TOPDC BT-501 500 Amp
#4 in Load testersFull review
An adjustable 500 A carbon-pile tester with a built-in test timer, for car, truck and farm batteries.
Amazon $135.99$135.99
The TOPDC BT-501 500 Amp rates 3.1 among load testers car battery testers; the Clore Solar BA9 rates 2.9 among digital testers ones. The Clore Solar BA9 costs $75.07 less ($60.92 vs $135.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Clore Solar BA9
A basic, low-cost 12 V tester from the maker of the Solar shop line, for cars with ordinary batteries.
Amazon $60.92$60.92
Scores side by side
These two sit in different type classes (load testers and digital testers), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | TOPDC BT-501 500 Amp | Clore Solar BA9 |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| Price 25% | 57 $135.99 | 91 $60.92 |
| Battery coverage 25% | 37 up to 1,000 CCA, 6 V batteries | 26 up to 1,200 CCA |
| System tests 20% | 40 tests the charging system | 50 system tests not published (neutral score used) |
| Features or load 20% | 70 500 A load | 0 none of the listed features |
| Warranty 10% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| TOPDC BT-501 500 Amp | Clore Solar BA9 | |
|---|---|---|
| Testing | ||
| Type | Carbon pile | Conductance (digital) |
| Battery voltages | 6/12 V | 12 V |
| System voltages | 12 V | 12 V |
| Rating range | up to 1,000 CCA | 40-1,200 CCA |
| Load current | 500 A | - |
| Battery types | - | Flooded, AGM, spiral, gel |
| Charging system test | Yes | - |
| Features | ||
| Display | Analog | LCD |
| Build | ||
| Warranty | - | 1 year |