125A 2-Pole DC Breaker (1000V)
DC-rated DIN-rail breaker used as a disconnect and over-current protection between the batteries, charge controller and inverter.
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Cables & Connections
Breakers, fuses, bus bars, connectors and wire — the parts that keep it safe.
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Breakers/Fuses
32A 2-Pole DC Breaker (1000V)
DC-rated DIN-rail breaker sized for solar strings — a safe way to disconnect and protect each PV input.
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300A Class T Fuse with Block
Class T fuses can safely interrupt the huge short-circuit current a lithium battery can deliver. This one goes right at the battery's positive terminal.
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200A Class T Fuse with Block
Same high-interrupt protection as the 300A version, sized for smaller banks or individual battery strings.
See it in a videoVictron Lynx Class-T Power In (M10)
A Lynx bus bar with Class-T fuse holders built in, so each battery gets proper high-interrupt protection right at the bus. This is what I used to expand my battery bank.
See it in a videoBlue Sea Class-T Fuse
Replacement Class-T fuses for the Lynx Class-T Power In or a standalone fuse block.
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Chtaixi 25A 2-Pole DC Breaker (1000V)
DIN-rail DC breaker used as the per-string disconnect inside my PV junction box.
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2-Pole DC Surge Protection Device
DIN-rail surge arrester that shunts lightning-induced spikes on the PV lines to ground before they reach the charge controllers.
See it in a videoMidNite Solar Surge Protection Device (SPD)
MidNite's surge protector for PV, DC or AC circuits, with an indicator that shows when it has taken a hit.
See it in a videoSiemens 60A 2-Pole Non-Fusible Safety Switch
Outdoor-rated 240V disconnect that gives you a visible, lockable way to isolate a circuit.
See it in a videoBus Bars
Victron Lynx Power In – Power Distribution System 1000 Amps
1000A modular bus bar that joins multiple batteries to a common positive and negative, with LED indicators. Bolts directly to other Lynx modules.
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Victron Lynx Distributor – Power Distribution System 1000 Amps
1000A bus bar with four fused outputs (MEGA fuses) and blown-fuse indicators — a clean, protected way to feed inverters and chargers.
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250 Amp Bus Bars
Common connection point for multiple cables on the positive or negative side, so you're not stacking lugs on a battery terminal.
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300A Bus Bars
Heavier-duty bus bars for joining several high-current cables at one point.
1/4″ Single-Stud Junction Posts
Insulated junction posts for joining a few cables or passing a connection through a panel.
See it in a videoConnectors
2 AWG Tinned Copper Lugs (3/8″)
Tinned copper ring lugs for 2 AWG cable. The tin plating resists corrosion over time.
See it in a video2/0 AWG Marine-Grade Ring Lugs with Heat Shrink
Heavy ring lugs for 2/0 battery cable, with adhesive heat shrink to seal each connection.
Wire Ferrule Kit (2–16 AWG)
Crimp-on ferrules for stranded wire going into screw or clamp terminals. They keep strands from splaying and help the terminal hold tight.
See it in a videoBougeRV MC4 Connectors (22 Pairs, 10 AWG)
Waterproof MC4-style connectors for building and extending solar panel cables, with spanners for tightening and unlocking them.
See it in a videoSolar Panel Bolt-On Ground Lugs (5-Pack)
Bolt-on lugs for bonding panel frames and racking to the equipment ground.
See it in a videoMorris Insulated Multi-Cable Connector (2/0–6 AWG)
Insulated, three-port splice block. A tidy way to join or tap large conductors without a bus bar.
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Dinkle DIN-Rail Terminal Block Kit
Screw-down terminal blocks that snap onto DIN rail, for neat landing points inside an enclosure.
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Slotted Aluminum DIN Rail (12″, 2-Pack)
Mounting rail for breakers, terminal blocks and surge protectors.
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UL-Listed 10 AWG Wire Ferrules
Ferrules sized for 10 AWG PV wire landing in breakers and terminal blocks.
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2/0 AWG Welding Cable Kit (Red + Black)
Fine-strand, flexible pure copper cable for high-current battery and inverter runs. The kit includes lugs and heat shrink.
See it in a video4 AWG THHN Wire (Black/White/Red) + 6 AWG Green
Building wire for the AC side: hots, neutral and ground pulled through conduit between the inverter, transfer switch and panel.
See it in a videoTEMCo 2 AWG Welding Cable (20′ Red + 20′ Black)
Made-in-USA, fine-strand 2 AWG cable for battery and DC connections that need to bend easily.
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UV-resistant, made-in-USA solar cable for running panel strings to the charge controller.
See it in a video4/0 AWG Welding Cable Kit (Red + Black)
Fine-strand 4/0 cable with lugs for high-current battery-to-bus runs.
See it in a videoWindyNation 10 AWG PV Wire (100′ Pair)
Red and black solar cable for running panel strings down from the roof.
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1″ Liquid-Tight Conduit (100′)
Flexible, weatherproof conduit for protecting wire runs outdoors and between equipment.
See it in a videoEnclosures & Combiners
Watts247 4-to-2 PV Combiner Box
Combines four PV strings into two outputs, with fusing for each string — a tidy way to bring several strings down to the charge controllers.
Watch my review
VEVOR 20×20×6″ NEMA 4 Enclosure
Weatherproof steel enclosure I used to build my DIY PV junction box. Available as a UL-tested version from VEVOR or a non-UL version on Amazon.
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