08/28/2026
☀️ If I were building a solar backup system from scratch, I wouldn’t start by buying panels or batteries.
I’d start by understanding how the energy moves through the system.
For beginners, there are four things I think you should understand first:
☀️ 1 — Solar panels create the energy.
But production changes throughout the day depending on sunlight, weather and panel conditions.
⚙️ 2 — The charge controller manages that solar energy.
In my system, the MPPT controllers regulate the solar coming in and send it to my 24V battery bank.
🔋 3 — The battery bank stores the energy.
It lets me store solar energy during the day and use that stored energy later when the sun isn’t available.
⚡ 4 — Your loads determine the system you actually need.
Before worrying about how many panels or batteries to buy, figure out what you need to keep powered, how much energy those loads consume, and how long you need to run them.
The basic idea is simple:
☀️ SOLAR → ⚙️ MPPT → 🔋 BATTERY STORAGE → 🏠 YOUR LOADS
Once you understand that flow, sizing and expanding a system starts making a lot more sense.
Don’t build your system around the equipment you want. Build it around the loads you need to protect.
And remember solar production isn’t guaranteed every day. What happens when solar can’t put the energy back fast enough? That’s where the next layer of my backup plan comes in. 👀⚡
Next, I’ll show you when I decide it’s time to bring in the generator.
💬 If you’re building or planning a solar backup system, what’s the ONE part that confuses you most?