Dynamite Autopower Dp600 Manual Transfer Switch.
Probably have a bad battery pack, your owner manual should tell you how to replace it.
Vacuums - How do I charge the Dynamite AutoPower 300A?- question about Vacuums. Quipp Power Pro 600a – Sharing PDF File and Manual Documents PowerPro Dynamite Auto Power 600a DP600 battery. Quipp Power Pro Powerpro dynamite autopower 600a dp600.