This page contains Amazon affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Cables and connectors are the unsung heroes of any DIY solar power system. They carry current from panels to charge controllers, batteries, and inverters, and the wrong choice can lead to voltage drop, overheating, or even fire. Understanding wire gauge, connector types, and voltage and current ratings is essential before you buy. For a deeper dive into the concepts, see our guide on solar cables, connectors and fuses.
In this comparison, we look at five specific cables and connectors from EcoFlow, RICH SOLAR, ALLPOWERS, and Goal Zero. These products cover a range of uses: extending battery cables, creating custom battery connections, adapting solar panel outputs, and linking power stations to external batteries. While each is designed for a particular brand or system, they illustrate the key factors you should consider for your own setup.
Every specification on this page comes from the manufacturer’s own product page, checked on 1 November 2026. We have not used these products ourselves, so the picks are based on published specifications only.
For more background, read our solar cables, connectors and fuses overview and the DIY solar system components guide.
How we chose these
- Connector Compatibility Ensure the plug or port matches your solar panel, charge controller, or power station input.
- Wire Gauge and Current Capacity Thicker wire (lower AWG) handles more current with less voltage drop; check your system’s maximum amperage.
- Length and Voltage Drop Longer cables increase resistance; choose the shortest length that reaches, and consider the gauge for longer runs.
- Voltage and Environmental Ratings Look for a voltage rating above your system’s maximum and weather resistance if used outdoors.
Always verify the manufacturer’s specifications for your specific components before purchasing any cable or connector.
Comparison table
| Product | Type | Connector Ends | Wire Gauge | Length | Max Voltage / Current | Key Feature |
|---|---|---|---|---|---|---|
| EcoFlow Extra Battery Connector | Connector | Not stated | Not stated | Not stated | Not stated | Extends battery cable up to 15 m |
| RICH SOLAR Energy Storage Connector | Connector | Positive/negative plugs | Not stated | Not stated | 1500 V DC / 120 A | IP67, snap-lock, flame-retardant |
| ALLPOWERS Solar Extension Cable | Cable | Solar panel plug to DC 5.5×2.1mm & 3.5×1.35mm | 16 AWG | 1.5 m | Not stated | Includes multiple DC tips |
| Goal Zero Ring Terminal Cable | Cable | SB175 to ring terminals | 4 AWG | 24 in | Not stated | For semi-permanent battery connection up to 175 A |
| Goal Zero Battery Clamp Cable | Cable | SB175 to battery clamps | 4 AWG | 36 in | Not stated | For temporary battery connection up to 175 A |
Specs are as stated by each maker. ‘Not stated’ means the information was not provided in the product listing.
1. EcoFlow Extra Battery Cable Connector: for extending EcoFlow battery cables between power stations and generators
EcoFlow says this connector extends the Extra Battery Cable when connecting a DELTA Pro 3, a DELTA Pro, a DELTA 2 Max, or a DELTA 3 Plus to a Smart Generator 4000 (Dual Fuel) or a Dual Fuel Generator. It supports a maximum total extension of 15 meters by connecting up to three 5-meter Extra Battery Cables. The maker notes that going beyond this length may cause functional issues. For a deeper look, DIY Solar Powered Light: Step-by-Step Build Guide for Beginners covers this in detail.
- Supports up to three 5 m Extra Battery Cables (EcoFlow).
- Specifically designed for DELTA Pro series and Smart Generator 4000 (EcoFlow).
Pros: Allows extension up to 15 m; simple inline connector.
Cons: Only compatible with specific EcoFlow power stations and generators; no voltage or current rating stated.
2. RICH SOLAR Energy Storage Connector: for custom cable connections to ALPHA 5 PRO battery
RICH SOLAR describes this as an energy storage connector designed for building custom cables for the ALPHA 5 PRO battery. The maker says it handles 1500 V DC and 120 A, with different positive and negative pin sizes to prevent reverse connection. The connector features an IP67 rating when mated, a flame-retardant housing, and snap-lock installation. We also found 5 Best Solar Charging Station DIY Kits and Builds Compareds useful on this point.
- Contact resistance ≤ 0.5 mΩ (RICH SOLAR).
- Operating temperature range -40°F to 257°F (RICH SOLAR).
- UL, CE & RoHS certified (RICH SOLAR).
Pros: RICH SOLAR says it handles 1500 V DC / 120 A; IP67 weather protection; reverse-connection prevention.
Cons: Requires custom cable assembly; designed only for ALPHA 5 PRO battery.
3. ALLPOWERS Solar Extension Cable with 5521 Connectors: for connecting solar panels to solar generators
ALLPOWERS offers this 16 AWG solar extension cable with a length of 1.5 meters. One end has a solar panel plug (male or female), and the other provides DC 5.5 mm x 2.1 mm and 3.5 x 1.35 mm connectors, with an included DC 5.5 mm x 2.5 mm adapter. The maker states it is universal for solar panel kits with solar connectors and can connect ALLPOWERS 100 W and 50 W panels to a solar generator.
