Apollo 5K • Expansion Battery

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A massive 5,376 Wh LiFePO4 Expansion Battery for the Hysolis Apollo 5K.

  • 6,000+ Life Cycles.
  • Seamlessly integrates into the Hysolis ecosystem.
  • Up to 3 Expansion Batteries can be securely stacked on Apollo wheels, or 1 Expansion Battery and 1 Apollo unit.
  • Expansion Batteries can also be placed next to the Apollo and connected with the included battery cable.
  • Up to 5 Expansion Batteries can be added to a single Apollo.
  • The Expansion Battery includes its own BMS and functions as a standalone battery that can be used with a Solar Charger, Wind Charger, AC Charger, or DC Charger.


Product Size L 23.2 in x W 14.6 in x H 11 in (11.3 including feet) (L 589mm x W 371mm x H 280mm [287mm including feet])
in the box
warranty & SHIPPING


  • Apollo 5K • Expansion Battery x 1 $3,695.00
  • Total $3,695.00
30-day any-reason Returns · 5-year Warranty

Apollo 5K

Expansion Battery
  • 30-day any-reason Returns
  • 5-year Warranty

The Apollo 5K is Trusted By


Product Size L 23.2 in x W 14.6 in x H 11 in (11.3 including feet) (L 589mm x W 371mm x H 280mm [287mm including feet])

Try it Risk Free

We want you to believe in the Apollo 5K as much as we do. That’s why we’re offering a 30 day no-questions-asked money back guarantee. So you don’t have to say yes now, try it out now and decide later.

Customer Reviews

Based on 4 reviews
Scott Edwards
Good price battery.

No problem and easy to install.


Support and communication has been fantastic

Russ Brown
Apollo 5k

You need to include the tool to disconnect cables to/from solar panels. I don’t like unplugging everything to go into eco mode . I am still awaiting the app so I can control the unit from my i-phone.

Doug A
Great Supplement

I added the expansion battery for cases where the power outage may be long, and cloudy weather might be extended. The units fit well together. Beware the battery is very heavy, so heed the two-person lift warning. With my current load, the single unit would go town to about 78% overnight, but with the expansion battery, it now only goes down to about 90%. Installation was smooth, and of course it came with the necessary cable. I also added the set of wheels as with both units together, moving them would be very hard without wheels. I do plan on adding additional load to the unit in the future, but already I'm appreciating the ease of mind in case of a power outage. We had a 5 hour outage a few weeks ago, and it was so nice not having to rush right out to set up the gas generator! One suggestion to Hysolis would be to add some specific documentation to just the expansion battery. There's likely not a lot to say as connecting it was pretty simple, but some clarification on how the expansion affects the overall unit would be nice.