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The lights go out at dinner time and the fridge hums its last, so a backup plan starts to look less like a hobby and more like a household need. Do it yourself home solar panel kits answer that need by bundling panels, a charge controller, cables and mounting hardware in a box you assemble yourself. The kit charges a battery bank from sunlight, and the battery runs your loads through an inverter or straight from the battery. This guide walks through what a kit holds and what to check in the listing before you buy.
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The quick answer
A kit is a matched set: panels to catch sunlight, a charge controller to feed the battery, cables to join the parts and brackets to hold the panels. The listings cited here span a 30W maintainer kit for a 12V battery, a 100W kit with a 30A controller, and a 5kWh kit with six 100W panels and four 12V 100Ah batteries. Pick the size from the loads you plan to run and the battery you plan to charge, then check the panel voltage and controller amps against the battery. See the DIY solar panel kit guide for what to buy and what to know.
The table below lines up the three listings cited in this guide.
| Kit | Panels | Controller | Battery | In the box |
|---|---|---|---|---|
| SOLPERK 30W maintainer kit | 30W panel, 12V | MPPT controller | Charges 12V batteries | 360-degree adjustable bracket |
| Topsolar 100W kit | 100W panel, 12V | 30A PWM controller | Expands to 260W at 12V or 520W at 24V | Four Z-brackets and solar cables |
| ExpertPower 5kWh kit | Six 100W panels, 600W | 40A MPPT controller | Four 12V 100Ah LiFePO4 batteries | 3000W inverter charger and 30A DC-DC charger |
Other kits list different figures, so compare the listing in front of you with the loads you plan to run.
See what a kit holds
Every kit in this guide holds the same kinds of parts, in different sizes. The panels catch sunlight, the charge controller sits between the panels and the battery and keeps the battery from overcharging, and cables and brackets join the parts and hold the panels in place. The SOLPERK kit (on Amazon) holds a 30W panel, an MPPT controller and a 360-degree adjustable bracket, and it is built to charge and maintain 12V batteries. The Topsolar kit (on Amazon) holds a 100W panel, a 30A controller, a pair of solar cables and four Z-brackets. The ExpertPower kit (on Amazon) holds six 100W panels, a 40A MPPT controller, a 30A DC-DC charger, a 3000W inverter charger and four 12V 100Ah batteries.
Match panel watts and voltage to the controller
The controller has to accept what the panels produce, so compare the panel watts and voltage with the controller figures. The Topsolar panel lists voltage at maximum power of 23V and current at maximum power of 4.3A, and its 30A controller takes 12V or 24V systems. The same kit expands to a maximum of 260W on a 12V system or 520W on a 24V system. The ExpertPower kit pairs six 100W panels with a 40A MPPT controller, and the maker claims MPPT tracking lifts array output by over 20% compared with PWM. The SOLPERK kit pairs a 30W panel with an MPPT controller for a 12V battery. See the solar charge controller size guide before you pick a controller size.
Size the battery bank to the loads
Battery size is listed in watt-hours or amp-hours, so start from the loads you plan to run. The ExpertPower kit holds four 12V 100Ah LiFePO4 batteries, a 5kWh bank, with a stated life of 2500 to 7000 cycles and 10 years. The same kit supports expansion up to four batteries in series at 48V 100Ah, or in parallel at 12V 1000Ah. Its battery management system guards against overcharge, deep discharge, overloading, overheating and short circuit, with a low-temperature cut off below 23°F. The SOLPERK kit is a maintainer, not a bank: it charges and maintains a 12V battery. See how long a LiFePO4 battery lasts for what cycle life means in practice.
Check cables, mounts and build
Cables, mounts and the panel frame decide how the kit holds up outside. The ExpertPower kit includes one pair of 20ft 10AWG panel-to-controller cables and one pair of 6ft 8AWG controller-to-battery cables, a Y branch adapter and six sets of mounting brackets. The Topsolar kit includes four Z-brackets and a pair of red and black solar cables. The SOLPERK panel uses low-iron tempered glass and a corrosion-resistant aluminum frame, and the listing states it handles wind pressures up to 2400Pa and snow loads up to 5400Pa. The SOLPERK panel measures 12.0 by 8.0 by 1.0 inches.
Do it yourself home solar panel kits: what to check before you buy
Before you buy, read the do it yourself home solar panel kits guides on this site and work through the checks below.
- Panel watts and voltage: check the watts and the voltage at maximum power against the controller figures.
- Controller type and amps: note whether the controller is MPPT or PWM and its amp figure, and check it takes your battery voltage.
- Battery size and chemistry: check the watt-hours or amp-hours, the battery chemistry and the stated cycle life.
- Cables and mounts: check the cable lengths and gauges, the brackets in the box, and the frame and glass.
- Warranty and support: check whether the listing states a warranty term, and read the manual for the kit you buy.
- Home wiring: a licensed electrician should install any part of a kit that connects to home wiring.
FAQ: power away from the grid
Can a 30W solar kit run a fridge?
No, not as a power source. The SOLPERK 30W kit is a charger and maintainer for a 12V battery. A fridge needs a battery bank and an inverter sized to its draw, such as the 5kWh ExpertPower kit with a 3000W inverter charger.
What does a 100W solar panel kit include?
The Topsolar 100W kit includes a 100W panel, a 30A charge controller with PWM, a pair of solar cables and four Z-brackets. It is built for 12V battery charging in RVs, cabins, homes and boats.
How long do the batteries in a solar kit last?
The ExpertPower LiFePO4 batteries list 2500 to 7000 cycles and a stated life of 10 years, with a battery management system and up to 1 year of maintenance-free storage.
Can I expand a solar panel kit later?
It depends on the kit. The Topsolar kit expands to a maximum of 260W on a 12V system or 520W on a 24V system, and the ExpertPower kit supports expansion up to four batteries in series at 48V 100Ah or in parallel at 12V 1000Ah.
Do I need an electrician for a DIY solar kit?
The kits cited here are listed for RVs, cabins, boats and off-grid use. Any part of a kit that connects to home wiring should be installed by a licensed electrician, and the manual governs the rest.
Related solar guides
See the Solar Panels and Kits guides, the DIY solar panel kit guide, the solar charge controller size guide and the LiFePO4 battery life guide.
