Find replacement for Heckert Solar ZEUS 2.1 132-620

620 W TOPCon solar panel with 132 cells. Voc 49.1 V · Isc 16.06 A · TcVoc -0.24%/°C.

Original Panel

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Same technology onlyShow only panels with matching cell technology

Compatible Replacements

200 panels found · 3500 panels excluded

Tongwei TWMNH-66HD620

620 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.1 V	0.0%
Vmpp	40.82 V	40.82 V	0.0%
Isc	16.06 A	16.06 A	0.0%
Impp	15.19 A	15.19 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.28 %/°C	±0.000 %/°C

Jetion Solar JT620SLt(B)

620 W

TOPCon

98Exact match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.1 V	0.0%
Vmpp	40.82 V	40.82 V	0.0%
Isc	16.06 A	16.06 A	0.0%
Impp	15.19 A	15.19 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

Yingli Solar YL620CF66 i/2

620 W

TOPCon

93Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.08 V	0.0%
Vmpp	40.82 V	41.14 V	0.8%
Isc	16.06 A	16.04 A	0.1%
Impp	15.19 A	15.07 A	0.8%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

AE Solar CMER-132BDS-610

610 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49 V	0.2%
Vmpp	40.82 V	40.8 V	0.0%
Isc	16.06 A	15.96 A	0.6%
Impp	15.19 A	14.95 A	1.6%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

Risen RSM132-11-620BNDG

620 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.08 V	0.0%
Vmpp	40.82 V	40.81 V	0.0%
Isc	16.06 A	16.04 A	0.1%
Impp	15.19 A	15.2 A	0.1%
TcVoc	-0.24 %/°C	-0.25 %/°C	±0.010 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

Heckert Solar ZEUS 2.1 132-625

625 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.3 V	0.4%
Vmpp	40.82 V	40.96 V	0.3%
Isc	16.06 A	16.12 A	0.4%
Impp	15.19 A	15.26 A	0.5%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.28 %/°C	±0.000 %/°C

Tongwei TWMNH-66HD615

615 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	48.9 V	0.4%
Vmpp	40.82 V	40.65 V	0.4%
Isc	16.06 A	16 A	0.4%
Impp	15.19 A	15.13 A	0.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.28 %/°C	±0.000 %/°C

Tongwei TWMNH-66HD625

625 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.3 V	0.4%
Vmpp	40.82 V	40.96 V	0.3%
Isc	16.06 A	16.12 A	0.4%
Impp	15.19 A	15.26 A	0.5%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.28 %/°C	±0.000 %/°C

RECOM RCM-620-RDBNM

620 W

TOPCon

91Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.02 V	0.2%
Vmpp	40.82 V	40.72 V	0.2%
Isc	16.06 A	16.1 A	0.2%
Impp	15.19 A	15.23 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.3 %/°C	±0.020 %/°C

Trina Solar TSM-NEG19RC.70-635

635 W

TOPCon

91Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.1 V	0.0%
Vmpp	40.82 V	40.84 V	0.0%
Isc	16.06 A	16.44 A	2.4%
Impp	15.19 A	15.55 A	2.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

Trina Solar TSM-NEG19RC.20-635

635 W

TOPCon

91Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.1 V	0.0%
Vmpp	40.82 V	40.84 V	0.0%
Isc	16.06 A	16.44 A	2.4%
Impp	15.19 A	15.55 A	2.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

Trina Solar TSM-NED19RC.20-635

635 W

TOPCon

91Good match

Parameter	Original	Replacement	Deviation
Voc	49.1 V	49.1 V	0.0%
Vmpp	40.82 V	40.84 V	0.0%
Isc	16.06 A	16.44 A	2.4%
Impp	15.19 A	15.55 A	2.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.28 %/°C	-0.29 %/°C	±0.010 %/°C

String Compatibility Calculator

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Original Panel Specs

Voc

49.1 V

Vmpp

40.82 V

Isc

16.06 A

Impp

15.19 A

TcVoc

-0.24 %/°C

TcPmax

-0.28 %/°C

Pmax

620 W

Cells

132

Bifaciality

80%

Length

2382 mm

Width

1134 mm

Thickness

30 mm

Weight

32.5 kg

The Heckert Solar ZEUS 2.1 132-620 is a 620 W solar panel. Finding a compatible replacement requires matching the original electrical characteristics — particularly Voc, Vmpp, Isc, and temperature coefficients — to ensure safe operation within the same string.

Use the form above to find panels that match these specifications. Then verify the replacement in the String Compatibility Calculator with your inverter.

Other models in this series

Power	Voc	Isc
625 W	49.3 V	16.12 A
630 W	49.5 V	16.18 A
635 W	49.6 V	16.26 A
640 W	49.75 V	16.33 A

Frequently Asked Questions

What specs must match when replacing the Heckert Solar ZEUS 2.1 132-620?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 49.1 V (within ±5%), and temperature coefficient TcVoc close to -0.24%/°C. If Voc differs significantly, the string voltage at extreme temperatures may shift outside the inverter's MPPT range. The replacement finder above pre-screens all candidates by these criteria.

Can I use a higher wattage replacement for the Heckert Solar ZEUS 2.1 132-620?

A higher wattage panel usually has a higher Vmpp or Isc, which can affect string voltage and current. Small increases (up to 10–15%) are typically safe if the other electrical specs align. The replacement finder shows a compatibility score — 'Exact match' means the specs align closely. Always verify the replacement in the String Compatibility Calculator with your inverter before installation.

What happens if the replacement panel has different voltage specs?

If the replacement has a significantly different Voc or Vmpp, the string voltage may shift outside the inverter's MPPT range, reducing energy production or causing faults. This effect is amplified at temperature extremes: at low temperatures, voltage rises by the TcVoc coefficient. The replacement finder automatically accounts for this — it scores candidates by how closely the electrical specs match the original Heckert Solar ZEUS 2.1 132-620.