Solar Home Lighting System Sizing: How Many Watts and Amp-Hours Do You Need?

July 15, 2026

The short answer: most off-grid homes need only a modest solar home lighting kit — four tube lights run three to four hours a night plus phone charging — and the two sizes that cover it cost US$37 or $73 at volume. Picking the right one comes down to two numbers: battery capacity in amp-hours and panel power in watts. Get that balance right and you won’t run out of light early, and you won’t overpay for power you never use.

What to size, and why it flies under the radar

A solar home lighting system bundles a solar panel, a battery, and LED lights (plus a USB port for phones). The two numbers that matter are the battery capacity in amp-hours and the panel power in watts.

The battery decides how many hours of light you get after sunset. The panel decides how fast the battery refills the next day. If the panel is too small for the battery, the system slowly drains across several cloudy days. If the battery is too small for your lighting, the evening runs out early.

How to estimate a household’s need

Count the lights you actually run at night. A typical family lights two or three rooms and maybe an outdoor area. If you’re running four tube lights for three to four hours a night, plus charging a phone, you’re in the range our two main kits cover:

KitPanelBatteryLightsVolumeSingle
Pico Solar 300RX10W6Ah4 × 220-lumen tube + USBUS$37$52
Pico Solar 600RX50W15Ah4 × 220-lumen tube + USB$73$94

The 300RX handles a modest home fine. The 600RX is the one to reach for if bedrooms and the kitchen are lit at the same time, if people stay up later, or if the home is in a region with a shorter, cloudier wet season.

The daylight question

Panel sizing is really a question about your sun. In the Sahel, the Horn of Africa, or the Caribbean dry season, a 10W panel refills a 6Ah battery easily in a day. In a long rainy season, the bigger 50W panel on the 600RX keeps the lights going through stretches of weak sun without the battery slowly draining. If you’re a distributor, this is where you tailor the mix for your territory — and it’s worth carrying both sizes.

When PAYGo changes the math

For customers who can’t pay upfront, the PAYGo version of these same kits unlocks on a payment plan — same hardware, activated by a code as the customer pays:

KitCash versionPAYGo version
300RXUS$37~$59
600RX$73~$118

It converts a $37 or $73 cash problem into a payment your customers can actually manage.

Choosing

SituationKitVolume
One or two rooms, basics only300RX, 6Ah~$37
Three or more rooms, or long evenings600RX, 15Ah~$73
Customers need to pay over timePAYGo version of either$59 / $118

These kits are the foundation of most of the off-grid homes we ship to in Africa, Southeast Asia, and the Pacific. Want to compare the solar home lighting system range and the PAYGo versions, or set up a mixed shipment for your market? Get in touch and we’ll help you size it right.


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