Components

Good pricing on quality cables made-to-order cables and lug sizes.

Quality lugs, choose the size and quantity you need.

This is a great kit to make your own cables if you have a crimping tool.

Fine stranded tinned copper wire with silicone insulation. Great to work with, multiple sizes available.

This is a great assortment of heat shrink tubes, it includes adhesive so it seals very well.

Great set of common lug sizes to have on hand.

Great set of common lug sizes to have on hand.

Assortment of adhesive lined shrink tubing in red, blue, and yellow, with butt, fork, hook, ring, and quick disconnects. Great to have on hand for low voltage wiring.

Great connectors. Good for 60A loads.

Simple low cost connector for standard automotive battery.

If I were doing this project again, this is the unit I would use. It puts out 13.8V which is a better match for most 12V devices. This is a great solution for running 12V devices on your 48V system. It can take an input from 38V to 60V. It is rated for a 30A 414W output.

This is a great solution for running 12V devices on your 48V system. It can take an input from 30V to 60V. It is rated for 20A 240W. Us this one if you need exactly 12V.

Great simple outlet set for 12V systems. USB ports capable of 40W output.

Budget surge protection. If you can't afford the high-end military grade lightening and EMP protection devices, I suggest you at least protect your inverter inputs by adding one of these to each string.

EEMP Shield – Dual 300-420 Volt DC Solar / Wind (Dual-DC-300-420-W)
This unit can protect one or two PV inputs. There are other voltage ranges available if you have a higher or lower voltage string.

EEMP Shield – 48 Volt DC (DC-48V-W) Use this device to protect your 48V Lithium battery bank. There are other voltage ranges available if you have a 12V or 24V system.

EMP Shield – Home EMP & Lightning Protection + CME Defense (SP-120-240-RL / Concealed Model) This unit connects to your breaker panel and provides protection for every device in the home that is plugged in. It comes with a $25,000 insurance policy against lightening damage. This unit has a remote display so the device can be hidden. The non/remote version is slightly cheaper.

Use this model for protecting your home and all devices connected to your homes electrical system.
While cheaper than EMP Shield, I have no reason to believe it won't work just as well.
You can also purchase from Current Connected Here: https://www.currentconnected.com/product/midnite-solar-surge-protection-device-spd/?ref=pwd

Use this model for protecting your battery backup system.
You can also purchase from Current Connected Here: https://www.currentconnected.com/product/midnite-solar-surge-protection-device-spd/?ref=pwd

Use this model for protecting your high voltage solar charge controller.
You can also purchase from Current Connected Here: https://www.currentconnected.com/product/midnite-solar-surge-protection-device-spd/?ref=pwd

I like this breaker the best for PV connections. It doesn't have polarity, the screws are nicely recessed, and it has a clear indicator for off/on. The only negative is it only goes up to 500V

I use this breaker for PV strings that exceed 500V. The screws are not very well recessed, you have to pay attention to polarity, and there is no on/off indicator window.

Use this style fuse block for 12V circuit management.

Only use ANL fuses for 12V systems.

Only use ANL fuses for 12V systems.

Good for small systems. High enough voltage limit for 48V systems.

Holds CNN or ANL fuses. ANL fuses are only good for 12V systems.

Great quality fuse for medium size projects, comes with holder and 2 fuses. Be sure to choose the 58V version for 48V server rack projects.

Fast-blow fuse for very large systems. Prevents dangerous arc-flash.

For smaller battery banks or individual batteries without built in breakers choose the size you need.

If your 48V battery does not have a built in breaker, this is a good choice.

Managing your large battery bank through a dedicated DC breaker gives you more control. This is a ASI NDB1-125C100-2 100 Amp DIN rail circuit breaker, 2 pole, it is rated at 240 Vac, 60 Vdc (This configuration has 2 paired together for 200 amps total).

These are high quality tinned copper cables. UV stability is great. One end is premade so you don't need any tools. They also come with additional MC4 Connectors if you need a connector at both ends.

Great to have on hand, you can get black and red to make your own cables of any length. I recommend 10AWG wire for all solar panel string connections.

This is a great kit with quality connectors. Everything you need to make MC4 connections.

Additional connectors if you have lots of cables to make.

You need UV resistant zip ties or they will break down in a couple of years.

International Connector created this package by my request to provide everything you need for a clean solar combiner box with breakers and surge protectors. I like the DK10N size to give some margin for most installs.

This is my favorite size, it's good for up to 6AWG wire. Use this one if you don't need ground blocks and just want to pass through or combine strings.
Great Connectors for junction boxes and combiner boxes. Multiple sizes available.

This kit is great for creating ground terminals right on the DIN rail without the need for a separate bus bar.
Works with 6-16AWG conductors
Grounds to DIN Rail
Metal Feet

This kit is good for up to 12AWG wire and includes a ground block, jumpers and end stops.
Dinkle UL Listed DIN Rail Terminal Block Kit #1 Red/Black Dinkle 20 DK2.5N 12 AWG Gauge 20A 600V Ground DK2.5N-PE Jumper DSS2.5N-10P End Covers End Brackets

3/4 inch 25ft

Use this for a disconnect for grid-tie connections up to 60A.

This is a great independent transfer switch for switching between mains and generator or solar power.

These enclosures are great for DC combiner boxes. The come in lots of sizes and are very well made for the price. Plus you can get 5% off site wide with the code: VVMH5%OFF

You can also purchase multiple sizes on Amazon. Be sure to purchase the UL listed version for inspection.

Great clips for controlling wires directly to the edge of solar panels.

Great clips for controlling wires directly to the edge of solar panels.
Heyco S6405 SunRunner Stainless Steel Cable Clips (Package of 100)

For joining multiple rails.

Allows you to mount panels right to the edge of the rail and have a clean appearance.

For mounting any microinverter or optimizer to the rail system.

Provides a rail mount point through metal roofing into wood sub structure. Includes flexible rubber seal for flat or slightly curved surfaces.

I used Ready Rack for my ground mount system. It can be installed completely DIY. I have no affiliation with them, but they have a great product.

I have several friends that have used Sinclair's ground mount system. I have no affiliation with them, but they have a great product, it is very clean and the tilt angle can be adjusted. It can be installed DIY, but it is more difficult because it requires deep concrete supports if you don't have the equipment to pound the posts in.