Solar Energy Maui Battery Storage

When it comes to powering your home or business with solar energy, battery storage is a key component of any solar system installation. Here in Hawaii, two of the most popular battery storage systems on the market are Enphase and Tesla Powerwall 2. Both of these systems offer reliable, efficient, and cost-effective solutions for powering your home or business powered by solar energy. In this article, we will compare and contrast the pros and cons of each system so that you can make an informed decision when selecting your own battery storage solution. 

The Enphase AC Battery System is an ideal option for small-scale applications such as residential homes, due to its relatively low cost and easy installation process. This system combines a solar microinverter with a lithium-ion battery in a single unit that can provide up to 5 kWh of energy storage capacity. The main advantage of the Enphase AC Battery System is its modular design; it allows users to add additional units if they need more capacity over time. Additionally, this system is compatible with other Enphase components such as microinverters, allowing users to combine systems for larger scale implementations. 

One key disadvantage of this system is that it has a lower efficiency rating than some of its competitors; while it offers a good return on investment over time, the initial cost may be higher than other options available on the market. Additionally, unlike some other systems, the Enphase AC Battery System cannot provide backup power during grid outages as it does not include an off-grid mode setting. 

Tesla’s Powerwall 2 is another viable option for those looking for energy storage solutions in Maui. This wall-mounted battery pack stores up to 13.5 kWh (kilowatt-hours) of electricity and integrates with photovoltaic (PV) solar cells on rooftops or elsewhere on properties to store surplus electricity generated throughout the day for use when needed—during peak times or even at night when solar panels aren’t generating any power. 

The primary benefit of Tesla’s Powerwall 2 is its large capacity; while this may mean higher upfront costs initially compared to smaller systems like the Enphase AC Battery System, it also allows users to store larger amounts of surplus energy without needing multiple units or batteries—making it highly efficient in terms of space and overall cost savings in the long run. Additionally, this system includes an off-grid mode setting that allows users to continue receiving power from their stored energy even when there are grid outages due to natural disasters or other causes beyond their control; providing peace of mind during potential emergencies that could leave them without power otherwise. 

However, there are several downsides associated with Tesla’s Powerwall 2; while this unit offers large capacity and off-grid capabilities, some reports suggest that its efficiency ratings are lower than those offered by competitors such as LG Chem’s RESU range—meaning homeowners might not get as much use out of every kilowatt hour stored compared to other options available on the market today. Additionally, since installation requires professional assistance due to safety regulations surrounding lithium-ion batteries used in products like these—the upfront costs could be disproportionately high if professionals need to be consulted frequently throughout set up and usage stages alike. 


Enphase is an industry leader in providing advanced micro inverter technology that unlocks the potential of residential and commercial solar energy systems. They have developed several innovative technologies including their patented AC Batteries, which provide superior energy storage capabilities for any size solar system. Enphase batteries are designed to be highly efficient, easy to install, and cost effective. They come with a 10 year warranty period (which can be extended with an additional 5 years if desired), making them a great choice for long-term reliability and performance. 


  • The Enphase AC Batteries offer superior efficiency over traditional lead-acid batteries due to their higher cycle life ratings. 
  • They are easy to install due to their plug-and-play design that requires no complex wiring or setup process. 
  • Their modular design allows you to easily expand your battery capacity as needed without needing any additional hardware or complicated setup processes. 
  • 10 year warranty means reliable performance over time without needing to constantly replace batteries every few years as is common with lead acid options. 


  • Higher upfront cost than some other battery options available in the market today. 
  • Limited scalability when compared to newer lithium ion based battery solutions on the market today such as Tesla Powerwall 2. 

Tesla Powerwall 2

Tesla’s innovative Powerwall 2 is one of the most advanced residential energy storage solutions available today. It utilizes high-efficiency lithium ion cells capable of storing up to 14 kWh of energy within its sleek modern housing unit making it suitable for both indoor or outdoor installation locations. It also offers time-of-use rate optimization capabilities allowing users to get the most out of their solar production during peak hours when electricity rates are at their highest points for added savings benefits on power bills each month.  


  • High efficiency lithium ion cells offer superior performance compared to lead acid batteries currently used by many homeowners today.     • Sleek modern housing makes it suitable for both indoor or outdoor installations allowing greater flexibility during your installation setup process                • Time-of-use rate optimization capabilities offer added savings benefits by shifting loads away from peak hour pricing periods     • Highly scalable allowing users to add more batteries as needed for increased overall capacities  


  • Higher upfront cost than some other battery options available in the market today    • Installation may require extra investment due technical difficulties associated with different mounting requirements such as earth grounding and load balancing measures     • Limited warranties compared with other lead acid battery solutions on the market today   

Installation From Haleakala Solar & Roofing                                                  

The team at Haleakala Solar & Roofing has extensive experience installing both Enphase and Tesla Powerwall 2 systems throughout all areas surrounding Maui County, Hawaii – from Kihei to Lahaina, Wailuku, Kahului and many more places our technicians can help ensure you get top quality service from start to finish through all stages of your project installation process – from site assessment through completion testing phases – we guarantee our workmanship 100%. Our knowledgeable staff are certified professionals who have been trained and certified on proper safety protocols related to working with electrical components brought about by installing either Enphase or Tesla Powerwall 2 products into an existing infrastructure setup safely without causing harm or damage throughout your property as part of our commitment towards a safe work environment for everyone involved in these projects – no matter how big or small they may be! We also offer excellent customer service guarantees so you can rest assured knowing that whatever happens during installation phases – we’ll always be there ready willing & able assist getting back up & running quickly again!