When I ordered my new H-36 in 06 I was not asked about batteries but the setup was 2-4D’s
with the normal 1/2 both switch but also had 2 circuit breakers 1 for each battery and yes
had a inverter/charger and about 3 years later when the 4D’s needed replacing I went with
4-6volt for my house battery setup and added a start battery with ACR to charge the startbattery also have 2 - 195 watt solar panels.
I think H-290 camewith 1 battery for everything and Iadded a second battery forbackup.
Nick