Your battery will never die overnight.
Helikeep is a plug-and-play solar monitor that watches your battery 24/7 and automatically cuts power to non-essential loads before damage occurs. Monitor your caravan, cabin, or off-grid system from anywhere in the world.
Key Features
Everything you need to protect your off-grid battery
Automatic Battery Protection
Monitors your battery voltage and automatically disconnects non-essential loads when voltage drops too low. When the battery recovers, power is restored automatically.
Real-Time Monitoring
See everything your solar system is doing: panel voltage and power, battery voltage and state of charge, load consumption, controller temperature. Updated every 14 minutes.
Battery Overnight Estimate
The dashboard shows exactly how long your battery will last at the current draw. "Your battery will last until 6:42 AM" — so you know whether to worry or relax.
Smart Alerts
Get notified when your battery is low, when load shedding activates, when the device goes offline, or when temperatures are abnormal.
Works Without Internet
Built-in local web interface accessible on your WiFi network. Battery protection works even without an internet connection.
Automatic Updates
Firmware updates delivered over-the-air. No manual flashing, no USB cables. Your Helikeep always has the latest features.
How It Compares
Victron quality at 1/20th the price
The sweet spot for budget MPPT controllers
| Feature | EPEVER eBox-WiFi ~€40 | HeliKeep ~€75 | Victron Cerbo GX ~€1,500+ |
|---|---|---|---|
| Remote monitoring | Poor app | Web + local UI | Excellent (VRM) |
| Auto load shedding | No | Yes | With extra hardware |
| Overnight estimate | No | Yes | No |
| Email/webhook alerts | No | Yes (PRO) | Yes |
| Historical data | None | 30d free / 1yr PRO | Unlimited |
| Multi-controller | EPEVER only | EPEVER, SRNE, Renogy, PowMr | Victron only |
| Local web interface | No | Yes | Yes |
Set up in 3 simple steps
Step 1: Plug In
Connect Helikeep to your charge controller's RS485 port with the included cable. No tools, no wiring, 30 seconds.
Step 2: Connect WiFi
Power on, connect to the Helikeep hotspot from your phone, select your WiFi network. Done.
Step 3: Monitor From Anywhere
See real-time battery voltage, solar generation, and load consumption from your phone or computer. Get alerts when something needs attention.
Done!
What users say
" I installed Helikeep on my static caravan and forgot about it. Two weeks later I got an alert that the battery was getting low after three cloudy days. The router was already shut off automatically. When the sun came back, everything recovered on its own. "
Beta tester
UK
" As an installer, I was spending hours on the phone with customers asking 'is my battery OK?' Now I just send them the Helikeep link and they can check themselves. Saved me at least 5 hours a week. "
Solar installer
Romania
" The overnight estimate is genius. I check it before bed and know exactly if I need to turn anything off. Usually I don't — Helikeep handles it. "
Off-grid cabin owner
Germany
Stop worrying about your off-grid battery.
One-time purchase. Free cloud dashboard included. No subscription required.