: in the nine years my chassis battery (A group seventy something) lasted there were 3 or 4 times when it just flat refused to start the engine, Id turn the key to ON, the dash lit up, I turned it to start, the dash went out and occasionally I got a ratcheting sound (Low battery chattering the solenoid)...
I crawled under with test gear and wrenches, it passed load test 100%, and I cleaned the terminals, put the tools away, got back in and VAROOM away I drove.
The last time, cleaning did not work,, The battery FAILED load test. (Ok, 9 years is good, 7-10 is design life).
It is possible you hooked up the charger wrong.
Oh, how did I crank er up when the battery failed? (even the emergency start would not get it going that day)
I jumperd from the house Positive to the Chassis Positive, not at the solenoid, but battery to battery, using heavy duty automotive jumper cables I have on hand or times of need. The over 500 amp hours of house battery fired that puppy up just fine (the group 70 somethign is about 78 amp hours, compares to a Group 24 but different physically).
Home is where I park it!