Battery charger for lithium batteries

Jan 25, 2020
Hi Shipping our Burstner Iexo 736 for six months later this year. Because of voltage differences are looking for a charger as our onboard one wont work.
we will have two 100 lithium batteries so ideally around 30/50 amps @ 12 volt dc. We have an inverter to run our air con if needed through and inverter so need to keep the batteries up if not driving. Have 420 watts of solar so that will help a bit. Have a US a dress to have the charger delivered to. Any suggestions please.
a;so looking for insurance cover as the present quote is eye watering. 6Hi months temp import of a UK registered van. Again have US address if required.
25 ft van driver 71 and 66 clean licences.