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Battery brands

Optima batteries in RVs: RedTop, YellowTop, BlueTop

Optima's color-coded spiral-cell AGM batteries are easy to recognize. Here is where each fits in an RV.

Motorhome engine compartment with the chassis starting battery visible
The chassis battery starts the engine. It is separate from the house bank.

Optima batteries are AGM batteries built with spiral-wound cells, sold under color names: RedTop for starting, YellowTop for deep-cycle and dual-purpose use, and BlueTop for marine (in starting and dual-purpose versions). Optima is a brand of Clarios.

Where Optima fits in an RV

  • Chassis starting battery: RedTop is designed for starting. Some motorhome and tow vehicle owners use them.
  • House battery: YellowTop is the deep-cycle option. It can work as a house battery, though RV owners often choose larger flat-plate AGM or lithium batteries for more capacity per dollar.
  • Dual purpose: YellowTop and BlueTop dual-purpose models can start an engine and handle cycling, which suits some small setups.

AGM charging

Like all AGM batteries, Optimas should be charged with an AGM-appropriate profile. Overcharging shortens AGM life. Check your converter and solar controller settings. See converters and batteries.

Two deep-cycle batteries mounted on the front tongue of a travel trailer
Travel trailer house batteries on the tongue, ahead of the propane tanks.

Florida notes

Spiral-cell AGMs resist vibration well and don't need watering. Heat still shortens their life, as it does for every lead battery.

See our AGM battery service and the comparison of lithium vs AGM vs flooded.

About specs: Battery makers update models, capacities and warranties often. We don't list specs here because they change. Check the maker's current spec sheet, or ask us, before buying.

Sources

Facts about companies and products on this page come from these sources. Check the maker for current models and specifications.

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