"Charging amps 8-35 amps at 14.4 to 14.9
* Warning: Do not use a charger with smaller amperage than the recommended Charging Current shown above.
Maintainers should ONLY be used to maintain a fully charged battery but NEVER as a charger"
So that one is ok at 14.4 but beware of using only solar to recharge it, since solar will often be less than 8 amps.
(EDIT--some AGMs have a minimum amps like that, but not all. I am lucky that mine do not have a minimum amps spec, so it just takes longer if using fewer amps. )
Your 45 amper, if doing 40-42 is also over the 35 spec, but that might not be too critical, don't know. (Mex sometimes pooh-poohs those limits)
My 100AH AGM is limited to 27a for recharging, so my 55 amp converter is too much. I beat that by getting a second 100AH so I can do both with the 55. That is one more amp than the spec 54, but so far so good! :)