- Includes DC 5.5 mm x 2.5 mm connectors (ALLPOWERS).
- Flexible and easy to store (ALLPOWERS).
Pros: Includes multiple DC tips for different devices; flexible 16 AWG cable.
Cons: Length limited to 1.5 m; no voltage or current rating stated.
4. Goal Zero Yeti 1250 Ring Terminal Connector Cable: for semi-permanent connection to a 12V lead-acid battery
Goal Zero says this cable semi-permanently connects a Yeti 1250 to a 12 V lead-acid battery of up to 175 A for longer run times. It uses red and black bonded 4 AWG cable with a High Power Port SB175 input and tinned copper ring terminals. The cord length is 24 inches.
- Output: 4 AWG copper (tinned) ring terminal (Goal Zero).
- Used with Goal Zero Yeti 1250 (Goal Zero).
Pros: Heavy 4 AWG gauge for high current; ring terminals provide secure semi-permanent connection.
Cons: Only for Yeti 1250; length fixed at 24 in. You may also like 7 Best Solar Hot Tub Heater DIY Kits and Parts for Every Need.
5. Goal Zero Yeti 1250 Battery Clamp Connector Cable: for temporary connection to a 12V lead-acid battery
Goal Zero describes this cable for temporarily connecting a Yeti 1250 to a 12 V lead-acid battery (up to 175 A) to share power. It features red and black bonded 4 AWG cable, an SB175 input, and battery clamps. The cord length is 36 inches. 10 Best DIY Portable Solar Power Generator Options for Camping and Backup (2026) goes further into this.
- Output: battery clamps (Goal Zero).
- Cord length: 36 in (91.4 cm) (Goal Zero).
Pros: Heavy 4 AWG gauge; clamps allow quick temporary connection.
Cons: Only for Yeti 1250; length fixed at 36 in.
Which one fits you
| Your situation | Look at | Why |
|---|---|---|
| You need to extend an EcoFlow battery cable between a power station and generator | EcoFlow Extra Battery Connector | Supports up to 15 m total extension with up to three 5 m cables. |
| You need a high-current DC connector for a battery bank | RICH SOLAR Energy Storage Connector | RICH SOLAR rates it for 1500 V DC / 120 A, IP67, and flame-retardant housing. |
| You need an extension cable for a portable solar panel | ALLPOWERS Solar Extension Cable | 16 AWG, 1.5 m, with multiple DC connector tips. |
| You want to connect a Goal Zero Yeti 1250 to a lead-acid battery | Goal Zero Ring Terminal or Battery Clamp Cable | 4 AWG cables with SB175 input; choose ring terminals for permanent or clamps for temporary use. |
Practical tips
- Match the connector type to your solar panel or power station’s input; MC4, DC barrel, and SB175 are common in DIY solar.
- Select a wire gauge that can safely carry your system’s current; for example, Goal Zero uses 4 AWG for up to 175 A connections.
- Consider cable length carefully; longer runs increase voltage drop, so keep cables as short as practical.
- Check the voltage and current ratings of connectors to ensure they meet your system’s maximums, as seen with the RICH SOLAR connector rated for 1500 V DC / 120 A.
FAQ
What wire gauge should I use for a high-current solar battery connection?
Goal Zero uses 4 AWG cable for its Yeti 1250 battery connector cables, which are intended for batteries up to 175 amps. For lower currents, a thinner gauge may be sufficient.
Can I extend the cable between my EcoFlow power station and generator?
EcoFlow offers an Extra Battery Cable Connector that supports up to 15 meters of extension using up to three 5 m Extra Battery Cables. The maker warns that exceeding this length may cause functional issues.
Are these connectors weather-resistant?
The RICH SOLAR Energy Storage Connector has an IP67 rating when mated, meaning it is protected against dust and temporary immersion. Other connectors may not state a weather rating, so check the maker’s specifications.
What is the difference between the Goal Zero ring terminal and battery clamp cables?
Both use 4 AWG cable and an SB175 input for the Yeti 1250. The ring terminal version is for semi-permanent connection, while the battery clamp version allows temporary hookups without tools.
Sources
Specifications from each manufacturer’s product page, checked 1 November 2026: EcoFlow Extra Battery Cable Connector, RICH SOLAR Energy Storage Connector, ALLPOWERS Solar Extension Cable with 5521 Connectors, Goal Zero Yeti 1250 Ring Terminal Connector Cable, Goal Zero Yeti 1250 Battery Clamp Connector Cable. Makers can change specifications; check the product page before you buy.
