AMPLIFY YOUR POWER. EXPAND YOUR REACH AND RUN TIME.

In the midst of a blackout when all your crucial electronic gear goes down, what's your game plan?

A standard backup battery might give you some juice, but it won’t last forever. Critical gear like heating units, medical devices, and communication tools will be dead in the water once that fallback power is drained. Unless you're ready and equipped.

The Grid Doctor 3300XP Expansion Battery is the ultimate choice for prolonged power independence and a must-add to your Grid Doctor 3300 Solar Generator System. 

• MEET IMPRESSIVE POWER – Each 3300XP DOUBLES the power of your 

  Grid Doctor 3300 Solar Generator System — Now with built-in EMP Protection! Each XP provides a massive boost that carries you even farther in an emergency.

• TAILOR YOUR POWER – Assemble an unshakeable power tower when you stack up to seven of these expansion batteries. Connect them to your Grid Doctor 3300 Solar Generator System's battery to enhance your overall runtime to a staggering 16,384 watt hours! (maximum capacity reached when all seven 2,048Wh expansion batteries are combined for extended off-grid performance)

• STACK AND STORE – These compact and stackable batteries can be conveniently placed on top of your Grid Doctor 3300 Solar Generator System's battery. Stack them high in the basement, shed, closet, or even inside the trunk of your car.

• CHOOSE YOUR CHARGE – Connect the 3300XP to an AC wall outlet, car adapter, our solar panels, or the Grid Doctor 3300 generator battery for expanded power whether you’re bunkered in the basement, hitting the road, or exploring the outdoors. Best of all, you can use this battery while it charges for an uninterrupted power supply.

• LIVES A LONG LIFE – Features a durable lithium iron phosphate battery designed to withstand over 3,500 cycles. This guarantees a long-lasting, cost-effective solution to powering your independence from the grid.

• A CHARGE FOR ALL DEVICES – With multiple power outlets, you can power it all from power tools and camping gear to kitchen appliances and medical equipment. This battery can even power your RV!
• EXPERIENCE ULTRA-FAST CHARGING WITH 1800W POWER: Our advanced bilateral inverter technology outpaces traditional charge controllers, offering lightning-fast solar charging in just 3-4 hours, and even quicker wall charging in 2.4 hours. 

 Currently, we do not ship Grid Doctor products to Canada.

OUR COMMITMENT TO SAFETY: THE GRID DOCTOR BATTERY ADVANTAGE

When it comes to backup power, nothing matters more than safety. That’s why every Grid Doctor product uses advanced Lithium Iron Phosphate (LiFePO₄) battery technology – not the cheaper, riskier lithium-ion batteries used in many competing systems.

Here’s what that means for you:

NO FIRE RISK LIKE LITHIUM-ION

The biggest concern with the lithium-ion batteries found in many competitor products is something called thermal runaway – a chain reaction that can cause overheating, smoke, and even fire or explosions.

This is the same battery chemistry that has caused fires in electric scooters, e-bikes, and even EV recalls.

Grid Doctor’s Lithium Iron Phosphate batteries don’t do that. They’re chemically stable, even under stress. They won’t catch fire if punctured, overheated, or overcharged.

That’s why, in aircraft backup systems and other situations where failure isn’t an option, they use the same LiFePO₄ battery technology you’ll find in Grid Doctor solar generators and power banks.

After all, Grid Doctor systems are designed to operate indoors – often near your family, pets, and valuables. That’s why we refuse to compromise on battery safety.

BUILT TO LAST 4X LONGER

Most lithium-ion batteries degrade quickly, often losing capacity after just 500 charge cycles.

Grid Doctor’s LiFePO₄ batteries last for 3,000+ cycles. That’s years of use, even if you charge and discharge your power system every day.

This longer lifespan also saves you money, because you won’t have to replace your battery system nearly as often.

RELIABLE PERFORMANCE IN TOUGH TEMPERATURES

Whether it’s a freezing blizzard or sweltering heat wave, you need power that won’t fail when you need it most.

While storing your batteries in a temperature-controlled environment is recommended, Grid Doctor’s LiFePO₄ batteries perform much better in extreme temperatures than lithium-ion systems. They’re far less likely to swell, degrade, or fail under stress.

This makes them a superior choice for home emergency power, bug-out locations, and mobile power needs.

