Interstate Batteries

If you've been shopping for a battery — whether for your car, boat, golf cart, or solar setup — you've probably come across the Interstate name. It's one of the most widely distributed battery brands in the U.S., and the lineup is broader than most people realize.

This guide covers the brand basics, all four battery types, chemistry differences, key specs to check, and a quick buyer's guide — whether you're replacing a car battery or building an off-grid solar system.

What are Interstate Batteries?

Interstate Batteries is an American battery brand founded in 1952 by John Searcy in Dallas, Texas. Searcy named it after the new U.S. interstate highway system — fitting for a company that started by delivering batteries from the back of a pickup truck.

Today, the company distributes through more than 200,000 dealer locations across North America. It's privately held, headquartered in Dallas, and covers a wide range of applications: cars, trucks, marine, golf carts, RVs, solar, and industrial.

Who actually manufactures Interstate batteries?

Interstate is primarily a marketing and distribution company, not a manufacturer. The physical batteries are produced by third-party partners, including Exide Technologies and Brookfield Business Partners, among others. This is common in the battery industry — many recognizable brands work the same way.

Are Interstate batteries good?

Yes, and the data backs it up. In independent surveys of boaters, Interstate consistently ranks as the most used flooded battery brand for trolling motors. Around 70% of Interstate owners say they would buy the brand again.

The batteries are a solid mid-range value pick. Not the cheapest option on the shelf, but reliable, accessible, and well-supported through a large dealer network.

Types of Interstate Batteries

Interstate car and auto batteries

When most people search for interstate car batteries or interstate auto batteries, they're looking for a standard SLI (Starting, Lighting, Ignition) battery — the kind that starts your engine and keeps your electrical system running.

Interstate offers several car battery series:

If you live somewhere with cold winters, lean toward the MTP or MTZ. If heat is your main concern — think Texas, Arizona, Florida — the MT series is built for that. For modern vehicles with lots of electronics (start-stop systems, advanced audio, heated seats), the MTZ AGM is better at handling the higher electrical load.

Interstate marine batteries

Marine batteries come in three types, and mixing them up is one of the most common mistakes boat owners make.

Interstate marine batteries are available in all three types. Key models include:

• SRM-24: 12V, 550 CCA / 690 MCA, 140 RC minutes. A flooded deep cycle battery suited to trolling motors and onboard electronics.
• SRM-27: 12V, 600 CCA / 750 MCA, 160 RC, 88 Ah. A step up in capacity from the SRM-24.
• 31M-AGM: 12V pure lead AGM. Sealed and maintenance-free, with strong deep cycle performance and solid cranking ability.

A starting battery fires a huge burst of current for a few seconds to turn the engine over, then recharges immediately. A deep cycle marine battery does the opposite — it delivers a steady, moderate current over hours to run accessories like fish finders, lights, and trolling motors.

If your boat runs a trolling motor and has electronics to power, a dedicated deep cycle — or a dual-purpose battery if space is tight — is the right choice.

Interstate golf cart batteries

Golf cart batteries have one of the most demanding jobs in the battery world: deep, repeated discharge cycles, often in hot conditions, day after day.

Interstate offers several series specifically for golf carts:

Most golf carts run on either a 36V or 48V system. You don't buy a single 36V battery — you wire multiple lower-voltage batteries in series. A common 48V setup uses:

• Eight 6V batteries
• Six 8V batteries
• Four 12V batteries

Six-volt batteries typically offer higher amp-hour capacity and longer cycle life per cell, which is why they're the traditional favorite for golf carts.

The "Extreme" series uses heavier grids, higher-density oxide plates, and glass mat envelope separators. That adds up to more cycles before the battery needs replacing.

The Lithium 48V option can use 100% of its capacity (vs. ~50% for flooded), recharges up to three times faster, and lasts far longer. It costs significantly more upfront but can outlast two or three sets of lead-acid batteries.

Interstate RV and solar batteries (deep cycle)

This is where Interstate's lineup is most relevant to off-grid and renewable energy buyers. An Interstate deep cycle battery in this category is a sealed 12V unit built on VRLA (Valve-Regulated Lead Acid) technology — either AGM or Gel — sold through dealers like A1 SolarStore.

