Sun Xtender

Set Up a System You Can Depend on With Sun Xtender

These sealed AGM deep-cycle batteries are some of our best-selling for solar, off-grid, and renewable energy storage. The lineup spans 2V, 6V, and 12V configurations. From compact 34Ah modules to high-capacity 2V cells you wire in series to build a custom battery bank, we have the full range in store for you here in our catalog.

Part of why our customers choose Sun Xtender is because there’s no liquid electrolyte to manage, venting to plan around, or watering schedule to keep up with. This is a massive convenience upgrade over a flooded lead-acid battery setup. 

But really, it’s the internal build that separates these from a typical AGM battery. Pure lead-calcium grids with much thicker plates than the industry standard. This gives them a much longer cycle life than you’d expect from an AGM battery. 

And whereas so many manufacturers cut corners, Sun Xtender incorporates proprietary PolyGuard microporous polyethylene separators and copper alloy terminals with silicon bronze hardware. They’re built to last. They’re worth the investment.

The 2V PVX-12150HT delivers 1,215 Ah at the 24-hour rate. The 6V PVX-4050HT holds 405 Ah with built-in lifting handles. The 12V PVX-340T fits 34 Ah into a 25-pound Group U1 case if you need something more compact. 

All of these are manufactured here in the USA and ship non-spillable, mountable in any orientation, and hazmat-exempt for ground and air shipping.

Why Shop the Sun Xtender Lineup at The Solar Store?

Most online retailers have started offering exclusively lithium iron phosphate batteries. We offer those as well, but we still stock Sun Xtender because AGM is the right answer for certain builds. Whether you’re building backup power banks, remote installations, or have a project where cost matters more than per-cycle economics, we can help.

Our team knows how to pair AGM with the right charge controller setting and inverter configuration. We’ve been doing this since 2001. Get in touch today for world-class service!

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Frequently asked questions

What type of battery does Sun Xtender make?

These are sealed AGM batteries. AGM stands for absorbed glass mat. The electrolyte is held in fiberglass separators rather than free-flowing liquid. So, they’re maintenance-free, non-spillable, and easy to mount in any position.

Are these batteries made in the USA?

Yes. Sun Xtender manufactures everything in the United States.

Can I mount these batteries sideways?

Certainly! The whole point of these batteries is how flexible they are thanks to non-spillable VRLA construction. This can be the difference for RV, marine, and tight off-grid installs, where upright mounting isn’t always possible.

What sizes are available?

2V, 6V, and 12V units ranging from 34 Ah up to 1,215 Ah. The 2V cells are made to be wired in series for custom voltage battery banks. Let our customer service team help you pick the right setup for your needs.