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We’re just going to come out and say it: the Flex Battery is the smartest, most versatile Lithium-ion expansion battery ever made.  Not only that, it is also the lightest, most compact Lithium-ion expansion battery you can find.

The Flex Battery also is the Lithium expansion battery for your Kodiak and Apex. It will double your storage capacity with 1,069 Watt-hours of additional capacity.


  • Internal Battery: 1,069 Watt-hours nominal, Lithium-ion, genuine LG cells
  • Charging:  Direct charge using Standard Wall Charger or Car Charger. Solar charge via Flex Power Console, Apex, or Kodiak Solar Power Stations. Accepts charge using any of the above methods simultaneously.
  • Lithium-ion Battery Expansion: Yes; the Flex Battery accepts up to 96 Flex Batteries (5 Flex Batteries per vertical stack maximum, connect multiple stacks with Flex Battery Adapter Plate—coming soon)
  • Automatic Battery Balancing: When connecting to a Flex, Apex, or Kodiak Power Station, the Flex Battery will auto balance with the connected power station to ensure safe and effective operation.
  • Connecting to Apex or Kodiak Power Stations: Connect using Flex Battery-to-Ring Terminal Adapter Cable (sold separately).
  • 5.5mm x 2.5 mm AC Input: User-friendly, plug-and-play interface for the Inergy Standard Wall Charger.


    • Dimensions: 14" x 8" x 4.7"
    • Weight: 15 lbs
    • Warranty: 1-Year


    The Flex Battery is the smartest, most versatile Lithium-ion expansion battery ever made. The Flex Battery includes two Molex connector ports on the top and bottom panels for connecting to a Flex 1500 or Flex DC Power Console, MPPT Supercharger, to another Flex Expansion Battery or to a Kodiak or Apex power station.

    There are several important things you need to know about the Flex Battery:

    1. You can use it to expand the Flex 1500 Power Station and enjoy the most versatile plug-and-play portable solar energy storage device in the world.

    The Flex 1500 Power Station allows you to gather and store clean, renewable power whenever and wherever you need it. The Flex 1500 packs a huge punch in a compact, lightweight package with an efficient 1,500-Watt continuous (3,000 surge) pure sine wave inverter, so you can power dozens of 110-120VAC devices and appliances wherever you need it. You can expand the Flex 1500 with as many Flex Batteries as you need (up to 96)

    2. You can use it with the Flex DC Power Station as a powerful solar-powered, regulated DC power source. 

    If you are a DC-only user and you don’t need the AC power of the Flex 1500 Power Station, you can choose the Flex DC Power Station with as many Flex Batteries as you need (up to 96) and enjoy 13.8V of regulated DC output. You can now use the full capacity of your battery with 12V devices like portable refrigerators, water pumps, and DC appliances and devices.

    3. You have three ways to charge the battery with solar panels. 

    First, the MPPT controller in the Flex 1500 and Flex DC Power Stations will charge each Flex Battery in your stack at the same time. One single Flex Battery will charge in as little as 3 1/2 hours. More batteries in the stack will, of course, take more time. If you need faster charge times, you can add the Flex MPPT Supercharger, which triples the standard solar charge input to an unheard-of 90A input.

    4. You can use it with the Kodiak and Apex. 

    That’s right! The Flex Battery also is the Lithium-ion expansion battery for your Kodiak and Apex systems. It will nearly double your storage capacity with 1,069 Watt-hours of additional capacity. If you want, you could connect up to 96 Flex Batteries to one Kodiak or Apex for a ludicrous amount of battery capacity.

    5. The Flex Battery is plug and play, requiring no manual Voltage balancing. 

    The Flex Battery can detect the state of charge of your Kodiak, Apex or additional Flex Battery, and decide whether the partner battery is too low and needs to be charged. If the partner battery is too low, the Flex Battery will automatically charge it to a safe Voltage range, at which point it will automatically connect to the partner battery and work as one large battery bank.

    6. You can expand your system to a ludicrous amount of power. 

    This is worth mentioning once more. You can connect up to 96 Flex Batteries (approximately 102 kWh) to one Flex 1500 Power Station or Flex DC Power Station (or to an Apex or Kodiak) and enjoy the same plug-and-play functionality.



    Let’s just review this because the Flex Battery is so versatile, it might be easy to forget one.

      When connected to a Flex 1500 or Flex DC Power Station

      1. AC charging with a standard or Quick Wall wall charger
      2. Solar charging with up to 90V or 30A of solar panel input
      3. Solar charging with up to three strings of solar panels with up to 90V each (90A or 1,200W of total solar panel input) with the MPPT Supercharger
      4. Car charging with DC Car Charger

      When connected to an Apex or Kodiak portable power station

      1. AC charging with a standard or Quick Wall AC wall charger
      2. Car charging with DC Car Charger
      3. Solar charging through the Apex or Kodiak charge controller

      LCD Control Screen

      The LCD control screen allows you to track state of charge, voltage, and power output of each battery individually.

