Best Battery Combiner Box (2026): 5 PV Boxes Compared

The listing states 6 strings, six 16A DC circuit breakers, an 80A DC main circuit breaker and a 40kA surge arrester, with short circuit, overvoltage, overcurrent and grounding protection and a quick disconnect on fault. The housing is cold rolled steel with an IP65 code, and the spec table gives 11.02 by 11.02 by 5.12 inches. The spec table lists the item count as 0, which does not fit a box that ships as one unit, so trust the title and bullets for the contents.

Who it's for: owners wiring six strings who want a breaker on each string plus a main breaker. Who should skip it: owners with two strings, who will leave four breaker slots unused.

Its Solar Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 9/10 and warranty 0/5: 84 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.

What this listing states. IP65 cold rolled steel housing, 80A main breaker, 16A per-string breakers and 40kA surge arrester stated, so safety scores 9 of 10. No warranty term, so warranty scores zero. See How We Pick.

Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states 2 strings in and 2 outputs, 20A per string, a 20A DC500V breaker, a 20A DC500V fuse and a DC500V 40KA surge device, with overvoltage, overload and quick disconnect functions and support for up to 20kW in a 500V system. The housing is ABS and PC with an IP65 code and a transparent cover, and the spec table gives 11.73 by 11.73 by 5.51 inches. The spec table color field reads 2in x 30A 2out x 32A 500V, which does not match the 20A figures in the title and bullets, so trust the title and bullets for the current figures.

Who it's for: owners with two strings who want a fuse, a breaker and surge protection in one pre-wired box. Who should skip it: owners with four or six strings, who need a box with more inputs.

Its Solar Score of 9.7/10 comes from performance 30/35, build 21/25, value 21/25, safety 9/10 and warranty 0/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.

What this listing states. IP65 ABS and PC housing, 20A breaker, 20A fuse and 40kA surge device stated, so safety scores 9 of 10. No warranty term, so warranty scores zero. See How We Pick.

Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states 4 strings, a 63A circuit breaker, a 20A fuse on each string, 9AWG cable and a lightning arrester, with a metal housing and an IP65 code and pre-wired connections plus 4 pairs of connectors. The same bullets give a maximum current of 32A for one string, which sits above the 20A fuse listed for that string, so trust the fuse figure when matching string current and treat the 32A figure with care.

Who it's for: owners with four strings who want a metal box with a large main breaker. Who should skip it: owners whose strings run near 32A, who need a fuse figure that matches that current.

Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 20/25, safety 8/10 and warranty 0/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.

What this listing states. IP65 metal housing, 63A breaker, 20A fuses and lightning arrester stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.

Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states 4 strings with independent 20A fuses, a 2P63A DC circuit breaker and surge and lightning protection, in a high-strength plastic housing with an IP65 code and a rubber door seal. It gives 6.7 by 4.3 by 8.6 inches and a range of -20°C to 70°C, with MC4 connectors, pre-connected cables, a snap-lock and a rotary handle. No system voltage is stated, so match the box to your array voltage before ordering.

Who it's for: owners with four strings who want a compact box with a fuse on each string. Who should skip it: owners who want a metal housing or a stated system voltage on the listing.

Its Solar Score of 9.6/10 comes from performance 28/35, build 20/25, value 21/25, safety 8/10 and warranty 0/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.

What this listing states. IP65 plastic housing, 63A breaker, 20A fuses and surge and lightning protection stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.

Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states 2 strings in and 2 outputs, 20A per string, a 20A DC500V breaker and a T2 DC500V surge device, with overvoltage, overload and rapid disconnect functions and support for up to 10kW in a 500V system. The spec table gives 1.0 by 1.0 by 1.0 inches, which cannot fit a wall-mounted box, and one bullet repeats word for word, so trust the title and bullets for the figures and ignore the spec table size.

Who it's for: owners with two strings who want a simple breaker and surge device box. Who should skip it: owners who want a fuse on each string, who should look at the other JINDOUZI box here.

Its Solar Score of 9.5/10 comes from performance 27/35, build 20/25, value 20/25, safety 7/10 and warranty 0/5: 74 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.

What this listing states. IP65 housing, 20A breaker and T2 surge device stated, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.

Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.