We covered Otterbox’s new modular uniVERSE iPhone case platform when launched back in May. The company teamed up with third-party accessory makers that each made a module or two to add additional functionality to the case— battery packs, tripods and stands, speakers and extra flash storage, to name a few. Today, Goal Zero is launching two new accessories for uniVERSE that let you add a battery pack and optional solar charging to uniVERSE.

The Goal Zero Slide battery is a battery pack for the Otterbox uniVERSE case with a built-in flashlight, while the new Nomad Folio is a small solar panel attachment for the Slide battery that will let you charge up as long as you have sufficient sun power. The Nomad Folio is listed at 1.5 watts or 2.5 watts for the larger iPhone models, and the company says it should charge the slide battery in about 8 hours of full sun.

The Slide battery will get you around 1 full extra charge with a 2500mAh battery for the iPhone 6/6S version or a 3500mAh battery for the iPhone 6 Plus/6S Plus. And both includes a built-in kickstand for propping up the device when on the go.

The Slide battery is available to preorder now for $54.99 for iPhone 6/6S or $59.99 for iPhone 6 Plus/6S Plus. It ships later this month.

The optional Nomad Folio solar panel will be available for $39.99 or $49.99 later this year.

You can read more on the Otterbox uniVERSE modular case system in our original post here.