Power still goes out
Many older solar systems were installed without backup. When HECO goes down, the panels shut off too — even on a sunny day.
Existing System Specialists
Already have solar? Let's make it backup-ready.
Adding a battery to an older solar system is not as simple as mounting a box on the wall. We assess your current equipment, check compatibility with modern battery technology, and size the solution so your battery actually charges — and your home stays on when the grid goes down.
- Compatibility-first assessment
- Right-sized battery design
- Works with some existing inverters
- Local Hawaii service team
Why this needs an expert
It is more than attaching a battery and calling it good.
Your older equipment has to be compatible with newer technologies, and your system has to be sized right in order to fully charge the battery.
Compatibility matters
Your inverter, monitoring, and existing wiring have to play nicely with modern battery technology. Not every system is a simple add-on.
Sizing is everything
An undersized solar array cannot fully charge a battery. We size the backup to your actual production and usage — not just sell you a box.
How it works
Three steps to see if your old system qualifies.
1
Send your bill or proposal
Provide your most recent electric bill or your original solar proposal and production report. This tells us what your system actually produces versus what you use.
2
We assess compatibility
Our team reviews your inverter model, panel layout, and electrical setup to determine whether a battery can be added safely and effectively.
3
Design the right backup
If your system can support it, we size and specify a battery solution that charges reliably — and keeps your essential circuits running during outages.
Our commitment
We will not sell you a battery you cannot charge.
As subject matter experts, it would not be very ethical of us to sell you a battery that your existing solar array cannot keep full. We take the time to thoroughly explore different options for you — including upgrades, replacements, or hybrid solutions when an add-on is not practical.
Right-sized
Battery to your array
Honest
Compatibility assessment
Local
Hawaii service team
Ethical
No unchargeable batteries
See if your old solar system qualifies.
Send us your latest electric bill or previous solar proposal and production report. We will tell you if your existing system is ready for battery backup — and the most cost-effective way to get there.