I agree with the individual who stated that you should be more concerned about the capabilities of your local dealership. Unless you are talking about lithium-ion (it is unfair to lead-acid to do a head to head comparison), where service requirements are minimal, serviceability is your key to success in any PIT program. If you are considering lithium-ion, look for a company with a spotless safety record and an excess of 10,000 cycle life at 100% depth of discharge.