      Battery Safety Features

      We use only genuine LG cells, which hold to the highest safety standards in the industry. The Flex battery has several intelligent safety features:

      1. Multiple temperature sensors for smart cooling and battery protection
      2. Emergency shut-off control to protect all batteries in a stack from catastrophic damage. Any major failure in one battery can signal the rest to shut-off as a further precaution.
      3. Advanced BMS (battery management system) monitors all cell strings individually, protecting from events such as short-circuit, over/under temperature, over-charge and over-discharge.
      4. Smart data recording that tracks charge/discharge cycles, and other significant events that may affect the lifespan and capacity of the system.
      5. Rapid, automatic cell balancing during charge.

      Free Shipping Policy:

      We offer free shipping across the lower 48 states on all orders! There is no minimum cart size required. 

      If you live in Alaska, Hawaii and or outside the US we would be happy to help with the associated shipping fees. Just give us a call at 1.800.347.2291 or email us at info@plugandplaysolarkits.com, and we will come up with a custom quote to get you on your way with your new solar gear. 

      Delivery to rural areas, special orders, & Truck Freight shipments may take extra days to arrive and may have extra fees.

      Plug and Play Solar reserves the right to cancel this policy at any time.

      Order Confirmation:

      After your order is placed, we will send you a confirmation email.  This email means we have received your order and start fulfilling the shipment. If it is something we don't regularly stock we will reach out to our suppliers and have it sent straight to you. If an item you ordered is on back order, we will give you a call immediately to resolve the ordering issue.  


      Once your order is packed and ready to ship we will follow up via email with the corresponding tracking number.  

      Most orders will be shipped by FedEx or GSO.

      International Orders:

      International Orders require special processing. When you place an international order, it will require extra fees, due to transit, duties, and tariffs. We will calculate shipping and let you know the total price. At which point you can proceed with the order or cancel.


      UPON DELIVERY ALL SHIPMENTS SHOULD BE INSPECTED. VISIBLY DAMAGED PACKAGES SHOULD BE REFUSED. If any damage is noticed, note the damage on the freight bill.  If your product is damaged during shipping, please contact us at  info@plugandplaysolarkits.com immediately. Keep the original packaging for all the items needing return. We will issue a return number, at which point the items can be shipped back.

      If the items are damaged and delivered by Freight, contact the number on the bill of delivery immediately. After contacting the freight company, call our customer service at 1.800.347.2291. Please note that by signing for your delivery you accept it in its current condition. Plug and Play Solar cannot be held responsible for any damage, missing equipment, functionality, etc. after the shipment is signed for. If you authorize no signature delivery, Plug and Play Solar cannot be held responsible for any damage, missing equipment, functionality, etc. that occurred during shipping. Plug and Play Solar and our partners work with professionals to ensure items are properly packed for the journey ahead. If damage does occur we will work hard to aid in resolving the issue.

      Cancellations & Refunds:

      To cancel an order, reply to the confirmation email you received when you placed your order online. Just tell us why you need to cancel and we will process it as soon as we can. If your order hasn't shipped the is no penalty.  If you order has shipped, you will also be responsible for return shipping charges. Refunds will be issued to the credit card that you used when placing your order. 

      To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

      How do I return a product?

      If you want to return an item, please send an email to  info@plugandplaysolarkits.com

      Returns will only be accepted within 30 days of the receipt of your product.  The product must be returned unopened in the original packaging.

      We do not accept returns of used products.  You should also provide us with a receipt of your purchase and a reason for returning the item.

      Customers are responsible for paying all shipping and handling costs for returning an item. 

      We are a small, local Flagstaff, Arizona company offering big name products. We know other websites sell some of the same products that we do, and that you can choose to buy from anyone. Just know that at the end of the day Plug & Play Solar will bend over backwards to earn and keep your business. 

      Not only do we sell these products, but we have dedicated ourselves to understanding and teaching people how easy solar can be to install and use. 

      Here are the top reasons to buy from Plug & Play Solar.

      100% Understanding of Solar - Know that you are buying from solar experts. During your purchase we will be there to answer your questions, and after we will be there to help you install. We fully understand solar sizing for every application.

      Customer Service Is Our #1 Priority - We work hard for you, our customer. We guarantee to help you in any way possible. Once you purchase from us, expect to receive confirmation of your order and tracking information once it ships. 

      100% Safe Shopping - Every transaction that goes through our store is 100% safe as we offer purchasing through PayPal, Amazon Pay, financing through Affirm and credit card payments directly through our store.

      Fully Insured Shipments - Every shipment that leaves our warehouses are fully covered in case of a lost item or damage. Please refer to the Shipping & Returns tab to learn more about our policy.

      Free Shipping - On nearly all shipments to the lower 48 ship free.

      Authorized Dealers - Plug & Play Solar is an authorized dealer for all the brands on our website including Renogy, Zamp, Inergy, GoSun, Lion Energy and Humless. 

      Online Security

      Every transaction at plugandplaysolarkits.com is guaranteed safe.

      We site uses SSL encryption technology, the same as all the big banks, so you know your credit card info is being handled in the safest possible way.

      Thanks to current technology and encryption, it is now safer to buy online than in person. Once you enter your information at checkout it is immediately encrypted and sent to the receiving computer where it is unscrambled and processed where no other prying eyes can see it.

      Would you still rather order over the phone?

      Call us at 1.800.347.2291 and we'd be happy to process any order over the phone.



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