These are not the flooded golf cart or marine batteries described above. They're sealed, spill-proof, and designed for stationary or semi-stationary use: RV house power, off-grid solar banks, UPS systems, and backup power.

Interstate DCM series (AGM)

An Interstate AGM battery absorbs the electrolyte in glass mats between the plates. This makes it sealed, maintenance-free, and resistant to vibration. AGM units can discharge to about 50–80% of their capacity safely and handle charging from solar panels well.

Interstate GEL series

Gel batteries suspend the electrolyte in silica gel rather than liquid or glass mat. They're a bit more sensitive to charging parameters — they need a gel-compatible charger — but handle deep discharges and high-temperature environments well.

Several of these models are available directly in the A1 SolarStore catalog, including the DCM0035, DCM0075, and DCM0100. If you're building or expanding a solar storage system, that's a practical place to start comparing capacity and pricing.

Whether you need an RV battery or a solar storage bank, either AGM or Gel will work well. AGM is more forgiving with chargers and more widely available. Gel is worth considering if your system runs in high heat regularly or if you need slightly deeper discharge tolerance. Both are sealed and maintenance-free.

Battery chemistries: what's the difference?

DoD (Depth of Discharge) is the percentage of the battery's capacity you can use before recharging. Draining a flooded battery past 50% regularly will shorten its life significantly. Lithium can be run nearly flat without damage.

Key specs to look at before you buy

Voltage (V)

Voltage must match your system exactly. Most RV, marine, and solar setups run on 12V. Golf carts typically run on 36V or 48V systems built from multiple 6V, 8V, or 12V batteries wired in series.

Amp hours (Ah)

Ah is capacity — how much energy the battery stores. A 100 Ah battery can theoretically deliver 5 amps for 20 hours, or 10 amps for 10 hours. The higher the Ah, the longer your equipment can run between charges.

Reserve capacity (RC)

RC tells you how many minutes the battery can deliver 25 amps before dropping below usable voltage. It's a more practical measure than Ah for many buyers. A battery with 180 RC gives you 3 hours of 25A power.

Cold cranking amps (CCA)

CCA is only relevant for starting batteries. It measures how much current a battery can deliver at 0°F (−18°C) for 30 seconds without dying. Not relevant for pure deep cycle applications, but important for car and marine starter batteries.

Depth of discharge (DoD)

DoD is the percentage of capacity you can safely use. For flooded lead acid, stay above 50%. For AGM and Gel, you can go down to 20–50% regularly. For lithium, you can go nearly to 0%. Exceeding the DoD shortens battery life fast.

Cycle life

Cycle life is the number of full charge/discharge cycles before the battery degrades to about 80% of original capacity. Flooded: 200–500. AGM/Gel: 300–500. Lithium: 3,000–5,000.

Group size

Group size is a standard code (like Group 24, 27, or 31) that defines the physical dimensions of the battery. The battery must physically fit your tray or compartment. Always check group size compatibility before buying.

Warranty

Interstate warranties vary by series — typically 12 to 24 months free replacement. Check the specific model's warranty before purchasing, since it can differ significantly between product lines.

How to choose the right Interstate battery

Making the right call: your Interstate battery shortlist

"Interstate" covers a lot of ground. A flooded golf cart battery and a sealed AGM solar battery share a brand name and little else — different chemistry, different maintenance needs, different price points. Buying the wrong type usually means buying twice.

A few things worth keeping in mind before you order: for car and truck batteries, climate matters more than most buyers expect — the MT and MTP series are optimized for opposite ends of the thermometer, and putting the wrong one in a hot-climate vehicle shortens its life noticeably. In marine setups, mixing up starting and deep cycle batteries is a common and expensive mistake. And golf cart buyers who run daily cycles will get meaningfully more life from the Extreme series or an AGM model than from a budget flooded option, even if the upfront cost is higher.

For solar and RV storage, don't get distracted by CCA. It means nothing for deep cycle use. The numbers that actually matter are Ah (capacity), RC (runtime), and DoD (how hard you can push it). The Interstate DCM (AGM) and GEL series both work well in off-grid systems; the main practical difference is that Gel needs a compatible charger and handles heat a little better.

A1 SolarStore carries Interstate deep cycle batteries. It's a good place to compare specs side by side and check what's in stock.

FAQ

Read All