The Complete Guide to Solar Monitoring for Static Caravans

A static caravan with solar power is brilliantly simple: a panel on the roof, a charge controller, a battery, and a few loads. No moving parts, minimal maintenance, and free electricity from the sun.

Until something goes wrong and you’re not there to notice.

Static caravans have a unique challenge that motorhomes and campervans don’t: you’re not always present. The caravan sits in a field or on a site, running autonomously. Days, weeks, sometimes months go by between visits. And during that time, you have no idea what your solar system is doing.

This guide covers everything you need to know about monitoring a static caravan solar system remotely.

Why Static Caravans Need Monitoring

The “I’ll check it when I visit” problem

With a motorhome, you’re there. You can look at the charge controller, check the battery voltage, listen to the fridge. If something’s wrong, you notice immediately.

With a static caravan, the failure modes are silent:

• Battery slowly draining over a week of cloudy weather — you arrive to a dead battery
• Charge controller fault — PV not charging, battery depleting with no solar input
• Fridge running constantly — compressor stuck on, draining 4x normal power
• Router offline — security cameras and remote access lost
• Rodent damage to wiring — intermittent connections causing charging failures

Without monitoring, you discover these problems when you visit. By then, the battery might be dead, the food spoiled, and the damage done.

What to Monitor

Essential (Must Have)

Valuable (Nice to Have)

Critical (Game-Changer)

Monitoring Options for Static Caravans

Option 1: No Monitoring (Free)

The default. You visit, check things manually, hope for the best.

Risk level: High. You won’t know about problems until you visit. A dead battery in winter might sit for weeks before you find it.

Option 2: WiFi Camera on Battery Display (30-50)

Point a cheap WiFi camera at your charge controller’s LED display or an MT50 screen. Check the camera feed remotely.

Pros: Cheap, works with any controller. Cons: Hard to read LEDs from a camera. No historical data, no alerts, no automation. Camera itself draws power. Doesn’t work if WiFi/internet goes down.

Option 3: EPEVER eBox-WiFi (40)

If you have an EPEVER controller, this plugs in and gives you app-based monitoring.

Pros: Cheap, easy to install. Cons: The app is unreliable. No battery protection. No overnight estimate. No historical data. Frequently goes offline. Read our detailed comparison

Option 4: DIY with Raspberry Pi / ESP32 (30-80)

Build a custom monitoring system with Home Assistant.

Pros: Maximum flexibility, unlimited data retention, powerful automations. Cons: Requires significant technical skills. Raspberry Pi draws 3-5W continuously (significant in a solar system). Reliability depends on your build quality. No support if it breaks.

Option 5: Helikeep (75)

Purpose-built for this exact use case.

Pros: Plug-and-play setup (5 minutes), automatic battery protection, overnight estimate, remote dashboard, alerts, minimal power draw (deep sleep between readings), automatic firmware updates. Cons: Requires WiFi at the site. Currently supports EPEVER controllers (more coming soon).

The WiFi Question

All remote monitoring options require internet at your caravan. Common solutions:

Mobile Router (Most Common)

A 4G/LTE router with a SIM card. Many caravan owners already have one for security cameras or general internet access.

• Power draw: 1-3W (can run from charge controller’s LOAD output)
• Cost: 30-50 for the router + 5-15/month for a data SIM
• Helikeep data usage: Minimal — a few KB every 14 minutes. A 1GB/month SIM is more than enough

Site WiFi

Some caravan parks provide WiFi. Quality varies enormously. If it’s reliable enough for a video call, it’s more than enough for Helikeep.

Starlink (Overkill but Works)

If you’re truly remote and need reliable internet, Starlink works. But at 40+/month, it’s probably overkill just for solar monitoring.

Setting Up Remote Monitoring: A Checklist

1. Ensure you have internet at the site (mobile router, site WiFi, or Starlink)
2. Check your charge controller model for compatibility (check here)
3. Install the monitoring device (connect to RS485 port, connect to WiFi)
4. Verify remote access from your phone/computer before leaving the site
5. Set up alerts so you don’t need to check the dashboard constantly
6. Configure battery protection thresholds for your battery type
7. Test load shedding — manually trigger it once to confirm it works

What Good Monitoring Looks Like in Practice

Here’s what monitoring a static caravan with Helikeep looks like day-to-day:

Normal Day

You don’t look at the dashboard at all. Helikeep is working silently, recording data, protecting your battery. No alerts means everything is fine.

Before a Visit

Check the dashboard to see battery status. Is the battery healthy? Has the fridge been running? Any alerts in the last week?

Cloudy Spell

You get an alert: “Battery approaching load shedding threshold.” You check the overnight estimate — it says the battery will last until 4 AM. You know Helikeep will cut the load at 12.1V, protecting the battery. When the sun returns, the load will come back automatically.

You don’t need to drive to the caravan. You don’t need to do anything. The system handles it.

Season Change

Look at the historical charts. Is generation dropping as winter approaches? Is consumption increasing (fridge working harder in summer)? Time to adjust your expectations or loads.

The Bottom Line

A static caravan solar system without monitoring is like a car without a dashboard — it works until it doesn’t, and you won’t know there’s a problem until it’s too late.

For 75 (one-time) and 5 minutes of setup, Helikeep gives you eyes on your system 24/7, automatic protection when things go wrong, and the peace of mind that your caravan’s battery is healthy — whether you visited yesterday or a month ago.

Monitor your caravan remotely with Helikeep — plug-and-play solar monitoring for static caravans.