Build Your Own Power Box
Build your power box
Grab a starter pack, pick a ready-made unit, or build your own: the size, the battery, solar or no solar, and the add-ons. Add batteries any time. Every box comes with a 5-year warranty, and if we install it, we come to you for service. You see the price as you go, and how it stacks up against the big brands.
Ready-made units
Tap one to load it, then change anything you want below.
Standard features
Style
Power
How much it can run at once. Bigger sizes add 240V for well pumps, mini-splits and shop tools.
Battery
Lithium (LiFePO4) packs we build and test here. Thousands of charge cycles, safe chemistry.
Solar
Add-ons
Pick only what you want. Everything in Standard features is already included.
Pick your color and outlet layout when we talk. No charge.
How you get it
We come out to your place for installs. Everything else is picked up at our shop or shipped.
Warranty
Have us install it and your 5-year warranty comes with on-site service, so we come to you if anything needs fixing. Installs are quoted after we see the site.
How it compares
Your build next to the big names. Their prices are from their own stores in November 2026 and change with sales.
| Unit | Battery | Power | Price | Per kWh | Cost per kWh |
|---|
Add-on batteries: ours vs theirs
Already have one of our boxes, or want more later? Our add-ons plug right in. Their prices are from their stores and dealers in November 2026.
| Add-on battery | Battery | Fits | Price | Per kWh | Cost per kWh |
|---|---|---|---|---|---|
| Ours, 12V | 4 kWh | Minis | $1,099 | $275 | |
| Ours, 24V | 8 kWh | 4,000 W boxes and kits | $1,999 | $250 | |
| Ours, 48V | 16 kWh | 7,200 W and bigger | $3,449 | $216 | |
| Bluetti B500K | 5.1 kWh | Bluetti Apex 300, AC300 | $1,599 | $312 | |
| Bluetti B300K | 2.8 kWh | Bluetti AC200L, AC300 | $1,099 | $397 | |
| EcoFlow Delta 3 Max Plus extra battery | 2 kWh | EcoFlow Delta 3 | $859 | $419 | |
| EcoFlow Delta Pro 3 extra battery | 4.1 kWh | EcoFlow Delta Pro 3 | $1,899 | $464 | |
| Jackery Battery Pack 5000 Plus | 5 kWh | Jackery Explorer 5000 Plus | $2,599 | $516 |
We build the battery packs ourselves from new grade-A cells, so you get more stored power per dollar.
If something fails, bring it to our shop in Valle Vista and we fix it here. If we installed it, it’s covered for 3 years, or 5 with the upgrade, and we come to you.
Your outlets, your color, a generator hookup, and solar that takes long panel strings.
EcoFlow, Bluetti, Jackery and Anker are trademarks of their owners. We’re not connected with them.