LG Chem Battery
|Capacity (usable)||9.3 kWh|
|Max Output||5 kW continuous / 7 kW peak|
|Max amps of backup circuits||24 amps|
|Dimensions||35.7”H x 29.3”W x 8.1”D|
|Warranty||10 Years / 60% Capacity Retention|
|Cost (before incentives)||$9,000-$11,000|
LG Chem Basics
LG is one of the leading companies in the solar and home battery industry. While lots of homeowners are familiar with LG’s electronics and home appliances, fewer are aware of the industry-leading solar and battery products that LG offers.
LG Chem, a subsidiary of parent company LG, has extensive experience manufacturing lithium ion batteries. LG Chem supplies battery packs for some of the most popular electric vehicles in the world, including the Chevy Bolt. The LG Chem RESU 10H is the company’s best battery to date, and it offers a compelling alternative to other options like the Tesla Powerwall.
The LG Chem provides all the standard advantages of solar batteries, including backup protection against grid outages, time-of-use load-shifting, and greater energy independence. See our solar battery home page for a thorough review of these functions. LG has recently upgraded their software capabilities, and their batteries offer great visualizations and customizations to homeowners.
Unlike the Tesla Powerwall, the LG Chem is a DC battery. One of the biggest advantages of a DC battery is that it has better round-trip efficiency than an AC battery. In other words, less energy is lost when the battery is charged and discharged than with an AC battery, since some power is lost to heat when DC power is inverted to AC.
Being a DC battery also means that the LG Chem requires a particular inverter that allows it to pass through DC power from the solar panels directly into the battery. The best of these inverters on the market today is the SolarEdge StorEdge, which provides a single-inverter (DC-coupled) solution for both a solar PV system and a home battery, reducing energy loss and overall system costs. You can read more about solar inverters here.
Importantly, this means that many inverters will not be compatible with the LG Chem RESU 10H, including all microinverters. As a result, DC batteries like the LG Chem are more difficult to retrofit to existing solar systems, as doing so requires replacing the existing solar inverter. If the existing system uses microinverters, then it won’t be possible at all. Consult with your installer to make sure your proposed equipment is compatible.
Being a DC battery also means that the LG Chem’s output cannot stack, so the system’s output is limited to 24 amp circuits and below, even with multiple batteries. Therefore, while buying two batteries will increase the system’s backup duration in an outage, it will not increase the amperage of the circuits that can be backed up. This isn’t necessarily a bad thing – if you know that you only want to back up basic essentials, then the LG Chem can be a great solution!
The LG Chem is also passively cooled, as opposed to some other options like the Tesla Powerwall that are liquid-cooled. As a result, the thermal management in the LG Chem isn’t quite as strong, so it’s best to have this battery installed inside a garage and/or out of direct sunshine and heat. That said, LG’s batteries are extremely reliable and well-made, so it will still meet homeowners’ needs just fine.
Finally, we come to the LG Chem’s biggest competitive advantage – price. The LG Chem RESU 10H typically runs about $9,000-$11,000, fully installed. That includes all of the ancillary components needed to make the battery function – see our article on solar battery pricing for more information about the factors that contribute to battery pricing.
Given that the Tesla Powerwall typically runs about $12,000-$14,000, the LG Chem can undercut Tesla’s pricing by 20-30%. While it does have less capacity (9.3kWh vs. 13.5kWh), it will still meet most homeowners’ backup and load-shifting needs just fine, and do so at significantly lower cost than the Tesla Powerwall. This pricing makes it the most affordable mass-market solar battery in the industry, so for the value-oriented shopper, the LG Chem is a standout option!
If homeowners buy multiple batteries at the same time, installers will typically reduce the cost of the subsequent batteries, since some of the equipment can be economized. If installed with solar, homeowners can also claim the same 26% federal tax credit they’re getting for their solar system, as well as additional state and local incentives like California’s SGIP program.
Overall, the LG Chem is one of the best solar battery options in the entire industry. LG Chem is one of the largest lithium-ion battery producers in the world, so their products are extremely vetted and manufactured to the highest standards. The pricing on the RESU 10H also undercuts every competitor by a significant margin, so from a value perspective, LG’s offering is unbeatable.
Feel free to schedule a call with one of our Energy Advisors to see LG Chem pricing from verified installers in your area!