THE BOTTOM LINE

We believe the best technology is the safest technology. That’s why every Grid Doctor solar generator, expansion battery, and power bank we sell is built around non-flammable Lithium Iron Phosphate cells.

It costs a little more to do it right – but we wouldn’t trust anything else to protect your family.

KEEP YOUR OPERATIONS RUNNING

During challenging times or in the face of a crisis, maintaining a sense of normalcy is critical. Activate this battery and adhere to your regular routine, as well as seize control where you can.

In an emergency lasting three days, this is what you need to keep your household up and running like it’s any other ordinary day: one Grid Doctor 3300 generator battery and multiple of these 3300XP expansion batteries.

Here’s a breakdown of what this battery can power, whether you're inside or outside:

• Kitchen machinery, from coffee grinders to microwaves
• Refrigerators and compact freezers
• Laundry machines
• Window AC units and standalone fans
• TVs, computers, and phones
• HAM radio for crucial communication
• Internet connection
• In-home medical gear
• Power tools for projects and repairs
• Lighting solutions including LED and motion-sensor varieties
• Electric perimeter protection
• Water-pumping systems

With this setup, your operations will remain functional and resilient, regardless of your conditions. 

MODULAR POWER FOR THE WILD

The Grid Doctor 3300XP ensures you're never without power, even in the wild. Charge a collection of XPs together, then deploy them to energize your entire campsite. 

Facing the wilderness at night? Charge the units as a group, then distribute them to each tent or camp area. Illuminate your campsite, keep portable coolers running, and power up your outdoor gear—all simultaneously.* 

CHARGES QUICKLY

Implements state-of-the-art technology for lightning-fast charging of your electric tools and appliances, outpacing traditional power sources in a survival situation.

DOES DOUBLE DUTY

Thanks to pass-thru charging, there’s no need to wait for a full battery. Charge the generator while you use it to power your electric appliances and keep your household running! This uninterrupted power supply allows you to keep essential electronics operational during the most critical of times.

CHOOSE YOUR CHARGE

Charge up this battery by the sun, with an AC wall outlet, through a car adapter, or while connected to the Grid Doctor 3300 Generator System's battery. That means whether your at-home power is out, you’re stranded inside your car, or you’re bugging out in the woods, power is possible! Charge virtually any appliance or device you own.

(Do not use a GFCI outlet to charge the 3300XP battery.)

PLENTY OF POWER OPTIONS

Equipped with multiple power outlets, this powerhouse can practically power it all: kitchen appliances, power tools, ham radio mobile base stations, residential electric fences, and so much more. It can charge and run appliances in your home, inside your RV, and at your campsite.

THE POWER OF PASS-THRU CHARGING

Being able to use your much-needed appliances and keep your household operational as the battery charges is an invaluable asset in an emergency.

You won’t miss out on any of this: 

• COMMUNICATION – Keep cell phones, hand radios, and other electronics charged to remain connected to your survival crew. Plug in the radio, TV, or computer for breaking news, weather forecasts, and critical emergency information.

• SAFETY – Keep the lights on to continue tasks in the dark, as well as prevent accidents and other dangers.

• MEDICAL SUPPORT – If someone in your group relies on electric medical equipment, this uninterrupted power supply will truly be a lifesaver.

• FOOD PRESERVATION – Prevent food from spoiling when stored inside a refrigerator. Food is among your most precious resources. Save as much of it as you possibly can!

• ADAPTABILITY – Adapt to different situations as your survival circumstances change. Use the generator as it charges from solar power during the day, then rely on stored energy at night.

• LONG BATTERY LIFE ­– Since you can charge the generator while you use it, you’re less likely to deplete the battery. This extends the life of your battery for years and years of use!

The 3300XP battery provides protected charging options. Maximum Power Point Tracking, or MPPT, protects you and your electronics in an emergency through efficient charging.

This efficient charging refuels faster, ensuring your electronics operate fully sooner. Plus, the more efficient your energy use, the longer your electronics can run. Energy efficiency is optimal, reducing your dependence on unstable or unavailable power grids and making you more self-sufficient during disasters!

*The 3300XP Expansion Battery Unit contains only "DC-Out" ports. It will run devices (not included) with "cigarette lighter plugs" (12V adapters) or USB-A and USB-C plugs (like most cell phones). It can also run AC devices using an inverter adapter.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.