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Battery systems will store the energy your solar panels create. Build a better energy system for security, sustainability, and peace of mind.

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Get your free quote on how to integrate energy storage systems with solar in your home or business.


Battery storage for excess solar energy to save you money and worry.

We design, engineer, and install battery systems to build your capacity to store the energy your solar panels make.

How Does it Work?

A battery storage system saves your solar energy to be used at a later time. The more batteries you have the more capacity to store energy. When your battery is full your excess solar energy will go back to the utility, and when your battery is low the grid will supply your energy need and even charge your battery if necessary.

Agathon Solar offers solar backup power to our Michigan solar customers. We install long-lasting dependable solar batteries. Batteries do have an initial start-up cost, but will in the long run out perform noisy and polluting generators. We install all types of battery technologies.

Agathon Solar has researched the top solar backup power system brands and we recommend a battery like the Fortress Power Lithium Iron Phosphate (LFP) over the Nickel Manganese Cobalt (NMC) batteries offered by Tesla and Generac. This video outlines the differences between the technologies.

LFP (Lithium Iron Phosphate) Advantages over NMC (nickel-manganese-cobalt)
Cycle Life

LFP has a higher cycle life, 6,000 or more with an 80 to 90% depth of discharge (DOD).


LFP chemistry is not nearly as subject to thermal run off which can cause fires in battery products.


Manufacturing process with LFP is much cleaner while Generac and Tesla both use NMC chemistry that has Cobalt. The mining process for cobalt is far from green and has some other questionable activities to get it from the earth.

End of life

Most of the components in an LFP battery will be able to be recycled at the end of its service life. This is not the case with NMC primarily because of the cobalt.

Overall the LFP battery is superior to either the Tesla or Generac battery. This video illustrates the above very clearly.

Installed Cost
Energy Throughput
Retention Capacity

eVault 12kW/18.5kWh

Cost per kWh 29¢

10 years


70% at 10 years
Following Initial Installation Date

2x Powerwall 5kW/13.5kWh

Cost per kWh 35¢

10 years


70% at 10 years
Following Initial Installation Date